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| 1 | Advanced characterization of pores and fractures in coals by nuclear magnetic resonance and X-ray computed tomography显示文摘This paper demonstrates capabilities of low-field nuclear magnetic resonance (NMR) and microfocus X-ray computed tomography (μCT) in advanced, nondestructive, and quantitative characterization of pore types, producible porosity, pore structure, and spatial disposition of pore-fractures in coals. Results show that the NMR transverse relaxation time (T2) at 0.5–2.5, 20–50, and >100 ms correspond to pores of <0.1 μm, >0.1 μm, and fractures, respectively. A much higher T2 spectrum peak reflects a much better development of pores (or fractures) corresponding to the T2, and vice versa. Three basic components in coals, i.e., the pores (or fractures), coal matrix, and minerals have their distinctive range of CT numbers. Among these, the CT number of pores is commonly less than 600 HU. The producible porosity, which is a determination of permeability, can be calculated by T2 cutoff value (T2C) of coal NMR. The coal pore structure can be efficiently estimated by the newly proposed 'T2C based model'. Finally, μCT scan was proven capable of modeling and spatial visualization of pores and fractures. | YAO YanBin, LIU DaMeng, CAI YiDong & LI JunQian School of Energy Resources, China University of Geosciences, Beijing 100083, China | 2010 | Science China Earth Sciences2010，53，6： | 61 |
| 2 | Noninvasive imaging of hepatocellular carcinoma: From diagnosis to prognosis显示文摘Hepatocellular carcinoma(HCC) is the most common primary liver cancer and a major public health problem worldwide. Hepatocarcinogenesis is a complex multistep process at molecular, cellular, and histologic levels with key alterations that can be revealed by noninvasive imaging modalities. Therefore, imaging techniques play pivotal roles in the detection, characterization, staging, surveillance, and prognosis evaluation of HCC. Currently, ultrasound is the first-line imaging modality for screening and surveillance purposes. While based on conclusive enhancement patterns comprising arterial phase hyperenhancement and portal venous and/or delayed phase wash-out, contrast enhanced dynamic computed tomography and magnetic resonance imaging(MRI) are the diagnostic tools for HCC without requirements for histopathologic confirmation. Functional MRI techniques, including diffusion-weighted imaging, MRI with hepatobiliary contrast agents, perfusion imaging, and magnetic resonance elastography, show promise in providing further important information regarding tumor biological behaviors. In addition, evaluation of tumor imaging characteristics, including nodule size, margin, number, vascular invasion, and growth patterns, allows preoperative prediction of tumor microvascular invasion and patient prognosis. Therefore, the aim of this article is to review the current state-of-the-art and recent advances in the comprehensive noninvasive imaging evaluation of HCC. We also provide the basic key concepts of HCC development and an overview of the current practice guidelines. | Han-Yu Jiang Jie Chen Chun-Chao Xia Li-Kun Cao Ting Duan Bin Song | 2018 | World Journal of Gastroenterology2018，24，22： | 37 |
| 3 | Diagnostic accuracy of a deep learning approach to calculate FFR from coronary CT angiography显示文摘Background The computational fluid dynamics(CFD)approach has been frequently applied to compute the fractional flow reserve(FFR)using computed tomography angiography(CTA).This technique is efficient.We developed the DEEPVESSEL-FFR platform using the emerging deep learning technique to calculate the FFR value out of CTA images in five minutes.This study is to evaluate the DEEPVESSEL-FFR platform using the emerging deep learning technique to calculate the FFR value from CTA images as an efficient method.Methods A single-center,prospective study was conducted and 63 patients were enrolled for the evaluation of the diagnostic performance of DEEPVESSEL-FFR.Automatic quantification method for the three-dimensional coronary arterial geometry and the deep learning based prediction of FFR were developed to assess the ischemic risk of the stenotic coronary arteries.Diagnostic performance of the DEEPVESSEL-FFR was assessed by using wire-based FFR as reference standard.The primary evaluation factor was defined by using the area under receiver-operation characteristics curve(AUC)analysis.Results For per-patient level,taking the cut-off value<0.8 referring to the FFR measurement,DEEPVESSEL-FFR presented higher diagnostic performance in determining ischemia-related lesions with area under the curve of 0.928 compare to CTA stenotic severity 0.664.DEEPVESSEL-FFR correlated with FFR(R=0.686,P<0.001),with a mean di&ference of-0.006士0.0091(P=0.619).The secondary evaluation factors,indicating per vessel accuracy,sensitivity,specificity,positive predictive value,and negative predictive value were 87.3%,97.14%,75%,82.93%,and 95.45%,respectively.Conclusion DEEPVESSEL-FFR is a novel method that allows efficient assessment of the functional significance of coronary stenosis. | Zhi-Qiang WANG Yu-Jie ZHOU Ying-Xin ZHAO Dong-Mei SHI Yu-Yang LIU Wei LIU Xiao-Li LIU Yue-Ping LI | 2019 | Journal of Geriatric Cardiology2019，16，1： | 37 |
| 4 | Rectal gastrointestinal stromal tumors:Imaging features with clinical and pathological correlation显示文摘AIM:To investigate computed tomography(CT) and magnetic resonance imaging(MRI) manifestations of rectal gastrointestinal stromal tumors(GISTs) in order to enhance the recognition of these rare tumors.METHODS:Fourteen patients with pathologically proven rectal GISTs were retrospectively reviewed.Patient histories were retrospectively reviewed for patient age,gender,presenting symptoms,endoscopic investigations,operation notes and pathologic slides.All tumors were evaluated for CD117,CD34 expression,and the tumors were stratified according to current criteria of the National Institutes of Health(NIH).In all cases the first pre-operation imaging findings(CT and MRI,n = 3;MRI only,n = 8;CT only,n = 3) were analyzed by two experienced radiologists by consensus,which include:tumor size,shape,CT density(hypodense,isodense and hyperdense),MRI signal intensity(hypointense,isointense and hyperintense),epicenter(intraluminal or extraluminal),margin(well-defined or ill-defined),internal component(presence of calcifications,necrosis,hemorrhage or ulceration),pattern and degree of enhancement,invasion into adjacent structures.After review of the radiologic studies,clinical and pathological findings were correlated with radiological findings.RESULTS:The patients,13 men and 1 woman,were aged 31-62 years(mean = 51.5 ± 10.7 years).The most common initial presentation was hematochezia(n = 6).The mean tumor diameter was 5.68 ± 2.64 cm(range 1.5-11.2 cm).Eight lesions were round or oval,and 6 lesions were irregular.Eleven lesions were welldefined and 3 had ill-defined margins.Ten tumors were extraluminal and 4 were intraluminal.The density and MR signal intensity of the solid component of the lesions were similar to that of muscle on unenhanced CT(n = 6) and T1-weighted images(n = 11),and hyperintense on T2-weighted MR images.Calcification was detected in 2 tumors.Following intravenous injection of contrast media,3 lesions had mild enhancement and 11 lesions had moderate enhancement.Enhancement was homogenous in 3 lesions and heterogeneous in 11.In 1 of 11 patients who underwent both CT and MRI,the tumor was homogenous on CT scan and heterogeneous on MRI.Eight patients were classified as high risk according to the modified recurrent risk classification system of NIH.CONCLUSION:Rectal GISTs usually manifest as large,well-circumscribed,exophytic masses with moderate and heterogeneous enhancement on CT and MRI.The invasion of adjacent organs,bowel obstruction and local adenopathy are uncommon. | Zhao-Xia Jiang Sheng-Jian Zhang Wei-Jun Peng Bao-Hua Yu | 2013 | World Journal of Gastroenterology2013，19，20： | 31 |
| 5 | Current imaging strategies for the evaluation of uterine cervical cancer显示文摘Uterine cervical cancer still remains an important socioeconomic issue because it largely affects women of reproductive age.Prognosis is highly depended on extent of the disease at diagnosis and,therefore,accurate staging is crucial for optimal management.Cervical cancer is clinically staged,according to International Federation of Gynecology and Obstetrics guidelines,but,currently,there is increased use of cross sectional imaging modalities [computed tomography(CT),magnetic resonance imaging(MRI),positron emission tomography-CT(PET-CT)] for the study of important prognostic factors like tumor size,parametrial invasion,endocervical extension,pelvic side wall or adjacent/distal organs involvement and lymph node status.Imaging indications also include cervical cancer follow-up,evaluation of tumor response to treatment and selection of suitable candidates for less radical surgeries like radical trachelectomy for fertility preservation.The preferred imaging method for local cervical cancer evaluation is MRI;CT is equally effective for evaluation of extrauterine spread of the disease.PETCT shows high diagnostic performance for the detection of tumor relapse and metastatic lymph nodes.The aim of this review is to familiarize radiologists with the MRI appearance of cervical carcinoma and to discuss the indications of cross sectional imaging during the course of the disease in patients with cervical carcinoma. | Charis Bourgioti Konstantinos Chatoupis Lia Angela Moulopoulos | 2016 | World Journal of Radiology2016，8，4： | 29 |
| 6 | Colorectal cancer:Current imaging methods and future perspectives for the diagnosis, staging and therapeutic response evaluation显示文摘In the last 10 years the mortality rate of colorectal cancer(CRC)has decreased by more than 20%due to the rising developments in diagnostic techniques and optimization of surgical,neoadjuvant and palliative therapies.Diagnostic methods currently used in the evaluation of CRC are heterogeneous and can vary within the countries and the institutions.This article aims to discuss in depth currently applied imaging modalities such as virtual computed tomography colonoscopy,endorectal ultrasound,computed tomography(CT)and magnetic resonance imaging(MRI)in the diagnosis of CRC.Special focus is put on the potential of recent diagnostic developments as diffusion weighted imaging MRI,MRI biomarkers(dynamic enhanced MRI),positron emission tomography with 2-(fluorine-18)-fluoro-2-deoxy-D-glucose(FDG-PET)combined with computed tomography(PET/CT)and new hepatobiliary MRI contrast agents.The precise role,advantage and disadvantages of these modalities are evaluated controversially in local staging,metastatic spread and treatment monitoring of CRC.Finally,the authors will touch upon the future perspectives in functional imaging evaluating the role of integrated FDG-PET/CT with perfusion CT,MRI spectroscopy of primary CRC and hepatic transit time analysis using contrast enhanced ultrasound and MRI in the detection of liver metastases.Validation of these newer imaging techniques may lead to significant improvements in the management of patients with colorectal cancer. | Maka Kekelidze Luigia D'Errico Michele Pansini Anthony Tyndall Joachim Hohmann | 2013 | World Journal of Gastroenterology2013，19，46： | 28 |
| 7 | Initial management for acute lower gastrointestinal bleeding显示文摘Acute lower gastrointestinal bleeding(LGIB) is a common indication for hospital admission. Patients with LGIB often experience persistent or recurrent bleeding and require blood transfusions and interventions, such as colonoscopic,radiological, and surgical treatments. Appropriate decision-making is needed to initially manage acute LGIB, including emergency hospitalization, timing of colonoscopy, and medication use. In this literature review, we summarize the evidence for initial management of acute LGIB. Assessing various clinical factors,including comorbidities, medication use, presenting symptoms, vital signs, and laboratory data is useful for risk stratification of severe LGIB, and for discriminating upper gastrointestinal bleeding. Early timing of colonoscopy had the possibility of improving identification of the bleeding source, and the rate of endoscopic intervention, compared with elective colonoscopy. Contrast-enhanced computed tomography before colonoscopy may help identify stigmata of recent hemorrhage on colonoscopy, particularly in patients who can be examined immediately after the last hematochezia. How to deal with nonsteroidal antiinflammatory drugs(NSAIDs) and antithrombotic agents after hemostasis should be carefully considered because of the risk of rebleeding and thromboembolic events. In general, aspirin as primary prophylaxis for cardiovascular events and NSAIDs were suggested to be discontinued after LGIB. Managing acute LGIB based on this information would improve clinical outcomes. Further investigations are needed to distinguish patients with LGIB who require early colonoscopy and hemostatic intervention. | Tomonori Aoki Yoshihiro Hirata Atsuo Yamada Kazuhiko Koike | 2019 | World Journal of Gastroenterology2019，25，1： | 28 |
| 8 | Solitary fibrous tumors in abdomen and pelvis:Imaging characteristics and radiologic-pathologic correlation显示文摘AIM:To describe the imaging features of solitary fibrous tumors(SFTs)in the abdomen and pelvis,and the clinical and pathologic correlations.METHODS:Fifteen patients with pathologically confirmed SFTs in the abdomen and pelvis were retrospectively studied with imaging techniques by two radiologists in consensus.Patients underwent unenhanced and contrast-enhanced imaging,as follows:3 with computed tomography(CT)and magnetic resonance imaging(MRI)examination,8 with CT examination only,and 4 with MRI examination only.Image characteristics such as size,shape,margin,attenuation or intensity,and pattern of enhancement were analyzed and correlated with the microscopic findings identified from surgical specimens.In addition,patient demographics,presentation,and outcomes were recorded.RESULTS:Of the 15 patients evaluated,local symptoms related to the mass were found in 11 cases at admission.The size of the mass ranged from 3.4 to 25.1cm(mean,11.5 cm).Nine cases were round or oval,6were lobulated,and 10 displaced adjacent organs.Unenhanced CT revealed a heterogeneous isodense mass in 7 cases,homogeneous isodense mass in 3 cases,and punctuated calcification in one case.On MRI,most of the lesions(6/7)were heterogeneous isointense and heterogeneous hyperintense on T1-weighted images and T2-weighted images,respectively.All tumors showed moderate to marked enhancement.Heterogeneous enhancement was revealed in 11 lesions,and 7of these had cysts,necrosis,or hemorrhage.Early nonuniform enhancement with a radial area that proved to be a fibrous component was observed in 4 lesions,which showed progressive enhancement in the venous and delayed phase.No statistical difference in the imaging findings was observed between the histologically benign and malignant lesions.Three patients had local recurrence or metastasis at follow-up.CONCLUSION:Abdominal and pelvic SFTs commonly appeared as large,solid,well-defined,hypervascular masses with variable degrees of necrosis or cystic change that often displaced adjacent structures. | Xue-Ming Li Jing Reng Peng Zhou Ying Cao Zhu-Zhong Cheng Yan Xiao Guo-Hui Xu | 2014 | World Journal of Gastroenterology2014，20，17： | 27 |
| 9 | Different histological subtypes of parotid gland tumors: CT findings and diagnostic strategy显示文摘AIM:To present computed tomography(CT) findings of different histological subtypes of parotid gland masses in detail and to establish diagnostic strategy.METHODS:From January 2009 to November 2011,56 patients were collected through the histopathology and Picture Archiving and Communication Systems records,which revealed 5 basal cell adenoma(BCA),16 pleomorphic adenoma(PA),25 Warthin's tumor(War-T),3 Kimura's disease(KD) and 7 parotid carcinoma(PCa) cases.All the CT images were retrospectively analyzed by two radiologists in consensus,based on their description of morphology(location,number,size,margin and fibrous capsule) and enhancement patterns of masses.In addition,the diagnostic efficiency of diagnostic strategy is tested.RESULTS:War-T and BCA patients' mean age was 59.9 ± 12.6 years and 58.4 ± 18.2 years;the significant difference was seen in War-T vs PA and BCA vs PA.About 40% of War-Ts presented with bilateral multifocal lesions,a higher ratio than others.Seventy two percent of War-Ts were limited to the superficial lobe,followed by BCA 60% and PA 40%.Vessel facing sign and enlarged lymph nodes were both frequent in War-T,which respectively accounts for 84% and 76% of cases.Rapid contrast enhancement and decreases were unique for War-T.BCA and PA showed obvious delayed enhancement.The diagnostic strategy of parotid gland tumor had a good diagnostic efficiency,with high accuracy,sensitivity and specificity.CONCLUSION:Determination of the histological subtypes of parotid gland masses might be possible based on CT findings and clinical data.A diagnostic strategy with high diagnostic efficiency was established. | Zhi-Feng Xu Fang Yong Tian Yu Ying-Yu Chen Qiang Gao Tao Zhou Ai-Zhen Pan Ren-Hua Wu | 2013 | World Journal of Radiology2013，5，8： | 25 |
| 10 | CT and MRI diagnosis of hepatic epithelioid hemangioendothelioma显示文摘BACKGROUND:Hepatic epithelioid hemangioendothelioma (EHE)is a rare,low-grade malignant vascular tumor.Although its unusual imaging and pathologic findings are being recognized with increasing frequency,diagnosis is still difficult.This study aimed to analyze the CT and MRI features of hepatic EHE with a pathological study in order to improve the diagnostic accuracy and knowledge of this disease in daily practice. METHODS:Nine patients with hepatic EHE confirmed pathologi- cally underwent plain and dynamic contrast-enhanced multi- detector row CT examination.Of these patients,four under- went additional MRI(plain T1-weighted imaging(T1WI),T2- weighted imaging(T2WI),and dynamic contrast-enhanced scanning)and one had selective hepatic arteriography.The imaging findings were reviewed retrospectively together with the pathological results. RESULTS:A total of 79 lesions,ranging from 3.0 to 44.6 mm in maximum diameter,with an average of 16.8±7.1 mm,were found in various segments of the liver.Thirty of the 79 lesions grew adjacent to the hepatic capsule.In the 4 patients receiving MRI,39 lesions were found with low signal intensity on unenhanced T1WI and intermediate to high signal intensity on T2WI.The'capsular retraction'sign was found in all the 4 patients.Nine of the 39 lesions showed the'halo'sign after contrast enhancement on MRI.Of the 79 lesions(hypodense nodules)in the 9 patients shown by unenhanced plain CT,26 were confluent.Calcification was found in 2 patients and the 'capsular retraction'sign in 7.Thirty-eight of the 79 lesions demonstrated the'halo'sign after contrast enhancement on CT,and this sign was more clearly demonstrated in the portal venous phase.In one patient,selective hepatic arteriography showed patchy stain in the peripheral liver parenchyma with small vessels around them.Histology in all patients revealed proliferation of abnormal fibrous tissue and vessel-like structures scattered with irregular epithelioid cells having a signet ring-like structure.Immunohistochemically,all patients were positive for CD34,4 were positive for CD31,and 3 were positive for factorⅧ-related antigen. CONCLUSIONS:Hepatic EHE may manifest as solitary or diffuse nodular lesions with a predilection for peripheral subcapsular growth and nodular confluence,together with the 'halo'and'capsular retraction'signs.These imaging findings can help to improve the diagnostic accuracy of this rare hepatic tumor. | Lin, Jiang Ji, Yuan | 2010 | Hepatobiliary & Pancreatic Diseases International2010，9，2： | 26 |
| 11 | State-of-the-art preoperative staging of gastric cancer by MDCT and magnetic resonance imaging显示文摘Gastric cancer is one of the most common and fatal cancers.The importance of accurate staging for gastric cancer has become more critical due to the recent introduction of less invasive treatment options,such as endoscopic mucosal resection or laparoscopic surgery.The tumor-node-metastasis staging system is the generally accepted staging system for predicting the prognosis of patients with gastric cancer.Multidetector row computed tomography(MDCT)is a widely accepted imaging modality for the preoperative staging of gastric cancer that can simultaneously assess locoregional staging,including the gastric mass,regional lymph nodes,and distant metastasis.The diagnostic performance of MDCT for T-and N-staging has been improved by the technical development of isotropic imaging and 3D reformation.Although magnetic resonance imaging(MRI)was not previously used to evaluate gastric cancer due to the modality’s limitations,the development of high-speed sequences has made MRI a feasible tool for the staging of gastric cancer. | Joon-Il Choi Ijin Joo Jeong Min Lee | 2014 | World Journal of Gastroenterology2014，20，16： | 26 |
| 12 | Common bile duct stones on multidetector computed tomography:Attenuation patterns and detectability显示文摘AIM:To investigate the attenuation patterns and detectability of common bile duct(CBD) stones by multidetector computed tomography(MDCT).METHODS:Between March 2010 and February 2012,191 patients with suspicion of CBD stones undergoing both MDCT and endoscopic retrograde cholangiopancreatography(ERCP) were enrolled and reviewed retrospectively.The attenuation patterns of CBD stones on MDCT were classified as heavily calcified,radiopaque,less radiopaque,or undetectable.The association between the attenuation patterns of CBD stones on MDCT and stone type consisting of pure cholesterol,mixed cholesterol,brown pigment,and black pigment and the factors related to the detectability of CBD stones by MDCT were evaluated.RESULTS:MDCT showed CBD stones in 111 of 130 patients in whom the CBD stones were demonstrated by ERCP with 85.4% sensitivity.The attenuation patterns of CBD stones on MDCT were heavily calcified 34(26%),radiopaque 31(24%),less radiopaque 46(35%),and undetectable 19(15%).The radiopacity of CBD stones differed significantly according to stone type(P < 0.001).From the receiver operating characteristic curve,stone size was useful for the determination of CBD stone by MDCT(area under curve 0.779,P < 0.001) and appropriate cut-off stone size on MDCT was 5 mm.The factors related to detectability of CBD stones on MDCT were age,stone type,and stone size on multivariate analysis(P < 0.05).CONCLUSION:The radiopacity of CBD stones on MDCT differed according to stone type.Stone type and stone size were related to the detectability by MDCT,and appropriate cut-off stone size was 5 mm. | Chang Whan Kim Jae Hyuck Chang Yeon Soo Lim Tae Ho Kim In Seok Lee Sok Won Han | 2013 | World Journal of Gastroenterology2013，19，11： | 24 |
| 13 | Multi-slice three-dimensional spiral CT cholangiography: a new technique for diagnosis of biliary diseases显示文摘Objective: To validate multi-slice three-dimensionalspiral CT cholangiography (3-D CTC) in clinical di-agnosis of biliary diseases.Methods: This study included 146 patients with bili-ary diseases, involving 73 cases of biliary tumor, 87cases of radioparent calculus, 12 cases of post cholan-gio-jejunostomy and one case of congenital choledo-chocyst. The data of thin-slice volumetric CT scanwere sent to the workstation (GE Advantage Win-dows 3. 1). Rational 3-D CTC including maximumintensity projection, minimum intensity projection,surface shaded display, CT virtual endoscopy andray sumption was performed. The diagnostic accura-cy of 3-D CTC was compared with that of conven-tional CT, ultrasonography and endoscopic retro-grade cholangiopancreaticography (ERCP).Results: Different biliary diseases showed distinct ima-ging manifestations on 3-D CTC, As a new techniquefor assessing the status of post cholangio-jejunosto-my, 3-D CTC was superior to conventional CT, ul-trasonography and ERCP in diagnosis of negative bil-iary calculus, extrahepatic cholangiocarcinoma,cancer embolus of the biliary duct, carcinoma of thepancreas head and periampullar carcinoma. It wasalso superior to conventional CT, ultrasonography orequal to ERCP in diagnosis of hilar cholangiocarcino-ma, but inferior to conventional CT and ultrasonog-raphy in diagnosis of gallbladder cancer.Conclusion: 3-D CTC as a non-invasive and sensitivetechnique for the diagnosis of biliary diseases withhigh diagnostic accuracy will greatly increase the de-tection rate of biliary diseases. | Ai-Min Xu Hong-Yan Cheng Wen-Bin Jiang Dong Chen Yu-Chen Jia Meng-Chao Wu the Department of Radiology, Eastern Hepatobiliary Surgery Hospital, Shanghai 200438, China | 2002 | Hepatobiliary & Pancreatic Diseases International2002，1，4： | 22 |
| 14 | Radiation pneumonitis after stereotactic radiation therapy for lung cancer显示文摘Stereotactic body radiation therapy(SBRT)has a locacontrol rate of 95%at 2 years for non-small cell lungcancer(NSCLC)and should improve the prognosis oinoperable patients,elderly patients,and patients withsignificant comorbidities who have early-stage NSCLCThe safety of SBRT is being confirmed in internationalmulti-institutional PhaseⅡtrials for peripheral lungcancer in both inoperable and operable patients,bureports so far have found that SBRT is a safe and effective treatment for early-stage NSCLC and early metastatic lung cancer.Radiation pneumonitis(RP)is oneof the most common toxicities of SBRT.Although mospost-treatment RP is Grade 1 or 2 and either asymptomatic or manageable,a few cases are severe,symptomatic,and there is a risk for mortality.The reportedrates of symptomatic RP after SBRT range from 9%to28%.Being able to predict the risk of RP after SBRT isextremely useful in treatment planning.A dose-effecrelationship has been demonstrated,but suggesteddose-volume factors like mean lung dose,lung V20and/or lung V2.5 differed among the reports.We foundthat patients who present with an interstitial pneumo-nitis shadow on computed tomography scan and high levels of serum Krebs von den Lungen-6 and surfactant protein D have a high rate of severe radiation pneumo-nitis after SBRT.At our institution,lung cancer patients with these risk factors have not received SBRT since 2006,and our rate of severe RP after SBRT has de-creased significantly since then. | Hideomi Yamashita Wataru Takahashi Akihiro Haga Keiichi Nakagawa | 2014 | World Journal of Radiology2014，6，9： | 22 |
| 15 | 腰椎后路椎间融合术后椎间融合的X线片及三维CT评价显示文摘目的 探讨X线片和三维CT(3D-CT)在判定单节段后路腰椎椎间融合术后椎间融合情况的临床价值.方法 选取接受后路腰椎椎间融合术并随访1年以上的患者43例,男19例,女24例;年龄16~74岁,平均47.2岁.峡部裂性滑脱21例,退变性滑脱15例,腰椎间盘突出并不稳症3例,腰椎间盘突出症复发3例,极外侧椎间盘突出症1例.单纯骨粒植骨26例,骨粒加椎间融合器17例.单节段内固定24例,双节段内固定19例.均为单节段椎间融合,其中L3,4,6例,L4,5,17例,L5 S1 20例.应用改良Brantigan评分判定腰椎正侧位X线片及3D-CT扫描所示椎间融合程度;动力位X线片判断椎间稳定性.结果 随访12~85个月,平均18个月.末次随访时X线片及3D-CT所示椎间融合率分别为64%(28/43例)和40%(17/43例).3D-CT的Brantigan评分小于正侧位X线片(P<0.05).根据诊断、固定节段及融合方式不同分组,各组3D-CT评分均低于正侧位X线片(P<0.05).动力位X线片示椎间不稳定者仅3例(7%).结论 腰椎3D-CT能更准确地评价椎间融合情况.拆除内固定前进行3D-CT检查非常必要.拆除内固定前摄动力位X线片对判定椎体间融合的临床意义不大. | 郑燕平 刘新宇 贾龙 王延国 黎君彦 | 2009 | 中华骨科杂志2009，29，12： | 22 |
| 16 | Assessment of tumor vascularization with functional computed tomography perfusion imaging in patients with cirrhotic liver disease显示文摘BACKGROUND:Hepatocellular carcinoma(HCC)is a common malignant tumor in China,and early diagnosis is critical for patient outcome.In patients with HCC,it is mostly based on liver cirrhosis,developing from benign regenerative nodules and dysplastic nodules to HCC lesions,and a better understanding of its vascular supply and the hemodynamic changes may lead to early tumor detection.Angiogenesis is essential for the growth of primary and metastatic tumors due to changes in vascular perfusion,blood volume and permeability.These hemodynamic and physiological properties can be measured serially using functional computed tomography perfusion(CTP)imaging and can be used to assess the growth of HCC.This study aimed to clarify the physiological characteristics of tumor angiogenesis in cirrhotic liver disease by this fast imaging method. METHODS:CTP was performed in 30 volunteers without liver disease(control subjects)and 49 patients with liver disease (experimental subjects:27 with HCC and 22 with cirrhosis). All subjects were also evaluated by physical examination, laboratory screening and Doppler ultrasonography of the liver. The diagnosis of HCC was made according to the EASL criteria. All patients underwent contrast-enhanced ultrasonography, pre-and post-contrast triple-phase CT and CTP study.A mathematical deconvolution model was applied to provide hepatic blood flow(HBF),hepatic blood volume(HBV), mean transit time(MTT),permeability of capillary vessel surface(PS),hepatic arterial index(HAI),hepatic arterial perfusion(HAP)and hepatic portal perfusion(HPP)data. The Mann-Whitney U test was used to determine differences in perfusion parameters between the background cirrhotic liver parenchyma and HCC and between the cirrhotic liver parenchyma with HCC and that without HCC.RESULTS:In normal liver,the HAP/HVP ratio was about 1/4. HCC had significantly higher HAP and HAI and lower HPP than background liver parenchyma adjacent to the HCC.The value of HBF at the tumor rim was significantly higher than that in the controls.HBF,HBV,HAI,HAP and HPP,but not MTT and PS,were significantly higher in the cirrhotic liver parenchyma involved with HCC than those of the controls. Perfusion parameters were not significantly different between the controls and the cirrhotic liver parenchyma not involved with HCC. CONCLUSIONS:CTP can clearly distinguish tumor from cirrhotic liver parenchyma and controls and can provide quantitative information about tumor-related angiogenesis, which can be used to assess tumor vascularization in cirrhotic liver disease. | Jin-Ping Li,De-Li Zhao,Hui-Jie Jiang,Ya-Hua Huang,Da-Qing Li,Yong Wan, Xin-Ding Liu and Jin-E Wang Department of Radiology,Second Affiliated Hospital,Harbin Medical University,Harbin150086,China | 2011 | Hepatobiliary & Pancreatic Diseases International2011，10，1： | 21 |
| 17 | Chronic obstructive pulmonary disease as a risk factor for lung cancer显示文摘The association between chronic obstructive pulmonary disease(COPD) and lung cancer has long been a subject of intense debate. The high prevalence of COPD in elderly smokers inevitably strengthens their coincidence. In addition to this contingent coincidence, recent studies have revealed a close association between the two diseases that is independent of the smoking history; that is, the existence of COPD is an independent risk factor for the development of lung cancer. Molecular-based evidence has been accumulating as a result of the efforts to explain the underlying mechanisms of this association. These mechanisms may include the following: the retention of airborne carcinogens followed by the activation of oncogenes and the suppression of tumor suppressor genes; the complex molecular mechanism associated with chronic inflammation in the distal airways of patients with COPD; the possible in-volvement of putative distal airway stem cells; and gel netic factors that are common to both COPD and lung cancer. The existence of COPD in patients with lung l cancer may potentially affect the process of diagnosis, surgical resection, radiotherapy, chemotherapy, and end-of-life care. The comprehensive management of COPD is extremely important for the appropriate treatment of lung cancer. Surgical resections with the aid of early interventions for COPD are often possible, even for patients with mild-to-moderate COPD. New challenges, such as lung cancer CT screening for individuals t at high risk, are now in the process of being implemented. Evaluating the risk of lung cancer in patients with COPD may be warranted in community-based lung cancer screening. | Yuichi Takiguchi Ikuo Sekine Shunichiro Iwasawa Ryota Kurimoto Koichiro Tatsumi | 2014 | World Journal of Clinical Oncology2014，5，4： | 21 |
| 18 | Imaging diagnosis of pancreatic cancer:A state-of-the-art review显示文摘Pancreatic cancer(PC)remains one of the deadliest cancers worldwide,and has a poor,five-year survival rate of 5%.Although complete surgical resection is the only curative therapy for pancreatic cancer,less than20%of newly-diagnosed patients undergo surgical resection with a curative intent.Due to the lack of early symptoms and the tendency of pancreatic adenocarcinoma to invade adjacent structures or to metastasize at an early stage,many patients with pancreatic cancer already have advanced disease at the time of their diagnosis and,therefore,there is a high mortality rate.To improve the patient survival rate,early detection of PC is critical.The diagnosis of PC relies on computed tomography(CT)and/or magnetic resonance imaging(MRI)with magnetic resonance cholangiopancreatography(MRCP),or biopsy or fine-needle aspiration using endoscopic ultrasound(EUS).Although multi-detector row computed tomography currently has a major role in the evaluation of PC,MRI with MRCP facilitates better detection of tumors at an early stage by allowing a comprehensive analysis of the morphological changes of the pancreas parenchyma and pancreatic duct.The diagnosis could be improved using positron emission tomography techniques in special conditions in which CT and EUS are not completely diagnostic.It is essential for clinicians to understand the advantages and disadvantages of the various pancreatic imaging modalities in order to be able to make optimal treatment and management decisions.Our study investigates the current role and innovative techniques of pancreatic imaging focused on the detection of pancreatic cancer. | Eun Sun Lee Jeong Min Lee | 2014 | World Journal of Gastroenterology2014，20，24： | 21 |
| 19 | Radiological diagnosis and staging of hilar cholangiocarcinoma显示文摘Hilar cholangiocarcinoma is a rare malignant tumor arising from the epithelium of the bile ducts.Surgery is still the only chance of potentially curative treatment in patients with perihilar cholangiocarcinoma.However,radical resection requires aggressive surgical strategies that should be tailored optimally according to the location,size and vascular invasion of the tumors.Accurate diagnosis and staging of these tumors is therefore critical for optimal treatment planning and for determining a prognosis.Multidetector computed tomography(MDCT),magnetic resonance imaging(MRI) and MR cholangiography are useful tools,both to diagnose and stage hilar cholangiocarcinoma.Modern imaging techniques allow accurate detection of the level of obstruction and the longitudinal and radial spread of the tumor.In addition,high-resolution MDCT and MR provide specific radiographic features to determine vascular involvement of anatomic structures,such as the hepatic artery or the portal vein,which are critical to decide the surgical strategy.Finally,radiological staging allows detection of patients with distant metastasis in the liver or peritoneum who will not benefit from a surgical approach. | Carlos Valls Sandra Ruiz Laura Martinez David Leiva | 2013 | World Journal of Gastrointestinal Oncology2013，5，7： | 21 |
| 20 | Multiple imaging techniques in the diagnosis of ampullary carcinoma显示文摘BACKGROUND:Ampullary carcinoma is a neoplasia with a good prognosis compared to pancreatic cancer. But it is difficult to early diagnose because it lacks clear clinical symptoms.This study aimed to evaluate the efficacy of abdominal ultrasonography(US),enhanced computed tomography(CT),magnetic resonance cholangiopancreatography(MRCP)and endoscopic retrograde cholangiopancreatography(ERCP)in detecting ampullary carcinoma. METHODS:Forty-one patients with ampullary carcinoma who had been confirmed pathologically among the inpatients at the First Affiliated Hospital of Zhejiang University School of Medicine from February 2003 to March 2007 were analyzed retrospectively.The accuracy of US,CT,MRCP and ERCP were compared in the diagnosis of ampullary carcinoma. RESULTS:The accurate rate for detection of ampullary carcinoma with US was 26.83%.The accuracy of CT and ERCP in detection of ampullary tumors was 84.62%and 100%,respectively,which were significantly higher than that of US(P<0.05).The accuracy of MRCP in detection of ampullary tumors was similar to that of US in spite of visualization of obstruction and dilatation of the pancreaticobiliary duct with MRCP. CONCLUSIONS:Because of the obscure and late onset of symptoms,ampullary carcinoma is difficult to diagnose early.Multiple imaging techniques should be carried out appropriately in order to early diagnose the disease and improve the prognosis. | Chen, Wei-Xing Xie, Qi-Gui Zhang, Wei-Fang Zhang, Xian Hu, Tian-Tian Xu, Ping Gu, Zhu-Ying | 2008 | Hepatobiliary & Pancreatic Diseases International2008，7，6： | 20 |
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