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| 1 | Correlation analysis of dual-energy CT iodine maps with quantitative pulmonary perfusion MRI显示文摘AIM:To correlate dual-energy computed tomography(DECT) pulmonary angiography derived iodine maps with parameter maps of quantitative pulmonary perfusion magnetic resonance imaging(MRI).METHODS:Eighteen patients with pulmonary perfusion defects detected on DECT derived iodine maps were included in this prospective study and additionally underwent time-resolved contrast-enhanced pulmonary MRI [dynamic contrast enhanced(DCE)-MRI].DCE-MRI data were quantitatively analyzed using a pixel-by-pixel deconvolution analysis calculating regional pulmonary blood flow(PBF),pulmonary blood volume(PBV) and mean transit time(MTT) in visually normal lung parenchyma and perfusion defects.Perfusion parameterswere correlated to mean attenuation values of normal lung and perfusion defects on DECT iodine maps.Two readers rated the concordance of perfusion defects in a visual analysis using a 5-point Likert-scale(1 = no correlation,5 = excellent correlation).RESULTS:In visually normal pulmonary tissue mean DECT and MRI values were:22.6 ± 8.3 Hounsfield units(HU);PBF:58.8 ± 36.0 mL/100 mL per minute;PBV:16.6 ± 8.5 mL;MTT:17.1 ± 10.3 s.In areas with restricted perfusion mean DECT and MRI values were:4.0 ± 3.9 HU;PBF:10.3 ± 5.5 mL/100 mL per minute,PBV:5 ± 4 mL,MTT:21.6 ± 14.0 s.The differences between visually normal parenchyma and areas of restricted perfusion were statistically significant for PBF,PBV and DECT(P < 0.0001).No linear correlation was found between MRI perfusion parameters and attenuation values of DECT iodine maps(PBF:r = 0.35,P = 0.15;PBV:r = 0.34,P = 0.16;MTT:r = 0.41,P = 0.08).Visual analysis revealed a moderate correlation between perfusion defects on DECT iodine maps and the parameter maps of DCE-MRI(mean score 3.6,k 0.45).CONCLUSION:There is a moderate visual but not statistically significant correlation between DECT iodine maps and perfusion parameter maps of DCE-MRI. | Jan Hansmann Paul Apfaltrer Frank G Zoellner Thomas Henzler Mathias Meyer Gerald Weisser Stefan O Schoenberg Ulrike I Attenberger | 2013 | World Journal of Radiology2013，5，5： | 6 |
| 2 | Feasibility study of computed vs measured high b-value(1400 s/mm2) diffusion-weighted MR images of the prostate显示文摘AIM: To evaluate the impact of computed b = 1400 s/mm2(C-b1400) vs measured b = 1400 s/mm2(M-b1400) diffusion-weighted images(DWI) on lesion detection rate, image quality and quality of lesion demarcation using a modern 3T-MR system based on a small-field-of-view sequence(sFOV). METHODS: Thirty patients(PSA: 9.5 ± 8.7 ng/mL; 68 ± 12 years) referred for magnetic resonance imaging(MRI) of the prostate were enrolled in this study. All measurements were performed on a 3T MR system.For DWI, a single-shot EPI diffusion sequence(b = 0, 100, 400, 800 s/mm2) was utilized. C-b1400 was cal-culated voxelwise from the ADC and diffusion images. Additionally, M-b1400 was acquired for evaluation and comparison. Lesion detection rate and maximum lesion diameters were obtained and compared. Image quality and quality of lesion demarcation were rated accord-ing to a 5-point Likert-type scale. Ratios of lesion-to-bladder as well as prostate-to-bladder signal intensity(SI) were calculated to estimate the signal-to-noise-ratio(SNR). RESULTS: Twenty-four lesions were detected on M-b1400 images and compared to C-b1400 images. C-b1400 detected three additional cancer suspicious lesions. Overall image quality was rated significantly better and SI ratios were significantly higher on C-b1400(2.3 ± 0.8 vs 3.1 ± 1.0, P < 0.001; 5.6 ± 1.8 vs 2.8 ± 0.9, P < 0.001). Comparison of lesion size showed no significant differences between C- and M-b1400(P = 0.22). CONCLUSION: Combination of a high b-value extrap-olation and sFOV may contribute to increase diagnostic accuracy of DWI without an increase of acquisition time, which may be useful to guide targeted prostate biopsies and to improve quality of multiparametric MRI(mMRI) especially under economical aspects in a pri-vate practice setting. | Leonardo K Bittencourt Ulrike I Attenberger Daniel Lima Ralph Strecker Andre de Oliveira Stefan O Schoenberg Emerson L Gasparetto Daniel Hausmann | 2014 | World Journal of Radiology2014，6，6： | 5 |
| 3 | Influence of the oxidation state of phosphorus on the decomposition and fire behaviour of flame-retarded epoxy resin composites 显示文摘 | Ulrike B Aliaksandr I B Bernhard S | 2006 | Polymer2006，47，： | 1 |
| 4 | Generalized synthesis of periodic surfactant/inorganic composite materials显示文摘 | Huo Q Margolese D I Ulrike C | 1994 | Nature1994，368，： | 1 |
| 5 | Organization of Organic Molecules with Inorganic Molecular Species into Nanocomposite Biphase Arrays 显示文摘 | Qisheng Huo David I Margolese Ulrike Ciesla | 1994 | Chem Mater1994，6，8： | 1 |
| 6 | The effect of afforestation on water infiltration in the tropics: A systematic review and meta-analysis显示文摘 | Ulrik I Elke V | 2007 | Forest Ecology and Management2007，251，： | 1 |
| 7 | Silencing the flavonoid pathway in Medicago truncatula inhibits root nodule formation and prevents auxin transport regulation by rhizobia显示文摘 | Wasson Anton P Flavia I P Ulrike Mathesius | 2006 | The Plant Cell2006，18，： | 1 |
| 8 | Validation of the specificity and sensitivity of species-specific primers that provide a reliable molecular diagnostic for Xiphinema diversicaudatum, X index and X vuittenezi 显示文摘 | JUDITH H LILOK K ULRIKE I | 2004 | European Journal of Plant Pathology2004，110，： | 1 |
| 9 | Generalized synthesis of periodic surfactant/inorganic composite materials显示文摘 | HUO Qi-sheng DAVID I Margolese ULRIKE Ciesla | 1994 | Nature1994，368，6469： | 1 |
| 10 | Generalized Synthesis of Periodic Sur-factant/inorganic Composite Materials显示文摘 | Huo Q S Margolese D I Ulrike C | 1994 | Nature1994，368，： | 1 |
| 11 | Corporate culture and commitment impact on performance of international new product development programs显示文摘 | ULRIKE D E BRENTAN I ELKO J K | 2004 | Product Innovation Management2004，，21： | 1 |
| 12 | Generalized Synthesis of Periodic Surfactant/Inorganie Composite Materials 显示文摘 | Huo Q S Margolese D I Ulrike Clesla | 1994 | Nature1994，368，24： | 1 |
| 13 | Effects of estrogen on osteoprogenitor cells and cytokines/bone-regulatory factors in postmenopausal women显示文摘 | Ulrike I Matthew M Kelley Hoey | 2011 | Bone2011，49，： | 1 |
| 14 | The cytotoxic potential of interleukin-15-stimulated cytokine-induced killer cells against leukemia cells显示文摘 | Eva Rettinger Selim Ku?I Ivonne Naumann Petra Becker Hermann Kreyenberg Martina Anzaghe Andre Willasch Ulrike Koehl Gesine Bug Martin Ruthardt Thomas Klingebiel Simone Fulda Peter Bader | 2012 | Cytotherapy2012，，： | 1 |
| 15 | Archaeal diversity in two thermophilic chalcopyrite bioleaching reactors 显示文摘 | Mikkelsen Deirdre Kappler Ulrike Mcewan A G Sly L I | 2006 | Environmental Microbiology2006，8，11： | 1 |
| 16 | Relation of Serum Serotonin Levels to Bone Density and Structural Parameters in Women 显示文摘 | Ulrike I Modder Sara J Aehenbaeh Shreyasee Amin | 2010 | J Bone Miner Res2010，25，： | 1 |
| 17 | Relation of Serum Serotonin Levels to Bone Density and StructuralParameters in Women显示文摘 | Ulrike I Modder Sara J Achenbach Shreyasee Amin | 2010 | J Bone Miner Res2010，25，： | 1 |
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