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| 1 | Real time endoscopic ultrasound elastography and strain ratio in the diagnosis of solid pancreatic lesions显示文摘AIM To evaluate the accuracy of the elastography score combined to the strain ratio in the diagnosis of solid pancreatic lesions(SPL). METHODS A total of 172 patients with SPL identified by endoscopic ultrasound were enrolled in the study to evaluate the efficacy of elastography and strain ratio in differentiating malignant from benign lesions. The semi quantitative score of elastography was represented by the strain ratio method. Two areas were selected, area(A) representing the region of interest and area(B) representing the normal area. Area(B) was then divided by area(A). Sensitivity, specificity, positive predictive value(PPV), negative predictive value(NPV), and accuracy were calculated by comparing diagnoses made by elastography, strain ratio and final diagnoses.RESULTS SPL were shown to be benign in 49 patients and malignant in 123 patients. Elastography alone had a sensitivity of 99%, a specificity of 63%, and an accuracy of 88%, a PPV of 87% and an NPV of 96%. The best cut-off level of strain ratio to obtain the maximal area under the curve was 7.8 with a sensitivity of 92%, specificity of 77%, PPV of 91%, NPV of 80% and an accuracy of 88%. Another estimated cut off strain ratio level of 3.8 had a higher sensitivity of 99% and NPV of 96%, but with less specificity, PPV and accuracy 53%, 84% and 86%, respectively. Adding both elastography to strain ratio resulted in a sensitivity of 98%, specificity of 77%, PPV of 91%, NPV of 95% and accuracy of 92% for the diagnosis of SPL. CONCLUSION Combining elastography to strain ratio increases the accuracy of the differentiation of benign from malignant SPL. | Hussein Okasha Shaimaa Elkholy Ramy El-Sayed Mohamed-Naguib Wifi Mohamed El-Nady Walid El-Nabawi Waleed A El-Dayem Mohamed I Radwan Ali Farag Yahya El-sherif Emad Al-Gemeie Ahmed Salman Mohamed El-Sherbiny Ahmed El-Mazny Reem E Mahdy | 2017 | World Journal of Gastroenterology2017，23，32： | 11 |
| 2 | Optimal investment planning for distributed generation in a competitive electricity market显示文摘 | WALID E K KANKAR B YASSER H | 2004 | IEEE Transactions on Power Systems2004，19，3： | 1 |
| 3 | Antioxidant capacities of phenolic compounds and tocopherols from tunisian pomegranate (Punica granatum ) fruits显示文摘 | Walid E Nizar T Nizar N | 2011 | Journal of Food Science2011，76，5： | 1 |
| 4 | Cerebellar anaplastic astrocytoma in a teenager with Ollier Disease显示文摘 | Walid M S Troup E C | 2008 | J Neurooncol2008，89，1： | 1 |
| 5 | Trade, foreign direct investment, and R&D spillovers 显示文摘 | Walid H Safarian A E | 1999 | Journal of International Business Studies1999，30，3： | 1 |
| 6 | The caper(Capparis):Ethnopharmacology,phytochemical and pharmacological properties显示文摘 | Nizar T Walid E Ezzeddine S | | 0，，： | 1 |
| 7 | A new perspective for the IEEE standard 1459- 2000 via stationary wavelet transform in the presence of nonstationary power quality disturbance 显示文摘 | Walid G M EI-Hawary M E | 2008 | IEEE Trans on Power Delivery2008，23，4： | 1 |
| 8 | Social networks of author coauthor relationships 显示文摘 | SAID Y H WEGMAN E J WALID K | 2007 | Computational Statistics & Data Analysis2007，，52： | 1 |
| 9 | Antioxidan! capacities of phenolic compounds and tocopherols from Tunisian Pomegranate (Punica granatum) Fruits显示文摘 | Walid E Nizar T Nizar N | 2011 | J Food Sci2011，76，5： | 1 |
| 10 | Expression profile of CBF- like transcriptional factor genes from Eucalyptus in response to cold显示文摘 | WALID E K MARIE N GILLES M | 2006 | J Exp Bot2006，57，10： | 1 |
| 11 | Simulation of THM species in water distribution systems显示文摘 | WALID E E HANY ABU- QDAIS MOHAMMED K E | 2000 | Water Research2000，34，13： | 1 |
| 12 | Trends in the burden of infectious disease hospitalizations among the elderly in the last decade显示文摘 | Walid S Anna F Hana E | 2013 | Eur J Intern Med2013，24，6： | 1 |
| 13 | Changes in an insecticide resistant field population of German cockroach(Dictyoptera; Blattellidae)after exposure to an insecticide mixture 显示文摘 | MICHAEL E S WALID K | 1997 | J Econ Entomol1997，90，1： | 1 |
| 14 | Antioxidant capacities of phenolic compounds and tocopherols from tunisian pomegranate (Punica granatum) fruits显示文摘 | Walid E Nizar T Nizar N | 2011 | Journal of Food Science2011，76，5： | 1 |
| 15 | Fuzzy-wavelet-based electric power quality assessment of distribution systems under stationary and nonstationary disturbances 显示文摘 | ] WALID G M EL-HAWARY M E | 2009 | IEEE Transactions on Power Delivery2009，24，4： | 1 |
| 16 | Incremental,online,and merge mining of partial periodic patterns in time-series databases显示文摘 | WALID G A MOHAMED G E | 2004 | IEEE Trans on Knowledge and Data Engineering2004，16，2： | 1 |
| 17 | Periodicity detection in time series databases显示文摘 | MOHAMED G E WALID G | 2005 | IEEE Trans on Knowledge and Data Engineering2005，17，7： | 1 |
| 18 | Mutations in the beta propeller WDR72 cause autosomal-recessive hypomatura- tion amelogenesis imperfecta显示文摘 | Walid E S David A P Roger C S | 2009 | The American Journal of Hu- man Genetics2009，12，13： | 1 |
| 19 | Simulation of the species in water distribution systems显示文摘 | Walid E E Hany A Q Mohammed K E | 2000 | Wat Res2000，34，13： | 1 |
| 20 | An Integrated Distributed Generation Optimization Model for Disuibution System Planning显示文摘 | Walid E I-rattam Hegazy Y G Salama M M A | | 0，，02： | 1 |
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