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278 results on '"El-Diasty, Tarek A."'

15. Functional MRI evaluation of blood oxygen dependent (BOLD) in renal allograft dysfunction: a prospective study.

Author

Farg, Hashim Mohamed, El-Diasty, Tarek, Ali-El-Dein, Bedeir, Refaie, Ayman, and Abou El-Ghar, Mohamed

Subjects
*FUNCTIONAL magnetic resonance imaging, *KIDNEY diseases, *OXYGEN in the blood, *LONGITUDINAL method
Abstract

Background: Blood oxygen level dependent-magnetic resonance imaging (BOLD-MRI) is a non-invasive functional imaging technique that can be used to assess renal allograft dysfunction. Purpose: To evaluate the diagnostic performance of BOLD-MRI using a 3-T scanner in discriminating causes of renal allograft dysfunction in the post-transplant period. Material and Methods: This prospective study was conducted on 112 live donor-renal allograft recipients: 53 with normal graft function, as controls; 18 with biopsy-proven acute rejection (AR); and 41 with biopsy-proven acute tubular necrosis (ATN). Multiple fast-field echo sequences were performed to obtain T2*-weighted images. Cortical R2* (CR2*) level, medullary R2* (MR2*) level, and medullary over cortical R2* ratio (MCR) were measured in all participants. Results: The mean MR2* level was significantly lower in the AR group (20.8 ± 2.8/s) compared to the normal group (24 ± 2.4/s, P <0.001) and ATN group (27.4 ± 1.7/s, P <0.001). The MCR was higher in ATN group (1.47 ± 0.18) compared to the AR group (1.18 ± 0.17) and normal functioning group (1.34 ± 0.2). Both MR2* (area under the curve [AUC] = 0.837, P <0.001) and MCR (AUC = 0.727, P = 0.003) can accurately discriminate ATN from AR, however CR2* (AUC = 0.590, P = 0.237) showed no significant difference between both groups. Conclusion: In early post-transplant renal dysfunction, BOLD-MRI is a valuable non-invasive diagnostic technique that can differentiate between AR and ATN by measuring changes in intra-renal tissue oxygenation. [ABSTRACT FROM AUTHOR]

Published
2024
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16. 68Ga-PSMA-11 PET/CT in newly diagnosed prostate cancer: diagnostic sensitivity and interobserver agreement

Author

Basha, Mohammad Abd Alkhalik, Hamed, Maged Abdel Galil, Hussein, Omar, El-Diasty, Tarek, Abdelkhalek, Yasser Ibrahim, Hussein, Yehia Omar, Alasamer, Ahmed Fathy, Mohamed, Heba A. E., Deen, Dalia Salah El, Tantawy, Engy Fathy, Metwally, Maha Ibrahim, Zaitoun, Mohamed M. A., Aly, Sameh Abdelaziz, Altohamy, Jehan Ibrahim, Mohamed, Abd El Motaleb, Afifi, Amira Hamed Mohamed, and Harb, Ola

Published
2019
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20. Goodpasture’s Disease

Author

El-Diasty, Tarek A., Abou El-Ghar, Mohamed E., Hendaoui, Lotfi, editor, Stanson, Anthony W., editor, Bouhaouala, M. Habib, editor, and Joffre, Francis, editor

Published
2012
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