2012-12-01T00:00:00Z, ONUR, MEHMET RUHİ, Akyol, Muammer, POYRAZ, AHMET KÜRŞAD, KOCAKOÇ, ERCAN, Ogur, Erkin, KOCAKOÇ, ERCAN

Objective: The purpose of our study was to evaluate the utility of the apparent diffusion coefficient (ADC) value measurement in the diagnosis of peritoneal metastases on diffusion weighted magnetic resonance imaging.

2012-03-01T00:00:00Z, ONUR, MEHMET RUHİ, Cicekci, Mehtap, Kayali, Alperen, POYRAZ, AHMET KÜRŞAD, KOCAKOÇ, ERCAN, KOCAKOÇ, ERCAN

Purpose: To evaluate the utility of apparent diffusion coefficient (ADC) measurement in characterization of focal solid hepatic lesions and determine the role of ADC values in differentiation of solid benign and solid malignant hepatic lesions.

2013-03-01T00:00:00Z, POYRAZ, AHMET KÜRŞAD, FIRDOLAŞ, FATİH, ONUR, MEHMET RUHİ, KOCAKOÇ, ERCAN, KOCAKOÇ, ERCAN

Background: Nutcracker syndrome, also called left renal vein entrapment syndrome, is a cause of non-glomerular hematuria with difficulties in diagnosis. Multidetector computed tomography (MDCT) is a powerful tool to prevent unnecessary diagnostic procedures.

2012-05-01T00:00:00Z, POYRAZ, AHMET KÜRŞAD, ONUR, MEHMET RUHİ, KOCAKOÇ, ERCAN, Ogur, Erkin, KOCAKOÇ, ERCAN

Purpose: To investigate the effect of fat infiltration on the apparent diffusion coefficient (ADC) of liver, and assess the relationship between ADC and hepatic fat fraction (HFF). Materials and Methods: MRI scans of 120 consecutive patients were included in this retrospective study. Of these, 42 patients were included in the fatty liver group and 78 in the control group. ADC values were measured from a pair of diffusion-weighted (DW) images (b 0 mm(2)/s and 1000 mm(2)/s). HFFs were measured using T1W GRE dual-echo images. The difference between the ADCs of the two groups was assessed with the t-test. The relationship between HFF and ADC was determined using linear regression analysis and the Pearson correlation coefficient (r). Results: Mean HFFs were 0.85 +/- 2.86 and 13.67 +/- 8.62 in the control and fatty liver groups, respectively. The mean ADC of fatty liver group 1.20 +/- 0.22 x 10 (-3) mm (2)/s was significantly lower than that of the control group 1.32 6 0.23 x 10(-3) mm (2)/s (P = 0.02). Linear regression analysis revealed an inverse relationship between ADC and HFF (r = 0.39, P 5% HFF, and ADC and HFF exhibit an inverse relationship. Key Words: MRI; diffusion-weighted; fatty liver; imaging; chemical shift J. Magn. Reson. Imaging 2012; 35: 1108-1111. (C) 2011 Wiley Periodicals, Inc.

2012-11-01T00:00:00Z, Turkoglu, Huseyin, ONUR, MEHMET RUHİ, POYRAZ, AHMET KÜRŞAD, KOCAKOÇ, ERCAN, KOCAKOÇ, ERCAN

To determine the utility of different contrast enhancement phases (unenhanced, arterial, and venous), slice thicknesses (0.5, 3, and 5 mm), and planes (axial and coronal) in the evaluation of appendix vermiformis (AV) on multidetector computed tomography (MDCT), CT examinations of 600 patients were obtained. No significant difference was found between the different imaging planes, slice thicknesses, and contrast enhancement phases in terms of detection rates of AV. The mean diameter of AV in the axial plane (5.93 +/- 0.06 mm) was significantly lower than that in the coronal plane (6.18 +/- 0.06 mm). Evaluation of AV on MDCT is enhanced by combined interpretation on axial and coronal planes. (C) 2012 Elsevier Inc. All rights reserved.