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Now showing 1 - 10 of 16
  • PublicationMetadata only
    Gastrointestinal Sistem Perforasyonu Olan Olgularda Bilgisayarlı Tomografi İncelemesinde Aksiyal ve Koronal Reformat Görüntülerin Tanıya Katkısı
  • PublicationMetadata only
    Supposed to be rare cause of intestinal obstruction; abdominal cocoon: report of two cases
    (2013-05-01T00:00:00Z) Serter, Asli; KOCAKOÇ, ERCAN; Cipe, Gokhan; KOCAKOÇ, ERCAN
    Abdominal cocoon, or sclerosing encapsulating peritonitis, is supposed to be rare cause of intestinal obstruction. It is characterized by totally or partially encasement of small bowel with a thick, fibrotic, cocoon-like membrane. We think this entity is not rare as previously thought. We reported two case-s clinical and imaging findings which diagnosed abdominal cocoon by surgery to increase awareness of this diagnosis. (C) 2013 Elsevier Inc. All rights reserved.
  • PublicationMetadata only
    A rare cause of hydronephrosis: entrapment effect of giant iliac artery aneurysm
    (2013-09-01T00:00:00Z) SHARIFOV, RASUL; Atay, Musa; Yetis, Huseyin; KOCAKOÇ, ERCAN; SHARIFOV, RASUL; KOCAKOÇ, ERCAN
  • PublicationMetadata only
    The role of apparent diffusion coefficient values in differentiation between adrenal masses
    (2014-03-01T00:00:00Z) Cicekci, Mehtap; ONUR, MEHMET RUHİ; Aydin, Ayse Murat; Gul, Yeliz; ÖZKAN, YUSUF; AKPOLAT, NUSRET; KOCAKOÇ, ERCAN; KOCAKOÇ, ERCAN
    The aim of this study was to evaluate the utility of apparent diffusion coefficient (ADC) values in differentiation between solid adrenal masses. The ADC values of 73 adrenal lesions (54 benign, 19 malignant) in 69 patients were measured at b 100, 600 and 1000 gradients on diffusion-weighted magnetic resonance imaging (DW-MRI). No statistically significant difference was found between ADC values of benign and malignant adrenal masses, nonadenomatous benign adrenal masses and malignant adrenal masses, adrenal adenomas and nonadenomatous lesions, adenomas and metastases, adenomas and pheochromocytomas, metastases and pheochromocytomas. ADC values are not helpful in the differentiation between solid adrenal masses. (C) 2014 Elsevier Inc. All rights reserved.
  • PublicationOpen Access
    Assessment of Liver Fibrosis with Diffusion-Weighted Magnetic Resonance Imaging Using Different b-values in Chronic Viral Hepatitis
    (2015-01-01T00:00:00Z) KOCAKOÇ, ERCAN; Bakan, Ayse Ahsen; Poyrazoglu, Orhan Kursat; Dagli, Adile Ferda; Gul, Yeliz; Cicekci, Mehtap; BAHÇECİOĞLU, İBRAHİM HALİL; KOCAKOÇ, ERCAN
    Objective: To examine the effectiveness of apparent diffusion coefficient (ADC) values and to compare the reliability of different b-values in detecting and identifying significant liver fibrosis. Subjects and Methods: There were 44 patients with chronic viral hepatitis (CVH) in the study group and 30 healthy participants in the control group. Diffusion-weighted magnetic resonance imaging (DWI) was performed before the liver biopsy in patients with CVH. The values of ADC were measured with 3 different b-values (100, 600, 1,000 s/mm(2)). In addition, liver fibrosis was classified using the modified Ishak scoring system. Liver fibrosis stages and ADC values were compared using areas under the receiver-operating characteristic (ROC) curve. Results: The study group-s mean ADC value was not statistically significantly different from the control group-s mean ADC value at b = 100 s/mm(2) (3.69 +/- 0.5 x 10(-3) vs. 3.7 +/- 0.3 x 10(-3) mm(2)/s) and b = 600 s/mm(2) (2.40 +/- 0.3 x 10(-3) vs. 2.5 +/- 0.5 x 10(-3) mm(2)/s). However, the study group-s mean ADC value (0.99 +/- 0.3 x 10(-3) mm(2)/s) was significantly lower than that of the control group (1.2 +/- 0.1 x 10(-3) mm(2)/s) at b = 1,000 s/mm(2). With b = 1,000 s/mm(2) and the cutoff ADC value of 0.0011 mm(2)/s for the diagnosis of liver fibrosis, the mean area under the ROC curve was 0.702 +/- 0.07 (p = 0.0015). For b = 1,000 s/mm(2) and the cutoff ADC value of 0.0011 mm(2)/s to diagnose significant liver fibrosis (Ishak score = 3), the mean area under the ROC curve was 0.759 +/- 0.07 (p = 0.0001). Conclusion: Measurement of ADC values by DWI was effective in detecting liver fibrosis and accurately identifying significant liver fibrosis when a b-value of 1,000 s/mm(2) was used. (C) 2015 S. Karger AG, Basel
  • PublicationMetadata only
    Utility of ADC measurement on diffusion-weighted MRI in differentiation of prostate cancer, normal prostate and prostatitis
    To determine the utility of apparent diffusion coefficient (ADC) values in differentiation of prostate cancer from normal prostate parenchyma and prostatitis we obtained ADC values of 50 patients at b 100, 600 and 1,000 s/mm(2) diffusion gradients. The ADC values of prostate cancer group were significantly lower than normal prostate and prostatitis group at b 600 and 1,000 s/mm(2) gradients. The ADC values at high diffusion gradients may be used in differentiation prostate cancer from normal prostate and prostatitis.
  • PublicationMetadata only
    Doppler ultrasonography and magnetic resonance imaging findings of testicular adrenal rest tissue in a patient with 11 beta hydroxylase deficiency. Case report
    (2014-12-01T00:00:00Z) Ahmad, Issam Cheikh; YILMAZ, Temel Fatih; KOCAKOÇ, ERCAN; YILMAZ, TEMEL FATİH; KOCAKOÇ, ERCAN
    Benign intratesticular lesions are rare; thus, radiological diagnosis is important to avoid unnecessary surgical intervention. Testicular adrenal rest tumors (TART) are the nodular testicular lesions deriving from the adrenal remnant tissue reported in patients with congenital adrenal hyperplasia. We present ultrasonographic (US) and magnetic resonance imaging (MRI) findings of intratesticular adrenal rests in a 16-year-old patient with 11 beta hydroxylase deficiency. Scrotal ultrasonography demonstrated bilateral heterogenous hypoechoic lesions located around mediastinum testis and highly vascularized on powerDoppler US. On MRI the lesions were hyperintense on T1-weighted and hypointense on T2-weighted images and enhanced brightly on post-contrast images.
  • PublicationMetadata only
    An unusual liver mass: primary malignant mesothelioma of the liver
    (2015-02-01T00:00:00Z) Serter, Asli; BÜYÜKPINARBAŞILI, NUR; Karatepe, Oguzhan; KOCAKOÇ, ERCAN; BÜYÜKPINARBAŞILI, NUR; KOCAKOÇ, ERCAN
    Primary malignant mesothelioma of the liver is extremely rare, and radiologic features have been defined in only one case. We present radiologic findings of two cases which are pathologically proven as primary malignant mesothelioma of the liver. Malignant mesothelioma of the liver may be included in a differential diagnosis list if there is a heterogeneous, hemorrhagic and necrotic lesion in the liver, with peripheral serpiginous vascular structures and increasing septal enhancement in post-contrast images.
  • PublicationMetadata only
    Diagnosis of Peritoneal Metastases with Abdominal Malignancies: Role of ADC Measurement on Diffusion Weighted MRI
    (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.
  • PublicationMetadata only
    Evaluation of left renal vein entrapment using multidetector computed tomography
    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.