Tıp Fakültesi / Faculty of Medicine
Permanent URI for this collectionhttps://hdl.handle.net/11727/1403
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Item Body Mass Index, Cholecystitis, Cholelithiasis, Pancreatitis and Imaging of Common Bile Duct Stones(2014) Coban, Gokcen; Yildirim, Erkan; Gokturk, Savas; Caliskan, Zuhal; Turk, Emin; Akcil, Mehtap; https://orcid.org/0000-0002-4010-2883; https://orcid.org/0000-0002-9057-722X; https://orcid.org/0000-0003-4766-3373; 23838577; P-7533-2014; ABI-3856-2020; AAJ-5609-2021Purpose:Studies to date have not investigated whether body mass index (BMI) affects the sensitivity and specificity of magnetic resonance cholangiopancreatography (MRCP). The purpose of this study was to investigate the effect of BMI and also concomitant pancreatitis, cholecystitis and cholelithiasis on the sensitivity and specificity of MRCP.Materials and Methods:Between January 2004 and December 2011, 185 patients were included in the study and divided into 3 groups according to BMI as normal, overweight or obese. Both MRCP and endoscopic retrograde cholangiopancreatography (ERCP) were performed in all patients. ERCP was accepted as the gold standard. The accuracy, sensitivity and specificity values of the 3 groups were calculated to determine any effects on the results of the MRCP.Results:Before separating into groups according to BMI, the statistical results for MRCP in the detection of stone disease were as follows: specificity 74.3%, sensitivity 81.7% and accuracy 79%. After dividing the patients into 3 groups according to BMI, the specificity of stone detection with MRCP in the normal-weight group was 93.8% but decreased to 65.5% in the overweight group and to 72% in the obese group. The sensitivity of stone detection with MRCP in the normal-weight group was 85.2% but decreased to 75% in the overweight group and increased to 88.9% in the obese group. The accuracy was 88.3% in the normal-weight group but decreased to 71.6% in the overweight group and to 81.9% in the obese group.Conclusion:Our study showed that MRCP performance was decreased in the overweight and obese groups.Item The Diagnostic Value of Magnetic Resonance Urography Using A Balanced Turbo Field Echo Sequence(2016) Cifci, Egemen; Coban, Gokcen; Cicek, Tufan; Gonulalan, Umut; 26984432The aim of the study was to compare the inter-observer variability and the accuracy of magnetic resonance urography (MRU) using a thin sectional balanced-turbo field echo (B-TFE) sequence for detecting ureteral calculi and to determine the effect of additional factors (size, density and location of the calculus) on the sensitivity and specificity of the MRU. MRU and CT images were evaluated independently by two radiologists according to presence, density and localization of calculi. The degrees of inter-rater agreement for categorical items were evaluated by the Kappa coefficient. According to the 1st and 2nd observers, the sensitivity of MRU was 65.9 %, 71.8 % and the specificity of MRU was 95.9 %, 100 %, respectively. Inter-observer agreement was 84.6 % for stone detection. The larger size had a better effect on detectability (p < 0.05). Also, the higher density had a better impact on detectability (p < 0.05). Our study has shown that B-TFE MRU was useful to detect ureteral calculi. However, B-TFE MRU has low sensitivity and high specificity in comparison with CT images. MRU is a reasonable alternative imaging technique for follow-up periods of selective groups like patients with large urinary stones, children or pregnant patients when ionizing radiation is undesirable. aEuro cent According to 1st and 2nd observers, sensitivity of MRU was 65.9 %, 71.8 %, respectively. aEuro cent According to 1st and 2nd observers, MRU specificity was 95.9 %, 100 %, respectively. aEuro cent Interobserver agreement was found to be over 84 % for stone detection. aEuro cent B-TFE sequence provides calculus follow-up without radiation. aEuro cent Larger calculi and more dense calculi individually have the better effect on detectability.