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Öğe Diagnostic accuracy and effective radiation dose of high pitch dual source multidetector computed tomography in evaluation of coronary artery bypass graft patency(SPRINGER WIEN, 2016) Koplay, Mustafa; Guneyli, Serkan; Akbayrak, Hakan; Demir, Kenan; Sivri, Mesut; Avci, Ahmet; Erdogan, HasanThe aim of the study was to evaluate the diagnostic accuracy and effective radiation dose (ERD) of high pitch dual source multidetector computed tomography (MDCT) for coronary artery bypass graft (CABG) patency. Fourty-five patients who underwent 128 x 2aEuroslice MDCT angiography with a prospective electrocardiogram-triggering, low-dose, high pitch, dual source, flash spiral acquisition mode after CABG surgery were included in the study. The interobserver agreement of the image quality was evaluated with Cohen kappa value. The image quality was compared to the heart rates (HRs) using Mann-Whitney U test and to the graft segments using chi(2) test. The findings for the CABG patency on MDCT were compared to those determined on catheter coronary angiography. Dose-length product (DLP) and ERD were compared to the gender, HRs, and body mass index (BMI) of the patients using Kruskall Wallis and Mann-Whitney U tests. A total of 110 grafts and 330 vessel segments were evaluated with a good interobserver agreement (kappa = 0.80). The image quality was better in proximal and middle graft segments (p < 0.05), as well as in the patients with low HRs (p < 0.05). High pitch MDCT had the following sensitivity, specificity, positive predictive value, negative predictive value, and diagnostic accuracy for evaluation of graft patency: 92.8, 99.3, 92.8, 99.3 and 98.8 %, respectively. ERD was correlated to the HRs and BMI. High pitch 128 x 2aEuroslice dual source CT angiography is a noninvasive imaging modality, and it can be safely and effectively used in evaluation of CABG patency with lower radiation dose.Öğe Diagnostic efficacy of diffusion-weighted MRI for pre-operative assessment of myometrial and cervical invasion and pelvic lymph node metastasis in endometrial carcinoma(WILEY-BLACKWELL, 2014) Koplay, Mustafa; Dogan, Nasuh Utku; Erdogan, Hasan; Sivri, Mesut; Erol, Cengiz; Nayman, Alaaddin; Karabagli, PinarIntroduction: To determine the diagnostic accuracy of diffusion-weighted magnetic resonance imaging (DW-MRI) for the pre-operative assessment of patients with endometrial carcinoma and to assess myometrial and cervical invasion as well as pelvic lymph node metastasis. Methods: Fifty-eight women who underwent surgery for histopathologically confirmed endometrial carcinoma were included in the current study. Prior to surgery, patients were evaluated using pelvic DW-MRI and gadolinium-enhanced T1-weighted imaging (Gd-T1WI). Gd-T1WI was evaluated together with T2-weighted images. DW-MR images were obtained in the axial plane using echo-planar spin-echo pulse sequences with different b factors. Endometrial carcinomas were observed as areas of increased intensity on DW-MRI images, and their intensity was compared with the surrounding hypo-intense myometrium. Pre-operative DW-MRI and Gd-T1WI results were compared with post-operative histopathological findings that served as reference standards. Results: The sensitivity, specificity, positive (PPV) and negative predictive values (NPV), and diagnostic accuracy of DW-MRI for differentiation between superficial myometrial invasion and deep myometrial invasion were 85%, 89%, 81%, 92% and 88%, respectively. The sensitivity, specificity and diagnostic accuracy rates were 82%, 91% and 89.6% for cervical invasion and 100%, 96% and 96.5% for pelvic lymph node metastasis, respectively. The sensitivity, specificity, PPV and NPV, and diagnostic accuracy of Gd-T1WI for differentiation between superficial myometrial invasion and deep myometrial invasion were 85%, 81.5%, 71%, 91% and 83%, respectively. The sensitivity, specificity and diagnostic accuracy were 73%, 89% and 86% for cervical invasion, respectively. Conclusions: These findings suggest that DW-MRI may be a good diagnostic tool with high sensitivity and specificity for assessing myometrial invasion and detecting tumour extension. We suggest that DW-MRI should be considered as a routine part of the pre-operative pelvic MRI in all patients with endometrial carcinoma.Öğe Ectopic Pregnancy in a Cesarean Section Scar: Successful Management Using Vacuum Aspiration under Laparoscopic Supervision-Mini Review of Current Literature(HINDAWI LTD, 2016) Koplay, Mustafa; Dogan, Nasuh Utku; Sivri, Mesut; Erdogan, Hasan; Dogan, Selen; Celik, CetinA cesarean scar ectopic pregnancy (CSEP) is a fairly uncommon presentation wherein the conceptus is implanted deep in the myometrium and at the exact scar site of the previous cesarean section. There are various CSEP management options that range from medical treatment to surgical interventions such as dilatation and curettage, laparoscopic excision, resection by laparotomy, or, sometimes, a combination of these modalities. Establishing a diagnosis of CSEP can be challenging. Given the relatively rare incidence of CSEP, its management is controversial and current standards of therapy have been derived from data obtained from a limited number of patients. Herein, we present transvaginal ultrasonography (TVUS) imaging findings and management strategies used in a case of CSEP along with the short review of current literature.Öğe Importance of imaging and recent developments in diagnosis of nonalcoholic fatty liver disease(BAISHIDENG PUBLISHING GROUP INC, 2015) Koplay, Mustafa; Sivri, Mesut; Erdogan, Hasan; Nayman, AlaaddinNonalcoholic fatty liver disease (NAFLD) is one of the most common causes of chronic liver disease and is a major public health problem worldwide. It is a spectrum that includes simple steatosis, nonalcoholic steatohepatitis (NASH), fibrosis and cirrhosis. Recently, NAFLD prevalence in children and adolescents has increased too. The increasing prevalence has resulted in NASH-related chronic liver disease. Therefore, early diagnosis and treatment is quite important. Although liver biopsy is still the gold standard for diagnosis and staging of NAFLD, particularly for the diagnosis of NASH, imaging methods such as ultrasonography, computed tomography, magnetic resonance imaging with chemical shift imaging and especially magnetic resonance spectroscopy and elastography have been increasingly approved as noninvasive alternative methods. The aim of this review is to analyze the diagnostic accuracy and limitations of the imaging methods and recent developments in the diagnosis of NAFLD.Öğe In vivo analysis of urinary stones with dual-energy computed tomography(LIPPINCOTT WILLIAMS & WILKINS, 2019) Erdogan, Hasan; Temizoz, Osman; Koplay, Mustafa; Ozturk, BahadirObjective Formation mechanisms and treatment of the urinary stones are different, depending on their chemical structure. Therefore, determining the stone type plays a key role in planning treatment and preventive measures. Computed tomography (CT), with the use of dual-energy technology in recent years, has made it possible to do in vivo analysis of urinary stones. In this study, we aimed to evaluate the diagnostic efficacy of dual-energy CT (DECT) and compare its results with in vitro analysis, which is accepted as a gold standard for analysis of urinary stones. Materials and Methods The DECT examinations were performed on 373 patients using 128-slice dual-source CT scanner. Analysis of attenuation ratios in the high and low kilovoltage peak values of the stone was performed at workstation, and stones were classified as hydroxyapatite, calcium oxalate, cystine, and uric acid. On follow-up, the stone was obtained in 35 patients as a result of surgery or passed spontaneously. The DECT analysis and in vitro analysis results were compared and statistically evaluated. Results In all patients, 136 hydroxyapatite, 160 calcium oxalate, 57 uric acid, and 20 cystine stones were detected with DECT. In vitro analyses of the stones were performed in 35 patients, and 8 hydroxyapatite, 18 calcium oxalate, 6 uric acid, and 3 cystine stones were revealed. When DECT analysis results were compared with in vitro analysis results, stone types were detected correctly in 32 (91.4%) patients and incorrectly in 3 (8.6%) patients. Especially all uric acid and cystine stones were correctly detected with DECT. Conclusions With advanced postprocess analysis methods, DECT is able to analyze urinary stones. The DECT is found superior especially in detecting uric acid and cystine stones. Its success in detecting hydroxyapatite and calcium oxalate stones is also high. When in vivo analyses of the stones are performed with DECT, it will be possible to make a contribution to the personalization and optimization of the treatment.Öğe Intradural extramedullary spinal hydatid cyst causing bone destruction(ELSEVIER SCIENCE INC, 2015) Koplay, Mustafa; Sivri, Mesut; Erdogan, Hasan; Nayman, Alaaddin[Abstract not Available]Öğe Intrahepatic Portal Vein Aneurysm : An Unusual Entity(UNIV CATHOLIQUE LOUVAIN-UCL, 2016) Nayman, Alaaddin; Guler, Ibrahim; Koplay, Mustafa; Erdogan, Hasan; Cebeci, Hakan[Abstract not Available]Öğe Neuro-Behcet disease presenting with spinal cord involvement as sudden onset hypesthesia at hand(ELSEVIER SCIENCE INC, 2015) Sivri, Mesut; Koplay, Mustafa; Erdogan, Hasan; Kelesoglu, Kazim Serhan[Abstract not Available]Öğe A rare cause of back pain: simple bone cyst in the lumbar vertebra(ELSEVIER SCIENCE INC, 2015) Nayman, Alaaddin; Guler, Ibrahim; Erdogan, Hasan; Koplay, Mustafa[Abstract not Available]Öğe A rare cause of spinal mass: primary intramedullary spinal cord lymphoma(ELSEVIER SCIENCE INC, 2015) Sivri, Mesut; Erdogan, Hasan; Allahverdiyev, Ilgar; Koplay, Mustafa; Temizoez, Osman[Abstract not Available]Öğe Solitary Langerhans cell histiocytosis of the cavernous sinus with orbital extension in an adult(SPRINGER HEIDELBERG, 2016) Guler, Ibrahim; Sivri, Mesut; Nayman, Alaaddin; Erdogan, Hasan; Paksoy, Yahya[Abstract not Available]Öğe An unusual cause of chronic abdominal pain in a child: thoracic spinal dermoid cyst(ELSEVIER SCIENCE INC, 2015) Koplay, Mustafa; Sivri, Mesut; Nayman, Alaaddin; Kelesoglu, Kazim Serhan; Erdogan, Hasan[Abstract not Available]Öğe Unusual reason of abdominal pain in a young female patient(UNIV CATHOLIQUE LOUVAIN-UCL, 2016) Koplay, Mustafa; Kelesoglu, Kazim Serhan; Sivri, Mesut; Erdogan, Hasan; Alptekin, Husnu[Abstract not Available]Öğe Unusual reason of spinal cord infarction: tuberculous meningitis(SPRINGER HEIDELBERG, 2016) Koplay, Mustafa; Erdogan, Hasan; Sivri, Mesut; Nayman, Alaaddin; Paksoy, Yahya[Abstract not Available]