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Öğe Analysis in terms of gender of morphometric characteristics of typical cervical vertebrae: A radiological study(2018) Özbağ, Davut; Çetin, Aymelek; Şenol, Deniz; Karaca, Leyla; Çevirgen, FurkanAbstract: The objective of this study is to examine the morphometric characteristics of C3-C6 vertebrae in the cervical region through radiological images and to find out how they differ in terms of gender. CT images of 27 men and 27 women between the ages of 18 and 40 who did not have any symptoms were included in the study. In the study, area of vertebra (AV), vertebral foramen (VF), right and left transvers foramen (RTF-LTF) areas, lateral diameter of vertebral foramen (VF-L) and anterior-posterior diameter of vertebral foramen (VF-AP) of 216 cervical typical vertebrae (C3-C6) were measured through radiological images. No statistically significant results were found between AV, VF, VF-L, VF-AP, RTF and LTF radiological measurements taken from the C3, C4, C5 and C6 vertebrae of men and women for the same vertebral levels and between the rates of VF, RTF and LTF areas covered in AV (p>0.05). Paired comparisons of vertebrae were conducted with independent samples t test. Statistically significant difference was found in VF-L in men between C3 and C5, in VF-L and LTF between C3 and C6 and in AV, RTF and LTF between C4 and C6; while AV and LTF were found to be statistically significant in women between C4 and C6 (p<0.05). We believe that knowing the radiological measurement values of AV, VF, RTF-LTF, VF-L and VF-AP in typical cervical vertebrae will be very important and instructive for clinicians who have a role in conducting surgical interventions to this area.Öğe A Comparison of Dual-Energy CT with MRI in the Detection of Traumatic Bone Marrow Edema in Distal Extremity Bones(Erciyes Univ Sch Medicine, 2023) Kaya, Ahmet Turan; Ozdemir, Zeynep Maras; Erbay, Mehmet Fatih; Kahraman, Aysgul Sagir; Karaca, Leyla; Karakaplan, Mustafa; Gurbuz, SukruObjective: Our objective was to evaluate the performance of dual-energy computed tomography (DECT) in detecting post-traumatic bone marrow edema (BME) in distal extremities.Materials and Methods: We prospectively studied 31 consecutive patients (25 males) who presented within the first four weeks following distal extremity traumas (wrist, n=19; ankle, n=14) (protocol number: 2017/74). All patients underwent DECT and magnetic resonance imaging (MRI) within three days of presentation. Two independent radiologists analyzed DECT images for fractures and BME qualitatively. Computed tomography (CT) numbers on Virtual non-calcium (VNCa) images were obtained in both edematous and non-edematous areas for quantitative consensus assessment. We used MRI as a reference standard. Results: MRI identified BME in 56/71 bones (78.9%). The rates of BME detection on CT compared to MRI at the patient level were found to be statistically significantly lower, ex-cept for individuals over 40 years of age, women, those with 7-30 days between trauma and admission, and those with CT-detected fractures (p<0.05). The rates of BME detection on CT at the bone level, compared to MRI, were found to be statistically significantly lower (p<0.01), except for women and those with fractures detected on CT. The interobserver agreement for the qualitative analysis of BME was fair (kappa=0.407 and p<0.001). DECT's diagnostic accuracy rates in predicting BME were significantly higher in patients with fractures (p=0.028). CT numbers in edematous areas were significantly higher than in non-edematous areas (p<0.001).Conclusion: DECT may serve as an alternative for detecting post-traumatic BME in distal extremity bones. However, in our heterogeneous bone sample group, it exhibited low sensitivity and a low negative predictive value.Öğe COMPARISON OF TVUS, MRI, AND FROZEN SECTION METHODS IN PREOPERATIVE DETECTION OF MYOMETRIAL INVASION IN PATIENTS WITH ENDOMETRIAL CANCER(Sestre Milosrdnice Univ Hospital, 2021) Kural, Hasim; Yilmaz, Ercan; Melekoglu, Rauf; Akatli, Aysenur; Karaca, LeylaWe aimed to evaluate the depth of myometrial invasion preoperatively with trans vaginal ultrasound, magnetic resonance imaging, and frozen section examination techniques in patients diagnosed with endometrial cancer. Our study included 65 patients. Transvaginal ultrasound and magnetic resonance imaging were performed in study patients in the preoperative period. Frozen section examination was performed in all hysterectomy samples obtained from all study patients. Data were analyzed with SPSS Statistics 22.0 program. The sensitivity of transvaginal ultrasound in determining the depth of myometrial invasion was 88.64%, specificity 90.48%, positive predictive value 95.12%, and negative predictive value 79.17%. For magnetic resonance imaging, the sensitivity was 63.64%, specificity 95.24%, positive predictive value 96.55%, and negative predictive value 55.56%. In addition to the frozen section examination, which is the gold standard in determining the myometrial invasion depth, transvaginal ultrasound and magnetic resonance imaging have become commonly used methods for this purpose in recent years. Ultrasound examination performed by an experienced specialist is superior to magnetic resonance imaging as it is fast, inexpensive, and associated with higher sensitivity.Öğe The evaluation of agreement between the measurement methods used in the diagnosis of prostate cancer with the statistical methods(2024) Yaşar, Şeyma; Yoloğlu, Saim; Altıntaş, Ramazan; Akatlı, Ayşe Nur; Karaca, LeylaThe aim of this study is to evaluate the compatibility of the "Computed Tomography (CT)" and "Magnetic Resonance (MR)" methods which are imaging techniques used to describe prostate cancer with the pathology accepted as the reference method. In this study, the concordance between CT and MR results and pathology results of 37 prostate cancer patients was evaluated using the Bland-Altman, Interclass Correlation Coefficient, Concordance Correlation Coefficient, Deming Regression and Passing-Bablok method comparison methods. Inter-class correlation coefficient and Concordance Correlation Coefficient values for CT-Pathology results were 0.62 and 0.62, respectively. Inter-class correlation coefficient and Concordance Correlation Coefficient values for MR-Pathology results were 0.74 and 0.75, respectively. The regression equation for the Deming regression method is y=-6.21+1.03x for CT-Pathology, whereas for the MR-Pathology y=-6.86+1.11x. When the CT-Pathology measurement values are evaluated by the Bland-Altman statistical method, the mean values of the measurement differences are -2.42 and the standard deviation is 33.50. When the agreement between MR-Pathology measurement values is examined by the Bland-Altman method, the mean values for the difference between the measurement values are 4.14 and the standard deviation is 26.78. Among the applied methods, the Bland-Altman method is the most suitable method for data structure. According to the results of the Bland-Altman method, the tumor size obtained by the pathology method can be found to be 2.4 smaller than the mean values obtained from the CT results and an average of 4.1 cc from the measurement values obtained by the MR imaging technique.Öğe Neurofibromas of the bladder in a child with neurofibromatosis type 1(Brazilian Soc Urol, 2018) Dogan, Gulec Mert; Sigirci, Ahmet; Karaca, Leyla[Abstract Not Available]Öğe Neurofibromas of the bladder in a child with neurofibromatosis type 1(Internatıonal braz j urol, 2018) Doğan, Güleç Mert; Sigirci, Ahmet; Karaca, LeylaÖğe A Novel Physical Examination Test for Ischiofemoral Impingement: Validation With Magnetic Resonance Imaging Correlation(Lippincott Williams & Wilkins, 2021) Ozdemir, Zeynep Maras; Yildirim, Tulay; Karaca, Leyla; Kahraman, Aysegul Sagir; Aydingoz, UstunObjective The purpose of this study was to propose and validate a novel physical examination test for ischiofemoral impingement with magnetic resonance imaging (MRI) correlation. Methods We prospectively studied 24 women with buttock (deep gluteal) pain and 27 asymptomatic women. Each group underwent a 2-stage physical examination test that featured hip adduction-external rotation-extension and knee flexion. Visual analog scale pain scores were noted just before and during test stages on both sides. The MRI findings of the ischiofemoral impingement were evaluated quantitatively and qualitatively. Results Mean ages were 56.0 and 55.2 years (P = 0.797), and mean body mass indexes were 29.1 and 28.8 kg/m(2) (P = 0.817) in symptomatic and asymptomatic groups, respectively. Ischiofemoral spaces were significantly narrower (P < 0.001), ischial angles were wider (P < 0.001, right; P = 0.002, left), and soft tissue edema at the ischiofemoral space was more common (P < 0.001) in the symptomatic group, which also had higher pretest visual analog scale scores (P < 0.001) that increased significantly during both upright standing (P = 0.003, right; P < 0.001, left) and recumbent (P < 0.001 for both sides) stages of the physical examination test. Conclusions A novel physical examination test significantly increases symptoms of ischiofemoral impingement with positive MRI correlation.Öğe Use of dual energy CT urography in evaluation of urinary stone and complex cyst(Tubitak Scientific & Technological Research Council Turkey, 2023) Gezer, Mehmet; Karaca, Leyla; Ozdemir, Zeynep Maras; Kahraman, Aysegul; Oguz, Fatih; Erbay, Fatih; Yetis, HuseyinBackground/aim: Dual-energy computed tomography scans can provide significant benefits to the urinary system. The aim of this study is to determine the limitations and benefits of using dual energy CT urography in patients with urinary system stones and cysts.Materials and methods: In the analysis of the images, the virtual noncontrasted images obtained from the combined nephrogenic-excretory phase and the true noncontrasted images were evaluated. The true noncontrast images were accepted as the gold standard for stone detection.Results: Eighty-three different stones were detected in 26 of the 115 patients included in the study. Sensibilities of virtual noncontrast images in detecting urinary system stones were 66.7% and 65.4% according to the first and second radiologists, respectively. In this study, 32 hyperdense cysts were detected. According to iodine map images, there was no enhancement in 26 of 32 cysts; only 5 cysts showed minimal contrast enhancement. One patient could not decide on contrast enhancement.Conclusion: As a result, if CT urography is performed with dual energy, it can provide additional information in patients with urinary system disorder.Öğe The Value of Superb Microvascular Imaging in Detecting Hepatic Artery Occlusion in Liver Transplantation A Preliminary Study(Lippincott Williams & Wilkins, 2019) Guven, Fadime; Karaca, Leyla; Ogul, Hayri; Sade, Recep; Ozturk, Gurkan; Kantarci, MecitSuperb microvascular imaging (SMI) is an innovative color Doppler technique that is used to evaluate low-velocity blood flow in particular. Our purpose in this study was to examine the sensitivity and specificity of SMI for assessing occlusion of the hepatic artery after liver transplantation. Ninety-five prospective patients who underwent liver transplantation were included in our study between April 2014 and February 2018. The patients were assessed with color power Doppler sonography and SMI method examinations in this study. Those who were suspected of having hepatic artery occlusion were assessed with computed tomography angiography. Computed tomography angiography was used in all the patients who were suspected of having occlusion of the hepatic artery on power Doppler and SMI method. The hepatic artery was considered to be patent and have normal flow on color Doppler examination in 72 (75.7%) of the total 95 patients. The hepatic artery was not observed in 23 (24.2%) of the patients with color Doppler sonography. In 3 of those 23 patients, arterial flow was detected with power Doppler sonography (31%). The sensitivity of SMI for the detection of hepatic artery occlusion was 100%, the specificity was 97.87%, the positive predictive value was 33.33%, and the negative predictive value was 100%. Thus, SMI is a noninvasive technique that is easy to use and has high sensitivity in patients who have undergone liver transplantation. In patients who are suspected of having hepatic artery occlusion with Doppler ultrasound, SMI can detect hepatic artery occlusion without the need for invasive techniques.
