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Öğe ASSESSMENT OF TEN-YEAR-LONG RESULTS OF KIDNEY BIOPSIES PERFORMED ON CHILDREN IN THE THRACE REGION OF TURKEY -- 2(SPRINGER, 2015) Ozkayin, Nese; Ciplak, Gokce; Usta, Ufuk; Genchellac, Hakan; Temizoz, Osman[Abstract not Available]Öğe Computed tomography findings of polysplenia syndrome with multiple anomalies(UNIV CATHOLIQUE LOUVAIN-UCL, 2016) Guler, Ibrahim; Koplay, Mustafa; Ozbek, Seda; Temizoz, Osman; Cebeci, HakanA 54-year-old patient presented to our hospital with the symptoms of stomach ache, weakness, loss of appetite and weight loss. The patient had mild abdominal sensitivity during physical examination; the results of other systemic examinations were normal. Laboratory findings showed anemia. Since the patient's symptoms were accompanied by weight loss, abdominal CT examination was performed to rule out any malignancies. The abdominal CT examination showed a picture consistent with partial situs inversus. The liver was located on the left, the spleen on the right and the heart was in its normal position. The cecum was observed in the lower left quadrant. Multiple spleens located in the upper right quadrant were observed (Fig. 1). Pancreas was ectopically located in the upper left quadrant and surrounded the second part of the duodenum. A diverticular formation was detected in the second part of the duodenum.Öğe Detection and quantification of the parenchymal abnormalities in emphysema using pulmo-CT(PERGAMON-ELSEVIER SCIENCE LTD, 2007) Temizoz, Osman; Etlik, Omer; Sakarya, Mehmet Emin; Uzun, Kursat; Arslan, Halil; Harman, Mustafa; Demir, Mustafa KemalWe aimed to determine the degree and extent of parenchymal abnormalities on pulmo-CT in patients with emphysema. The study group consisted of 29 patients (18 male, I I female; mean age 57.9. L 13). The diagnosis was based on clinical symptoms, pulmonary function tests (PFT) values, and chest CT findings. All of the patients CT scans were obtained during suspended deep inspiration from the apices to the costophrenic angles. The mean lung attenuation (MLD) and parenchymal abnormalities related to emphysema were quantitatively calculated with tables, histograms and graphics at the whole lung. The lung density measurements revealed a mean density of -898.48 +/- 51.37 HU in patients with emphysema and -825.1 +/- 25.5 HU in control group. In addition, mean percentage of subthreshold attenuation values was found as 12.03 +/- 15.75 and 1.07 +/- 0.83 in patients with emphysema and control group, respectively. Compared with control group, the patients with emphysema had a significantly lower inspiratory MLD (p < 0.05). Additionally, statistically significant correlations were seen between the MLD and percentage of subthreshold values (r = 0.44, p < 0.05). In contrast, there was poor correlation between PFT measurements and the subthreshold values. In conclusion, pulmo-CT is a quick, simple method for quantitative confirmation of the presence of parenchymal abnormalities of lung as mosaic attenuation and should be used in combination with other radiological methods and PFT as it gives additional information to routine examinations in patients with emphysema. (c) 2007 Elsevier Ltd. All rights reserved.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 Spinal intramedullary metastasis as the first manifestation of lung cancer(ELSEVIER SCIENCE INC, 2015) Nayman, Alaaddin; Ozbek, Seda; Temizoz, Osman; Kanat, Fikret; Kivrak, Ali S.[Abstract not Available]Öğe Ultrasound validation of Trendelenburg positioning to increase internal jugular vein cross-sectional area in chronic dialysis patients(TAYLOR & FRANCIS LTD, 2015) Nayman, Alaaddin; Onal, Ibrahim Ozkan; Apiliogullari, Seza; Ozbek, Seda; Saltali, Ali Ozgul; Celik, Jale Bengi; Temizoz, OsmanBackground and aim: Trendelenburg positioning (TP) is a common approach used during internal jugular vein (IJV) cannulation. No evidence indicates that TP significantly increases the cross-sectional area (CSA) of the IJV or decreases the overlap between the carotid artery (CA) and the IJV in dialysis patients. The primary aim of this study was to investigate the effects of the TP on the CSA of the right IJV and on its relationship to the CA. Methods: Thirty-seven consecutive hemodialysis patients older than 18 years of age were enrolled. We measured the CSA of the right IJV and overlap rate (at end-expiration at the level of the cricoid cartilage) between the CA and the IJV in two positions: State 0, table flat (no tilt), with the patient in the supine position; State T, in which the operating table was tilted to 15 degrees of TP. Results: Data were collected for all of the 37 patients enrolled in the study. The change in CSA and overlap between the CA and the IJV from the supine to the TP was not significantly different. The CSA was paradoxically decreased in 11 of 37 patients when changed from State 0 to State T. Conclusions: TP does not significantly increase the CSA of the right IJV or decrease the overlap between the CA and the IJV in dialysis patients. In fact, in some patients, it reduces the CSA. Therefore, the use of the TP for IJV cannulation in dialysis patients can no longer be supported.
