Yazar "Onder, H." seçeneğine göre listele
Listeleniyor 1 - 5 / 5
Sayfa Başına Sonuç
Sıralama seçenekleri
Öğe Brain MRI and MR Spectroscopy Findings in Children with Nutritional Vitamin B12 Deficiency(Springer Heidelberg, 2016) Ekici, F.; Tekbas, G.; Hattapoglu, S.; Yaramis, A.; Onder, H.; Bilici, A.Our aim in this study was to analyze the findings of brain magnetic resonance imaging (MRI) and magnetic resonance spectroscopy (MRS) of children with vitamin B-12 deficiency. This study included 14 cases. The findings of brain MRI and MRS in all cases were investigated. Four patients had been followed up and mean follow-up time 71.8 (59-85) day. Eight patients of the cases (57 %) had at least one abnormal MRI finding. The most commonly found MRI findings were thinning of the corpus callosum and brain atrophy, respectively. The mean ratio of NAA/Cr and Cho/Cr were measured in MRS, with values of 1.31 +/- 0.17 and 1.04 +/- 0.27, respectively. In two of three patients with abnormal MRI studies at presentation, subsequent MRI showed improvement while one patient remained unchanged. An increase in the ratios of metabolites were found in one case with control MRS. There was no lactate peak. Brain MRI was abnormal in more than half of the cases of children with vitamin B-12 deficiency. Our radiologic findings similar with literature. There was no identifiable lactate peak. B-12 deficiency could be the cause of the thinning of the corpus callosum and brain atrophy in the children that were given a brain MRI.Öğe Evaluation of hepatic metabolic activity in non-alcoholic fatty livers on 18FDG PET/CT(Elsevier Doyma Sl, 2013) Dostbil, Z.; Varoglu, E.; Serdengecti, M.; Kaya, B.; Onder, H.; Sari, O.Objective: The liver has been used as a reference organ for the assessment of abnormal F-18-fluoro-2-deoxy-D-glucose ((18)FDG) in the body. Some researchers found that hepatosteatosis significantly changed the hepatic (18)FDG uptake, while others did not. This study investigated whether the liver's (18)FDG uptake was affected by the diffuse fatty infiltration of the liver. Material and methods: A total of 156 cases were included in this study. Different patient groups were defined according to the liver Hounsfield unit (HU). The HU was calculated from an unenhanced CT, for all patients, and we calculated the mean standardized uptake value (STmean) and maximum standardized uptake value (SUNmax) on an (18)FDG PET scan. For this purpose, we placed regions of interest (ROIs) on the liver image. We statistically compared the SUVmean and SUVmax measured in the fatty liver patients and the control group. Results: The average SUVmean and SUVmax values were calculated as 2.58 +/- 0.66 and 3.94 +/- 1, respectively, in the patient group and 2.54 +/- 0.57 and 3.7 +/- 0.88, respectively, in the control group. We found the average SUVmean and SUVmax values in the fatty liver group and its subsets were not significantly different from the values in the control group (p > 0.05). We also did not find any statistically significant correlation between average liver density (HU) and the average SUV values (p > 0.05). Conclusion: Fatty infiltration may not have a significant effect on the liver's (18)FDG uptake. Thus, the liver may be used as a reference or comparator on (18)FDG PET scans in patients with fatty liver disease. (C) 2012 Elsevier Espana, S.L. and SEMNIM. All rights reserved.Öğe Evaluation of pulmonary vein variations in the middle pulmonary lobe with 64-slice multidetector computed tomography(Verduci Publisher, 2011) Tekbas, G.; Ekici, F.; Tekbas, E.; Gumus, H.; Onder, H.; Bilici, A.; Yavuz, C.Purpose: To evaluate the multi detector computed tomographic (CT) depiction of middle lobe vein variation of the right pulmonary vein and create a diagram for cardiologist and cardiovascular surgeons. Materials and Methods: According to hospital records, between January 2009 and April 2010, 314 consecutive patients underwent pulmonary CT angiography (CTPA) and coronary CT angiography. The CT films from these patients were retrospectively analyzed. Results: Under normal conditions, the middle pulmonary vein (MPV) drains into the left atrium either by the direct or indirect route. Direct (37 patients, 11.8%) drainage means that the MPV does not drain into the upper or lower pulmonary veins but instead drains directly into the right pulmonary vein system. In contrast, indirect (276 patients, 87.9%) drainage occurs when the MPV drains into the upper or lower pulmonary veins. In this study, 12 different variations in drainage patterns were found. Conclusion: Increasing the number of patients may have led to the identification of additional variants. However, clinically important variations are rarely seen. Correct mapping of the MPV is very important for cardiologists and for surgeons in order to provide the best treatment and avoid complications.Öğe Relation between electrophysiological findings and diffusion weighted magnetic resonance imaging in ulnar neuropathy in the elbow(Wiley-Blackwell, 2012) Altun, Y.; Aygun, S.; Cevik, M. U.; Acar, A.; Varol, S.; Arikanoglu, A.; Onder, H.[Abstract Not Available]Öğe Variations of the celiac trunk and hepatic arteries: a study with 64-detector computed tomographic angiography(Verduci Publisher, 2013) Gumus, H.; Bukte, Y.; Ozdemir, E.; Senturk, S.; Tekbas, G.; Onder, H.; Ekici, F.OBJECTIVES: The aim of the present study was to evaluate variations in celiac trunk and hepatic artery with multi-detector computed tomography (MDCT). PATIENTS AND METHODS: Totally 820 patients who underwent angiography of the abdominal aorta were evaluated. Anatomical findings were grouped according to the Michels classification. RESULTS: Several variations and/or anomalies were noted in 33.2% of the patients (n=272). The most common abnormality was Michels type III (10.1%), followed by type V (7.3%), type II (4.7%) and others. Type X was not observed in our series. We have noted additional, previously unclassified variations in 12 cases (1.5%). CONCLUSIONS: Preoperative knowledge of variant anatomy may assist in the selection of treatment options and surgical planning, which in turn facilitates surgical dissection and helps avoiding iatrogenic injury. MDCT angiography allows detailed visualization of the vascular anatomy.
