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Öğe A new ventricular index based on coronal brain magnetic resonance images in patients with idiopathic normal pressure hydrocephalus(Tubitak Scientific & Technological Research Council Turkey, 2023) Yilmazsoy, Yunus; Arslan, Serdar; Ozdemir, Adnan; Korkmazer, Bora; Kizilkilic, Osman; Kafadar, Ali MetinBackground/aim: The aim of this study was to assess the effectiveness of a new quantitative index for the diagnosis of idiopathic normal pressure hydrocephalus. Materials and methods: This retrospective study was conducted at Istanbul University Cerrahpasa Medical Faculty between January 2016 and November 2022. A total of 31 patients diagnosed with idiopathic normal pressure hydrocephalus were included in the study group and 48 patients were included in the control group. Measurement via the new Index was performed on a coronal section of magnetic resonance imaging at the level of the anterior commissure. Results: The new Index's mean diagnostic performance was 1.16 +/- 0.08 in the study group, significantly lower (p < 0.0001) than the mean of 1.43 +/- 0.10 in the control group. When a cutoff value of 1.23 was used for the new index, the sensitivity, specificity, positive predictive value, negative predictive value, and accuracy rates were 96.1%, 90.7%, 80.6%, 98%, and 91.3%, respectively. Conclusion: The new Index described here is an effective, feasible, reproducible, highly sensitive, and specific quantitative method that can contribute to the improved diagnosis of patients with idiopathic normal pressure hydrocephalus.Öğe CLINICAL UTILITY OF RADIOLOGICAL IMAGING IN THE EVALUATION OF GALLSTONE ILEUS(2019) Özdemir, Adnan; Yılmazsoy, Yunus; Arslan, Serdar; Pehlivanlı, FarukObjective: Gallstone ileus is a rare complication ofcholelithiasis. It occurs as a result of the passage of bile stonesinto intestinal system via bilioenteric fistulae, which are formedby recurrent attacks of cholecystitis, and obstruction of theintestinal lumen. The objective of our study was to discuss theimaging findings of gallstone ileus among patients diagnosed atour center.Material and Methods: Among patients that admitted to ourhospital’s radiology department between December 2016 andJanuary 2019, the medical records of those with a history of gallbladder stone detected on ultrasonography were retrospectivelyevaluated. Among those, cases of gallstone ileus were identified.Admission complaints, age, sex, comorbidities, radiologicalimaging findings, fistula localization, stone size, and obstructionlevel were recorded and analyzed.Results: Among 958 patients with bile stones, 342 (35.7%)were male and 616 (64.3%) were female. Gallstone ileus wasidentified in five patients. Three of them were female (mean age76.67± 13.05 years) and 2 were male (mean age 59±1.41 years).Ileus signs were detected on plain radiograms for all patients.The gallbladders were not clearly visualized by ultrasonographyin any of patients with gallstone ileus. A diameter increasesuggestive of ileus was detected in visualizable intestinalsegments. Computed tomography to identify the cause of ileusrevealed air in the bile ducts, cholecystoduodenal fistula, stonesin intestinal lumen, and an appearance consistent with ileusproximal to that segment. The mean size of the stones was26.20±16.3 mm (16-55 mm).Conclusion: Although gallstone ileus is a rare cause ofintestinal obstruction, it should be definitely remembered in thedifferential diagnosis in patients with advanced age and ahistory of cholelithiasis who present to the emergencydepartment.Öğe Evaluation of optic nerve sheath complex by magnetic resonance imaging in patients with idiopathic normal pressure hydrocephalus(Asean Neurological Assoc, 2023) Yilmazsoy, Yunus; Ozdemir, Adnan; Arslan, SerdarBackground: We aimed to evaluate the optic nerve and optic nerve sheath diameter of patients with idiopathic normal pressure hydrocephalus with magnetic resonance imaging and to compare with the normal population. Methods: Magnetic resonance images and clinical records of the patients were retrospectively evaluated between 01.01.2015 and 01.01.2020. Twenty one patients in the normal pressure hydrocephalus group and 47 patients in the control group were included. Measurements were performed from the images obtained by creating multiplanar reconstructions from thin-slice Fast Spin Echo T2-weighted images. Measurements were made of optic nerve from the 3 mm posterior to the optic globe, on the plane which is oriented perpendicular to the nerve. Results: There was no difference between the two groups in terms of optic nerve diameters. Optic nerve sheath diameters are significantly higher in the normal pressure hydrocephalus group (p<0.0001). Conclusion: Morphological analysis of the optic nerve sheath complex which contains cerebrospinal fluid will contribute to the diagnosis and understanding chronic effects of normal pressure hydrocephalus, a disease in which changes in brain compliance and cerebrospinal fluid absorption are suspected in its etiology.Öğe Incidence of agger nasi and frontal cells and their relation to frontal sinusitis in a Turkish population: a CT study(2018) Özdemir, Adnan; Arslan, SerdarObjectives: The aim of this study was to determine the incidence of agger nasi and frontal cells in a Turkish population andtheir relation to frontal sinusitis.Methods: A total of 412 non-contrast paranasal sinus computed tomography (CT) images taken between March 2017 and June2018 were examined retrospectively. Frontal cells were classified into four types according to Kuhn’s classification. The relationof agger nasi and frontal cells to frontal sinusitis was evaluated.Results: Of the 412 patients, 202 were males (mean age 34.814.9) and 210 were females (mean age 35.113.9). agger nasicell was detected in 214 (51.9%), and frontal cell in 198 patients (48%). Frontal sinusitis was detected in 68 patients (16.5%).According to Kuhn’s classification, Type 1 frontal cell was detected most frequently. A significant relationship was observedbetween the presence of agger nasi and frontal cells and frontal sinusitis (p0.001). When the right and left frontal sinusitis wereevaluated separately, the relationship of frontal cell types of Kuhn’s classification with frontal sinusitis was found to be significant on the right side, but not on the left side.Conclusion: Agger nasi and frontal cells are common paranasal sinus variations that play a role in the development of frontalsinusitis. Although most of the paranasal sinus variationsare considered as predisposing in the development of sinusitis,there are obvious differences in studies. For this reason, a higher number of comprehensive studies are necessary to revealthe relation between the presence of agger nasi and frontal cells and sinusitis.Öğe Safenofemoral bileşke düzeyi major süperfisiyal ven varyasyonları; ultrasonografi yöntemi ile değerlendirilmesi(2019) Özdemir, Adnan; Yılmazsoy, Yunus; Arslan, SerdarAmaç: Bu çalışmanın amacı varis tedavisinde oldukça önemli bir bölge olan safenofemoral bileşke düzeyinin yüzeyel venöz vasküler anatomik varyasyonlarının ultrasonografi ile ortaya konulmasıdır.Gereç ve Yöntem: Hastanemiz radyoloji bölümüne Şubat 2017 – Temmuz 2018 tarihleri arasında venöz yetmezlik ön tanısıyla yönlendirilen 79 hasta çalışmaya dâhil edildi ve toplam 158 safenofemoral bölge venöz vasküler anatomisi B-mod ve renkli doppler ultrasonografi ile değerlendirdi. Safenofemoral bölge yüzeyel venöz vasküler anatomisi detaylı olarak incelendi, Glasser ve Daseler anatomik sınıflandırmalarına göre sınıflandırıldı ve varyasyon sıklıkları hesaplandı.Bulgular: Çalışmamızda Glasser sınıflandırmasına göre en sık görülen grup 30 (%19) safenofemoral bölgede izlenen tip 2C olurken, bunu tip 2B ve 2C takip etti. Daseler sınıflandırmasına göre en sık izlenen safenofemoral bölge varyasyonu tip H (VIII) olurken bunu tip F (VI) ve tip E (V) takip etti. Safenofemoral bileşke düzeyinde safena magnaya açılan süperfisiyal venöz dal sayıları değerlendirildiğinde, 1 ile 5 arasında süperfisiyal venöz dalın açıldığı izlendi. Bunlardan en sık 78 (%49) olguda izlenen üç venöz dalın açıldığı tespit edildi. Bunu sırasıyla iki venöz dalın açıldığı 50 (%32) olgu, dört venöz dalın açıldığı 25 (%16) olgu, bir venöz dalın açıldığı 3 (%2) olgu ve beş venöz dalın açıldığı 1 (%1) olgu takip etti.Sonuç: Safenofemoral bileşke düzeyinde major süperfisiyal venöz yapıların ayrıntılı anatomisinin ultrasonografi ile ortaya konulması, variköz venlerin etiyopatogenezinin ayrıntılı bir şekilde ortaya konmasına yardımcı olmasının yanı sıra selektif tedavi planlanmasına ve dolayısıyla tedavi sonuçlarına katkı sağlayacağı kanaatindeyiz.
