Person: ÖZDEMİR, HÜSEYIN
Now showing 1 - 10 of 17
- PublicationMetadata onlyComparison of TOF MRA, Contrast-Enhanced MRA and Subtracted CTA from CTP in Residue Evaluation of Treated Intracranial Aneurysms(2018-01-01) Dundar, TOLGA TURAN; Kits, Serkan; Ozdemir, HÜSEYİN; Seyithanoglu, MEHMET HAKAN; Uysal, Omer; Toprak, HÜSEYİN; Ozek, ERDİNÇ; Alkan, ALPAY; DÜNDAR, TOLGA TURAN; ARALAŞMAK, AYŞE; ÖZDEMİR, HÜSEYIN; SEYİTHANOĞLU, MEHMET HAKAN; UYSAL, ÖMER; TOPRAK, HÜSEYİN; KİTİŞ, SERKAN; ÖZEK, ERDİNÇ; ALKAN, ALPAYAIM: To compare effectiveness of contrast-enhanced magnetic resonance angiography (CE-MRA), 3D-Time-of-flight magnetic resonance angiography (3D-TOF-MRA) and subtracted computed tomography angiography from computed tomography perfusion (sub-CTA) in residue evaluation of intracranial aneurysms treated either with coiling or clipping.
- PublicationMetadata onlyDorsolateral Prefrontal Cortex Volumes Remained Unchanged in Obsessive Compulsive Disorder(2013-03-01T00:00:00Z) Ozdemir, HÜSEYİN; Atmaca, Murad; Yildirim, Hanefi; Gurok, M. Gurkan; ÖZDEMİR, HÜSEYINBackground:The dorsolateral prefrontal cortex (DLPFC) is an important prefrontal section of cortex, associated with executive functions, attention, nonverbal memory, and visuospatial skills, which have been reported to be disabled in OCD. In addition, neurochemical alterations of the DLPFC have been reported in OCD.
- PublicationMetadata onlyComparison of Delay-Sensitive and Delay-Insensitive Computed Tomography Perfusion Methods in Acute Ischemic Stroke and Their Variability According to Location of Critical Vascular Stenosis(2018-01-01) KARAALIOGLU, Banu; Aralasmak, AYŞE; Toprak, HÜSEYİN; Kolukisa, MEHMET; Uysal, Omer; Yildiz, Seyma; Ozdemir, HÜSEYİN; Alkan, ALPAY; ARALAŞMAK, AYŞE; TOPRAK, HÜSEYİN; KOLUKISA, MEHMET; UYSAL, ÖMER; YILDIZ, ŞEYMA; ÖZDEMİR, HÜSEYIN; ALKAN, ALPAYObjective The aim of this study was to evaluate visual and quantitative differences of delay-sensitive (singular value deconvolution [SVD]) and delay-insensitive (SVD+) computed tomography perfusion (CTP) postprocessing methods in acute ischemic stroke patients and their variability according to location of critical stenosis.
- PublicationMetadata onlyCSF otorhinorrhea in a child with inner ear dysplasia: diagnosis with T2-weighted and intrathecal contrast-enhanced MR cisternography(2014-07-01) MEHDİ, Elnur; Alkan, ALPAY; YETIS, Huseyin; Aralasmak, AYŞE; Ozdemir, HÜSEYİN; ALKAN, ALPAY; ARALAŞMAK, AYŞE; ÖZDEMİR, HÜSEYINDuring the follow-up of recurrent pneumonia in a 9-month-old girl, rhinorrhea with discharge of a positional and intermittent nature was discovered. Radiological assessment was requested to detect any skull base openings and cerebrospinal fluid (CSF) leakage. T2-weighted MR cisternography showed bilateral inner ear dysplasia, communication of the internal auditory canal with the vestibule, and effusion in the right middle ear. Intrathecal contrast-enhanced MR cisternography revealed a CSF fistula from the right internal auditory canal to the Eustachian tube. The patient was operated upon on the right side, and the presence of a CSF leak near the oval window was confirmed. No adverse effects were seen during the short-term and long-term follow-up. Diagnosing this case required special attention, careful examination, and relevant investigations to find the site of CSF leakage in this patient with bilateral inner ear dysplasia.
- PublicationMetadata onlyDiffusion tensor imaging findings of the brainstem in subjects with tonsillar ectopia(2018-03-01) Kurtcan, SERPİL; Alkan, ALPAY; YETIS, Huseyin; TÜZÜN, Umit; Aralasmak, AYŞE; Toprak, HÜSEYİN; Ozdemir, HÜSEYİN; KURTCAN, SERPİL; ALKAN, ALPAY; ARALAŞMAK, AYŞE; TOPRAK, HÜSEYİN; ÖZDEMİR, HÜSEYINWe aimed to evaluate the differences between apparent diffusion coefficient (ADC), fractional anisotropy (FA), axial diffusivity (AD), and radial diffusivity (RD) values obtained from different cranial sites in subjects with Chiari I Malformation (CM-I) and borderline tonsillar ectopia (BTE), and to determine correlations between diffusion tensor imaging (DTI) metrics and the severity of tonsillar ectopia. A total of 73 subjects with CM-I and BTE and 35 control underwent MRI and DTI. In our study, ADC values measured from the level of medulla oblongata and the RD values measured in middle cerebellar peduncles, thalamus, and globus pallidus were higher in CM-I patients than in controls. FA values at the medulla oblongata level and AD values at the medulla oblongata and pons level higher in patients with CM-I. ADC and AD values measured at the pons level were higher in BTE subjects than in controls. Compared with BTE, the CM-I subjects- ADC values at the medulla oblongata and AD values at the pons level were higher. In addition, FAs at the pons and medulla oblongata level were higher. At the medulla oblongata level, a positive correlation was observed between ADC and the size of tonsillar ectopia. AD and FA values measured at the level of medulla oblongata and pons were positively correlated with the size of tonsillar ectopia. These findings may be related to the severity of microstructural changes involving neuronal tracts at the brainstem level due to tonsillar ectopia. DTI may be useful in determining the extent of microstructural changes at the tissue level in subjects with tonsillar ectopia.
- PublicationOpen AccessRadioembolization Treatment for Liver Cancer(2016-04-01) Erdogan, EZGİ BAŞAK; Ozdemir, HÜSEYİN; Aydin, MEHMET; ERDOĞAN, EZGİ BAŞAK; ÖZDEMİR, HÜSEYIN; AYDIN, MEHMETAlthough curative treatment is surgery (resection/transplantation) and for small lesions ablative strategies, in primary liver carcinomas such as hepatocellular carcinoma and cholangiocellular carcinoma, palliative treatment is used for most of these patients because of lack of surgical options. These treatments are regional treatments such as transarterial chemoembolization, radiofrequency ablation, or microwave ablation and systemic treatments such as tyrosine kinase inhibitors. Surgery and chemotherapy are the main treatment options for metastatic liver tumors, particularly in colorectal tumors, although local treatment options are used for these patients. In recent years, transarterial radioembolization with yttrium-90 microsphere has emerged as a local treatment option in primary and metastatic liver tumors. The aim of this treatment is to provide an effective radiation dose distribution for the tumor in the liver tissue and to give the lowest dose in order to not harm the intact liver tissue. Radioembolization has proven to be as effective as other available palliative treatments in primary and secondary liver tumors and is a treatment method that is well tolerated. It has a risk for serious life-threatening complications, although this rate is low. Toxicity can be kept at a minimum with adequate technical and rigorous application in experienced hands and in accordance with multidisciplinarity. It is hoped that the effectiveness of radioembolization is further increased in the future by technological developments, researches on dosimetry, its use along with radiosensitizing agents, and various treatment combinations.
- PublicationMetadata onlyThe Contribution of DTI in Determining the Relationship of Epilepsy and Brain Lesions in Children with Tuberous Sclerosis(2018-01-01) Kurtcan, SERPİL; Alkan, ALPAY; GULER, Serhat; Yesil, GÖZDE; Toprak, HÜSEYİN; Tüzün, Umit; YETIS, Huseyin; Aralasmak, AYŞE; Ozdemir, HÜSEYİN; Iscan, AKIN; KURTCAN, SERPİL; ALKAN, ALPAY; YEŞİL, GÖZDE; TOPRAK, HÜSEYİN; ARALAŞMAK, AYŞE; ÖZDEMİR, HÜSEYIN; İŞCAN, AKINBackground: In spite of the fact that advanced neuroimaging applications are used for the evaluation of Tuberous Sclerosis (TS) patients, a few studies analyzed relationship between the measurements of DTI (diffusion tensor imaging) and neurological findings.
- PublicationMetadata onlyAn Unusual Complication of Transarterial Chemoembolization of Hepatocellular Carcinoma; Pseudoaneurysm: A Case Report(2022-01-01T00:00:00Z) Atay, Musa; ÖZDEMİR, Hüseyin; ÖZDEMİR, HÜSEYINBackground: Transarterial Chemoembolization (TACE) is a globally recognised treatment method for hepatic tumors, especially unresectable Hepatocellular Carcinoma (HCC). Although the technique is relatively safe, it may cause serious complications, such as liver abscess, liver failure, and non-target embolization. Here, the case of a rare complication of TACE is presented. Case Presentation: A-55-year-old male patient was referred to the interventional radiology department for surgically unresectable HCC. CT scan showed a heterogeneously enhancing lesion with capsular enhancement consistent with HCC. On MRI examination, a central necrotic part was seen within the lesion, and TACE was performed. At the end of the TACE, a pseudoaneurysm of the hepatic artery was detected, which was successfully embolized with pushable micro-coils. Conclusion: To the best of our knowledge, very few cases of pseudoaneurysm of the hepatic artery have been described in the literature, and in those cases, the cause has been thought to be guidewire manipulation. In contrast, in the current case, it was thought that it might occur due to central necrosis and central perfusion insufficiency of the lesion. Pseudoaneurysm is a treatable condition with coil embolization.
- PublicationMetadata onlyHyperperfusion in Carotid Stenting Patients(2015-05-01) Aralasmak, AYŞE; ATAY, Musa; Toprak, HÜSEYİN; OZDEMIR, Tugce; Asil, TALİP; GOKTEKIN, Omer; MEHDI, Elnur; Ozdemir, HÜSEYİN; Alkan, ALPAY; ARALAŞMAK, AYŞE; TOPRAK, HÜSEYİN; ASİL, TALIP; ÖZDEMİR, HÜSEYIN; ALKAN, ALPAYPurpose: This study aimed to define hyperperfusion in carotid stenting patients without excluding patients with stenosis on the contralateral side.
- PublicationMetadata onlyKaraciğer tümörlerinde radyoembolizasyon tedavisi(2016-01-01) ERDOĞAN, EZGİ BAŞAK; ÖZDEMİR, HÜSEYİN; AYDIN, MEHMET; ÖZDEMİR, HÜSEYIN