Browsing by Author "Yilmaz, Omer"

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    Comparison of Brain MRI Angiography and Brain MRI Cisternography in Patients with Hemifacial Spasm
    (2016) Ocal, Ruhsen; Tunc, Tuba; Ayas, Zeynep Ozozen; Yilmaz, Omer; Inan, Levent Ertugrul; 26908032
    The aim of this study was to compare the ability of brain magnetic resonance imaging angiography and brain magnetic resonance imaging cisternography of showing the neurovascular contiguity of the facial nerve in patients with hemifacial spasm. This study included a total of 35 patients (28 females, 7 males), with an average age of 57.5 +/- 13.8 years, who presented to our outpatient clinic of movement disorders. All patients were prospectively applied brain magnetic resonance imaging angiography and brain magnetic resonance imaging cisternography, and the results were evaluated by a radiologist who was blind to study protocol. The study included 35 patients, of whom 28 (80 %) were female and 7 (20 %) were male. Brain magnetic resonance imaging angiography demonstrated facial nerve compression of vascular origin in 5 (14.3 %) patients presenting with the clinical presentation of hemifacial spasm. Neurovascular compression of facial nerve was shown by brain magnetic resonance imaging cisternography in 13 (37.1 %) patients. No statistically significant difference was found between brain magnetic resonance imaging angiography and brain magnetic resonance imaging cisternography techniques in detecting a compressive interaction causing hemifacial spasm between facial nerve and adjacent vascular structures (p > 0.05).
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    Imaging Characteristics of Stafne Bone Cavity: Pictorial Essay
    (2017) Aydin, Ulkem; Yildirim, Derya; Gormez, Ozlem; Bozdemir, Esin; Yilmaz, Omer; Erik, Ayse Aydogmus; Orhan, Mukkadder
    Background: Stafne bone cavities (SBCs) are typically seen on panoramic radiographs as unilocular, rounded or ovoid shaped, welldefined corticated radiolucencies that are located between the mandibular first molar and the angle of the mandible below the inferior alveolar canal, but they may rarely have different radiographic appearances and locations. Objectives: The purpose of this study was to evaluate the imaging features of SBC presenting various typical and atypical features and to show the contribution of different imaging techniques to diagnosis. Patients and Methods: Seventeen patients who had a panoramic radiograph that revealed an image compatible with SBC were investigated in this study. In addition to panoramic radiography, lateral oblique mandible projection for three patients, cone beam computed tomography (CBCT) for nine patients, magnetic resonance imaging (MRI) for two patients were performed to determine the exact location of the cavity and to confirm the diagnosis. Results: Seventeen patients were diagnosed with SBC. Two patients had bilobed SBC, one patient had a SBC on the buccal surface of the posterior mandible, one patient had a SBC located in the ramus mandible, one patient had a SBC located in the canine-premolar region namely anterior lingual variant as rare conditions. Conclusion: Imaging techniques such as CBCT and MRI have provided detailed information about definitive diagnosis of SBC in addition to panoramic radiographs. These techniques show the size, location and content of the SBC. If the SBC is atypical, complementary imaging techniques gain more importance.