TR-Dizin İndeksli Açık & Kapalı Erişimli Yayınlar

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Author: search.filters.author.Tokmak, NaimeHas files: Yes

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    Evaluation of the Ophtalmic Artery Flow Pattern with Color-Doppler Ultrasonography in the Patients with Carotid Artery Stenosis
    (2015) Demir, Senay; Akgul, Erol; Aikimbaev, Kairgeldy; Tokmak, Naime; Inal, Mehmet; Aksungur, Erol
    Purpose: To assess whether ophtalmic artery flow patterns reflect the status of cerebral circulation in patients with carotid artery stenosis. Material and Method: Twenty-four patients including 14 men and 10 women, with varying degrees of monolateral or bilateral carotid artery stenosis were included in the study. Patients' ages ranged between 32 and 79 years (mean 60). The control group was composed of 12 subjects without carotid artery stenosis who had undergone digital substaction angiography for different purposes. Digital substraction angiography and color-Doppler ultrasonography were performed in all the patients and the control group. Degrees of carotid artery stenosis and flow patterns and velocities, pulsatility and resistance indices of ophtalmic arteries of two groups were compared. Results: Significant differences in ophtalmic artery flow patterns and velocities, pulsatility and resistance indices between those patients with carotid artery stenosis of more than 70% and the control group were recorded. Conclusion: Imaging of the ophtalmic artery with color-Doppler ultrasonography is a useful and cost-effective method that reflects the status of cerebral circulation in patients with carotid artery stenosis.
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    Evaluation of brain perfusion in Alzheimer disease with perfusion computed tomography and comparison to elderly patient without dementia
    (2016) Yildirim, Tulin; Karakurum Göksel, Basak; Demir, Senay; Tokmak, Naime; Tan, Meliha; 27513264
    Background/aim: The aim of this study was to evaluate perfusion computed tomography (PCT) findings in patients with Alzheimer disease and to compare them with those of patients without dementia. Materials and methods: PCT was performed in 35 patients: 20 with Alzheimer disease (mean age, 69.7 +/- 5.5 years) and 15 control subjects (mean age, 67.5 +/- 3.5 years). Control subjects were elderly individuals with no cognitive problems who were admitted with headaches. All PCT examinations were performed on a 4-slice CT unit. The PCT analysis software program was used to calculate regional cerebral blood flow (rCBF), regional cerebral blood volume (rCBV), regional time-to-peak (rTTP) values in the bilateral frontal, temporal, and occipital cortices, and bilateral lentiform nucleus. Results: rCBF values in the bilateral frontal and temporal cortices and bilateral lentiform nucleus were significantly lower in the patients with Alzheimer disease than in the control subjects. There were no significant differences in rCBV values between Alzheimer disease and the control group. rTTP values in all cortical areas and bilateral lentiform nucleus were significantly higher in the patients with Alzheimer disease than in the control subjects. Conclusion: PCT is a rapid and reliable imaging modality for evaluating brain perfusion in Alzheimer disease.