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ÇANAYAZ, EMRE

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ÇANAYAZ

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EMRE

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2015 - 201912020 - 20222
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    Machine learningalgorithms for detecting risk of atrial fibrillation using baseline holter ecg and echocardiography data
    (2021-11-21) ÇANAYAZ, EMRE; ALTIKARDEŞ, ZEHRA AYSUN; TOKAY TARHAN, SENA; FAK, ALİ SERDAR; ÇANAYAZ E., ALTIKARDEŞ Z. A., MERT K. U., DURAL M., AYDIN V., KOCAKAYA O., TOKAY TARHAN S., GÖRENEK B., FAK A. S.
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    Tactile processing in children and adolescents with obsessive-compulsive disorder
    (TAYLOR & FRANCIS LTD, 2015) ÇANAYAZ, EMRE; Guclu, Burak; Tanidir, Canan; Canayaz, Emre; Guner, Bora; Toz, Hamiyet Ipek; Uneri, Ozden S.; Tommerdahl, Mark
    Many obsessive-compulsive disorder (OCD) patients experience sensory phenomena, such as bodily sensations and just-right'' perceptions accompanying compulsions. We studied tactile processing in OCD by psychophysical experiments targeting the somatosensory cortex. Thirty-two children and adolescents with OCD (8 tic-related, 19 with sensory phenomena (SP)) and their sex-and age-matched controls participated in the study. After clinical assessments, two questionnaires were completed for sensory problems (Sensory Profile and Touch Inventory for Elementary-School-Aged Children). The psychophysical experiments consisted of five tasks: simple reaction time, choice reaction time, dynamic (detection) threshold, amplitude discrimination, and amplitude discrimination with single-site adaptation. The tactile stimuli were sinusoidal mechanical vibrations (frequency: 25 Hz) applied on the fingertips. Just-noticeable differences (JNDs) were found in amplitude discrimination tasks. There was no difference between the OCD group and controls in detection thresholds. However, the OCD group (especially young males) had worse amplitude discrimination (i. e., higher JNDs) than controls. Young OCD participants had reduced adaptation than young controls. Tic-related OCD participants and those with SP had higher detection thresholds than those without. Additionally, the OCD group reported more problems than controls in the Emotional/Social subset of the Sensory Profile questionnaire. The discrimination results show altered tactile processing in OCD at suprathreshold levels. This can be explained by a scaling factor modifying the sensory signal with decreasing slope at higher input levels to achieve normal Weber fractions internally. Quadratic discriminant analysis gave the best positive (76%) and negative (60%) predictive values for classifying individuals (into OCD'' or control'' groups) based on psychophysical data alone.
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    Geliştirilen yapay zekâ teknolojileri klinik uygulamalarda ne kadar yer buluyor?
    (Türkiye Klinikleri Yayınevi, 2022-11-01) ÇANAYAZ, EMRE; ALTIKARDEŞ, ZEHRA AYSUN; Çanayaz E., Altıkardeş Z. A.
    Veri hacmindeki artışla birlikte verinin çeşitlenmesi, özellikle gerçek zamanlı veri akışındaki hız ile birlikte verilerin doğruluğundaki belirsizlik etkenleri hayatımıza giren büyük veri kavramını doğurmuştur. Son yıllarda günlük hayatımızdaki uygulamalara girecek kadar gelişim gösteren yapay zekâ başlığı altında yer alan yöntemlerin gelişmesi, büyük veri ile birlikte kullanılarak özellikle sağlık alanında klasik çözümlere göre maliyet azaltma, zaman kazandırma, insansı hataları indirgeme gibi yararları sunabilmenin sinyallerini vermektedir. Peki yapay zekâ ile geliştirilen sistemlerin klinik çalışmalarda yer bulması ne kadar kolay olacaktır? Bu çalışma ile sorunun cevabı irdelenmekte ve elde edilen çarpıcı sonuçlar paylaşılmaktadır.