Browsing by Author "Bugdayci, Onur"

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SAFE: A Novel Microwave Imaging System Design for Breast Cancer Screening and Early Detection-Clinical Evaluation
(MDPI, 2021-01-01) Janjic, Aleksandar; Cayoren, Mehmet; Akduman, Ibrahim; Yilmaz, Tuba; Onemli, Emre; Bugdayci, Onur; Aribal, Mustafa Erkin
SAFE (Scan and Find Early) is a novel microwave imaging device intended for breast cancer screening and early detection. SAFE is based on the use of harmless electromagnetic waves and can provide relevant initial diagnostic information without resorting to X-rays. Because of SAFE's harmless effect on organic tissue, imaging can be performed repeatedly. In addition, the scanning process itself is not painful since breast compression is not required. Because of the absence of physical compression, SAFE can also detect tumors that are close to the thoracic wall. A total number of 115 patients underwent the SAFE scanning procedure, and the resultant images were compared with available magnetic resonance (MR), ultrasound, and mammography images in order to determine the correct detection rate. A sensitivity of 63\% was achieved. Breast size influenced overall sensitivity, as sensitivity was lower in smaller breasts (51\%) compared to larger ones (74\%). Even though this is only a preliminary study, the results show promising concordance with clinical reports, thus encouraging further SAFE clinical studies.
Supplementary abbreviated supine breast MRI following a standard prone breast MRI with single contrast administration: is it effective in detecting the initial contrast-enhancing lesions?
(TURKISH SOC RADIOLOGY, 2019-01-01) Aribal, Erkin; Bugdayci, Onur
PURPOSE We aimed to evaluate the detectability of contrast enhancing lesions, initially demonstrated in standard prone dynamic contrast-enhanced MRI (DCE-MRI), in a supplementary supine breast MRI examination performed following the standard prone DCE-MRI examination and to show the correlation of spatial displacement of the lesions with breast size and density. METHODS Forty-two patients with 45 lesions were prospectively evaluated. Supine breast MRI was acquired with a 6-channel body coil following a standard DCE-MRI in prone position after repositioning the patient. No additional contrast media was administered. Images were evaluated by two radiologists in consensus for the visibility of the lesions. Lesion localization relative to the sternal midline, chest wall and nipple was measured in both prone and supine positions. Correlations between lesion displacement and breast size or breast density were analyzed. RESULTS Of 45 lesions, 23 (52.3\%) were masses, 22 (47.7\%) were nonmass enhancements (NME). Forty-four lesions (97.8\%) could be detected on supine images. One linear NME of 33 mm in length could not be seen on supine images. Twenty (46.5\%) of the detected lesions in supine position were equal to or smaller than 10 mm (11 NME {[}55\%] and 9 masses {[}45\%]). Lesion displacement relative to the chest wall increased with increasing breast size (P < 0.001). CONCLUSION An abbreviated supine sequence following a standard prone DCE-MRI with single contrast media administration is an effective method for defining the lesion location in supine position.
Ultrasound and MRI features of lipomatosis of the median nerve: A case study
(MARMARA UNIV, FAC MEDICINE, 2018-01-01) Gundogmus, Cenral Aydin; Bugdayci, Onur; Aribal, Mustafa Erkin
We present a case of a 10 year-old girl with slowly enlarging, painless mass at the volar aspect of her left hand. The lesion had been present since infancy. Diagnosis was lipomatosis of the median nerve which is a very rare, benign tumor involving peripheral nerves. Magnetic resonance imaging (MRI) and ultrasound (US) features of this lesion are discussed.