%0 Journal Article
%T Lesion detection in conventional gamma camera, SPECT and SPECT / CT systems: Phantom study
%A Mustafa Demir
%J -
%D 2019
%X Objective: It was aimed to create special phantom to be used for benchmarking the lesion detectability of planar, SPECT and SPECT / CT systems by computing the corresponding contrast (C) and contrast / noise ratio (CNR) of the lesions with different activity concentrations. Method: In the study, the phantom was equiped with with four lesions filled with radioiodine (131I). The phantom¡¯s planar images were acquired by two different gamma cameras with small field of view (SFOV) and large field of view (LFOV). Tomographic images were obtained from SPECT and SPECT / CT scans. Contrast (C) and contrast-to-noise ratio (CNR) were calculated by delineating areas of interest (ROI) over the tubes and background with different activity concentrations in the phantom. Results: As the camera¡¯s field of view increased, the related contrast and CNR values increased partially. Contrast and CNR values of SPECT and SPECT / CT images were significantly higher than planer images. Conclusions: It was found that the superior lesion detectability might be achieved by SPECT or SPECT / CT (AC) imaging techniques
%K Tip 1 Diabetes Mellitus
%K Ketoasidoz
%K Risk Fakt£¿rleri
%K £¿ocuk
%K £¿ocuk Yo£¿un Bak£¿m
%U http://dergipark.org.tr/223/issue/44220/530580