Title :
Evaluation of CMOS APS imager for digital radiography and mammography
Author :
Kim, Kwang Hyun ; Chae, Jeon Sung ; Yuk, Sun Woo ; Kim, Young Soo ; Chi, Young Ki ; Cho, Gyuseong
Author_Institution :
Dept. of Nucl. Eng., Korea Adv. Inst. of Sci. & Technol., Taejon, South Korea
Abstract :
We evaluated image performance of scintillator coupled CMOS APS imager for radiography and mammography conditions, respectively. 80 kVp and 28 kVp of X-ray tube voltage at the SID of 720 mm and 600 mm were set for each condition. Commercially available scintillator such as Lanex screen, needle structured CsI(Tl), and fiber optic structured CsI (Tl) were coupled CMOS APS imager. From the experimental results, needle CsI type scintillator was candidate in radiography condition, having 45 % at 3 mm-1. However, at the higher frequency no scintillator showed good DQE in mammography condition although Lanex fine scintillator has DQE of 0.5 at 6 mm-1.
Keywords :
CMOS image sensors; diagnostic radiography; mammography; medical image processing; solid scintillation detectors; Lanex fine scintillator; SID; X-ray tube; detective quantum efficiency; digital radiography; fiber optic structured CsI (Tl); image performance; mammography; needle structured CsI(Tl); scintillator coupled CMOS APS imager; CMOS image sensors; Charge coupled devices; Image resolution; Mammography; Needles; Optical fibers; Pixel; Radiography; Sensor arrays; X-ray imaging;
Conference_Titel :
Nuclear Science Symposium Conference Record, 2003 IEEE
Print_ISBN :
0-7803-8257-9
DOI :
10.1109/NSSMIC.2003.1352575