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2 March 2006 Comparison of two detector systems for cone beam CT small animal imaging: a preliminary study
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Purpose: To compare two detector systems - one based on the charge-coupled device (CCD) and image amplifier, the other based on a-Si/CsI flat panel, for cone beam computed-tomography (CT) imaging of small animals. A high resolution, high framing rate detector system for the cone beam CT imaging of small animals was developed. The system consists of a 2048×3072×12 bit CCD optically coupled to an image amplifier and an x-ray phosphor screen. The CCD has an intrinsic pixel size of 12 μm but the effective pixel size can be adjusted through the magnification adjustment of the optical coupling systems. The system is used in conjunction with an x-ray source and a rotating stage for holding and rotating the scanned object in the cone beam CT imaging experiments. The advantages of the system include but are not limited to the ability to adjust the effective pixel size and to achieve extremely high spatial resolution and temporal resolution. However, the need to use optical coupling compromises the detective quanta efficiency (DQE) of the system. In this paper, the imaging characteristics of the system were presented and compared with those of an a- Si/CsI flat-panel detector system.
© (2006) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Yang Meng, Chris C. Shaw, Xinming Liu, Mustafa C. Altunbas, Tianpeng Wang, Lingyun Chen, Shu-Ju Tu, S. Cheeenu Kappadath, and Chao-Jen Lai "Comparison of two detector systems for cone beam CT small animal imaging: a preliminary study", Proc. SPIE 6142, Medical Imaging 2006: Physics of Medical Imaging, 614245 (2 March 2006);


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