Event Title
Quality Assurance of Computed Tomography
Presentation Type
Poster/Portfolio
Presenter Major(s)
Physics
Mentor Information
Anthony Chang, Richard Vallery
Department
Van Andel Institute, Physics
Location
Kirkhof Center KC48
Start Date
11-4-2012 9:00 AM
Keywords
Health, Physical Science
Abstract
Computed Tomography is an imaging method that uses X-rays emitted and detected at different orientations to create a 3D image of the subject. To ensure that all data acquired is reliable and reproducible, the quality of the GE Micro-CT must be investigated. Two different levels of X-Ray production are measured. A quality assurance phantom was used to acquire images on the GE Micro-CT. MATLAB was then used to examine the images in terms of spatial resolution, signal to noise ratio, CT number evaluation, and geometric accuracy for two different levels of X-ray production: 40 mA and 50 mA. The results for the 40 and 50 mA images were equivalent in regards to spatial resolution, linearity with respect to attenuation, and geometric accuracy. All measured differences involved a higher level of noise on the 40 mA image. The GE Micro-CT provides images of acceptable quality at both 50 and 40 mA.
Quality Assurance of Computed Tomography
Kirkhof Center KC48
Computed Tomography is an imaging method that uses X-rays emitted and detected at different orientations to create a 3D image of the subject. To ensure that all data acquired is reliable and reproducible, the quality of the GE Micro-CT must be investigated. Two different levels of X-Ray production are measured. A quality assurance phantom was used to acquire images on the GE Micro-CT. MATLAB was then used to examine the images in terms of spatial resolution, signal to noise ratio, CT number evaluation, and geometric accuracy for two different levels of X-ray production: 40 mA and 50 mA. The results for the 40 and 50 mA images were equivalent in regards to spatial resolution, linearity with respect to attenuation, and geometric accuracy. All measured differences involved a higher level of noise on the 40 mA image. The GE Micro-CT provides images of acceptable quality at both 50 and 40 mA.