Optimizing the Bone Scan of Static Image Quality using Taguchi Analysis

• Main Authors: HUANG, PU-JUNG, 黃莆蓉
• Other Authors: PAN, LUNG-KWANG
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/n6xc88

碩士 === 中臺科技大學 === 醫學影像暨放射科學系暨研究所 === 105 === Objective: This study adopted Taguchi method to optimize the operative factors of static image in bone scan to achieve optimal image for patients undergone nuclear examination.Materials and Methods: Seven operative factors of routine gamma camera scanning （Siemens E-cam Dual Head γ Camera） were defined and assigned to various levels according to Taguchi’s L18 （21×36）recommendation. Eighteen combinations of various levels of seven factors were organized. A customized water plate phantom was specially designed to emphasize the spatial resolution of gamma camera in real scanning and composed by lines and many non-concentric circles. Then, every group of data was collected three time to ensure the reproducibility in each combination and analyzed to derive averaged grade, statistical fluctuation and derived S/N.Result: The optimal factor combination was distance of scan is 5cm, collimator type is LEHR；energy width is 30%；energy peak is 150keV；counts is 800K；zoom is 1.23 and Matrix size is 256 * 256. The optimal suggestion was verified by 30 patients from clinical examinations and gained large improvement from practical viewpoint. The derived grade from optimal setting was 0.57 higher than the one from conventional setting. Conclusions: The Taguchi analysis was proved as a convincible technique in optimizing routine nuclear examination.