| Summary: | 碩士 === 中臺科技大學 === 放射科學研究所 === 95 === This work demonstrated the effectiveness of an optimization of mammographic phantom image of quality characteristics using a digital X-ray device and Taguchi analysis. The destination for this research was trying to (1) compromise the graded index reached 70 to follow the MQSA suggestion, and (2) minimize the dose below 3mGy to fulfill the national default limit. The Taguchi methodology as applied herein was successfully compiled for either optimizing the X-ray setting or grading the integrated performance of quality characteristics following mammographic imaging. The critical parameters that determined the quality of a mammographic image were identified as the target nuclide, kVp, mAs and the FOV of the X-ray. The quality characteristics optimized herein included the high quality of a mammographic image and tolerable radiation dose. Mammographic phantom were shot and graded using various setting of a digital X-ray device. The optimized result were indicated as (1)Mo as target nuclide, (2)28kVp, (3)110mAs and (4)FOV 19×23 cm2. The dominant factor for mammography was kVp and the cross interactions between kVp and other factors were shown strong correlations with target nuclide and FOV. Thus, the tune-up adjust revised the optimized value to (1)Rh as target nuclide, (2)28kVp, (3)80mAs and (4)FOV 19×23 cm2. The verified evaluation also supported the new revised suggestion of mammography and upgraded the grade from 70.9 to 72.0. The corresponded dose was found to be 1.8mGy which was below the national limit, 3.0mGy. The limit was determined by the Department of Health in Taiwan.
|
|---|
