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KMID : 1151820150090060337
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Journal of the Korean Society of Radiology
2015 Volume.9 No. 6 p.337 ~ p.342
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Study on Image Quality and Radiation Dose due to the Arm Position in the Abdomen/Pelvis CT
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Lee Jong-Woong
Won Do-Yeon
Jung Jae-Eun
Kim Hyeong-Gyun
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Abstract
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The one-year-follow-up test of abdomen/pelvis from 10 patients who were scanned more than twice a years were analyzed the radiation dose and image quality depend on the position of the arm retrospectively from January to December in 2013. There were classified two groups, group A was examined with raising an arm on standard position and group B was performed with lowering an arm, respectively. Group A of an average mAs from the first dose amount was shown 11.4% less compared to Group B. And the value of CTDI from Group B also was investigated 11.3% less. To compare the quality comparison of the second image as histogram value, the value of max from both of two groups was measured similarly. However, a big difference was shown from the value of min and SD, the short dose was appeared depends on the position of arm even though Group A was radiated more than Group B. Less exposure to the medical image quality only by working CT scan when the examiner actively raise the arm before the development and testing of high-end equipment introduction of complex algorithms for obtaining an optimized image will be provided to the patient.
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KEYWORD
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mAs, CTDI, histogram, Standard Deviation
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