CT 팬텀 영상에서 관전압, 관전류 변화에 따른 선량비교
Dose comparison according to the tube voltage, the tube current change in CT image
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Recently, as the phenomenon of radiation exposure gain high medical interest, an effort to reduce the dose of radioactivity resulted in the development of Auto Exposure Control Mode (AEC). In the study above, a test for efficiency and reliability of AEC, has been researched through the application of Rondo phantom and SIEMENS CT equipment used in C univeristy to ACE care KV and Care dose 4D. CTDIvol which Indicators of average radiation dose scan volume in units, The total dose values DLP, The Effective mAs which value weighted according to each organ are measured to compare comparison by part when the tube current and tube voltage are manual (Fixed), when only the tube current are automatic (Care dose 4D), when the tube current and tube voltage are all automatical. The values of DLP has decreased in case of Neck, in care dose 4D 26.98%, Mixed 32.32%, in case of Chest, in care dose 4D 4.21%, Mixed 4.56% than Fixed. And the values has decreased equally in case of Abdomen, care dose 4D 45.23%, Mixed 45.23% than Fixed. When only the tube current are automatic, dose reduction is warranted, but when the tube current and tube voltage are all automatical, dose was slightly lower than what we expected.
Abstract
Recently, as the phenomenon of radiation exposure gain high medical interest, an effort to reduce the dose of radioactivity resulted in the development of Auto Exposure Control Mode (AEC). In the study above, a test for efficiency and reliability of AEC, has been researched through the application of Rondo phantom and SIEMENS CT equipment used in C univeristy to ACE care KV and Care dose 4D. CTDIvol which Indicators of average radiation dose scan volume in units, The total dose values DLP, The Effective mAs which value weighted according to each organ are measured to compare comparison by part when the tube current and tube voltage are manual (Fixed), when only the tube current are automatic (Care dose 4D), when the tube current and tube voltage are all automatical. The values of DLP has decreased in case of Neck, in care dose 4D 26.98%, Mixed 32.32%, in case of Chest, in care dose 4D 4.21%, Mixed 4.56% than Fixed. And the values has decreased equally in case of Abdomen, care dose 4D 45.23%, Mixed 45.23% than Fixed. When only the tube current are automatic, dose reduction is warranted, but when the tube current and tube voltage are all automatical, dose was slightly lower than what we expected.
참고문헌 (15)
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