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KMID : 1131320160180020007
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Journal of Korean Society of Computed Tomographic Technology
2016 Volume.18 No. 2 p.7 ~ p.12
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When Care kV is applied in chest : abdominal CT scan Studies on the reduction of patient dose
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Kim Seong-Hwan
Kim Geon-Tae
Jeong Jin-Su
Lee Tae-Man
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Abstract
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Objectives : To investigate the relationship between chest computed tomography (CT) and abdominal computed tomography (CT) in patients with hematologic malignancies. AEC is applied to reduce the amount of radiation exposure, and we compare the radiation doses of patients exposed to chest CT and abdominal CT scans using Care kV from FY2015.
Methods : The CT system was developed using Somatom Definition AS + (Siemens, Erlangen, Germany) and was applied to patients who visited t he hematologic department of this specification from June 2014 to June 2015 The average age of 52 patients aged 21 to 78 years with 10 males and 20 females in 30 randomized, 2014 (control group) and 2015 (experimental group) Were analyzed and analyzed. One of the radiologist of chest and one of the radiologist of abdominal evaluated each of the CT images of 2014 and 2015 and evaluated them in five stages (Unacceptable, Suboptimal, Adequate, Good, Excellent). Female Rando Phantom was used in the same way and the CTDlvoL and DLP values displayed in the Dose report were compared when analyzing the exposure dose.
Results : In the clinical study, the tube voltage was lower at 100 kVp in the experimental group compared with the control group, the tube current increased by 31.11 %, the CTDlvOL decreased by 23.84%, and the DLP decreased by 24.03%. The video evaluation of the experimental group was evaluated by 30 Unacceptable, 0 Suboptimal, 0 Adequate, 25 Good, and 5 Excellent. In the study of the phantom, the tube voltage was lower at 100 kVp in the experimental group than in the control group. The tube current increased by 37.64%, CTDlvOL decreased by 18.99%, and DLP decreased by 19.25%.
Conclusion : Care kV can be applied to my desired patient for periodic screening to reduce the amount of radiation that can be seen without altering the quality of the image when chest CT and abdominal CT scan is performed.
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KEYWORD
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Care kV, exposure dose, CTDI, DLP
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