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http://dx.doi.org/10.5392/JKCA.2013.13.06.331

Evaluation of Image Quality and dose with the Change of kVp and BMI in the Liver CT  

Kim, Dong-Hyun (부산가톨릭대학교 보건과학대학 방사선학과)
Ko, Sung-Jin (부산가톨릭대학교 보건과학대학 방사선학과)
Kang, Se-Sik (부산가톨릭대학교 보건과학대학 방사선학과)
Kim, Jung-Hoon (부산가톨릭대학교 보건과학대학 방사선학과)
Choi, Seok-Yoon (부산가톨릭대학교 보건과학대학 방사선학과)
Kim, Changsoo (부산가톨릭대학교 보건과학대학 방사선학과)
Publication Information
The Journal of the Korea Contents Association / v.13, no.6, 2013 , pp. 331-338 More about this Journal
Abstract
CT for follow-up visits because of liver disease, body mass index (BMI) and kVp according to the change of the image quality and radiation dose to evaluate for changes. March 2010 to June 2011 at Pusan P University Hospital, abdominal CT scans a patient BMI (Body Mass Index. Less BMI) index was less than 25 in the treatment of subjects had a 48-person Noise and SNR at 100kVp abdominal image is lager than the 120kVp image. CTDI volume value at by the analysis of the radiation dose is 4.47mGy(100kVp) and 9.01mGy(120kVp). So CTDIvol in 100kVp is smaller than CTDIvol in 120kVp(decrease by 44.1%). And, effective dose is 7.1mSv(100kVp) and 12.51mSv(120kVp). So effective dose in 100kVp is smaller than effective dose in 120kVp(decrease by 43%). Evaluation of image quality is that Unacceptable 0 person, Suboptimal 0 person, Adequate 0 person, Good 1 person, Excellent 47 person. In case of repeatly patient, we examinate abdomianl CT scan by using low kVp and body mass index less than 25. We can has good quality image and benefit of low radiation dose.
Keywords
kVp; BMI; CTDI; DLP;
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