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KMID : 0357520160390010059
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Journal of Radiological Science and Technology
2016 Volume.39 No. 1 p.59 ~ p.69
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Analysis of Factors Influencing the Integrated Bolus Peak Timing in Contrast-Enhanced Brain Computed Tomographic Angiography
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Son Soon-Yong
Choi Kwan-Woo
Jeong Hoi-Woun
Jang Seo-Goo
Jung Jae-Yong
Yun Jung-Soo
Kim Ki-Won
Lee Young-Ah
Son Jin-Hyun
Min Jung-Whan
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Abstract
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The objective of this study was to analyze the factors influencing integrated bolus peak timing in contrast-enhanced computed tomographic angiography (CTA) and to determine a method of calculating personal peak time.
The optimal time was calculated by performing multiple linear regression analysis, after finding the influence factors through correlation analysis between integrated peak time of contrast medium and personal measured value by monitoring CTA scans. The radiation exposure dose in CTA was 716.53 mGy?cm and the radiation exposure dose in monitoring scan was 15.52 mGy (2 - 34 mGy). The results were statistically significant (p < .01). Regression analysis revealed, a -0.160 times decrease with a one-step increase in heart rate in male, and -0.004, -0.174, and 0.006 times decrease with one-step in DBP, heart rate, and blood sugar, respectively, in female. In a consistency test of peak time by calculating measured peak time and peak time by using the regression equation, the consistency was determined to be very high for male and female. This study could prevent unnecessary dose exposure by encouraging in clinic calculation of personal integrated
peak time of contrast medium prior to examination.
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KEYWORD
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Test bolus method (TBM) , Bolus tracking method (BTM) , Monitoring scan
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