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http://dx.doi.org/10.14400/JDC.2014.12.3.353

A Study on the Mitigation of the Exposure Dose Applying Bolus Tracking in Brain Perfusion CT Scan  

Kim, Ki-Jeong (Dept. of Health Care, Hanseo University)
Jung, Hong-Ryang (Dept. of Diagnostic Radiology, Konkuk University Hospital)
Lim, Cheong-Hwan (Dept. of Diagnostic Radiology, Konkuk University Hospital)
Hong, Dong-Hee (Dept. of Diagnostic Radiology, Konkuk University Hospital)
Shim, Jae-Goo (Dept. of Diagnostic Radiology, Konkuk University Hospital)
You, In-Gyu (Dept. of Diagnostic Radiology, Konkuk University Hospital)
Publication Information
Journal of Digital Convergence / v.12, no.3, 2014 , pp. 353-358 More about this Journal
Abstract
This study was conducted to analyze the patient's exposed dose targeting the patients who had acute ischemic stroke symptoms and CT brain perfusion scan, by comparing fixed time technique and bolus tracking technique which was provided by the manufacturer and to identify the Time graph to implement the usability of contrast medium's tracking technique the best contrast enhancement intervals. $CTDI_{VOL}$ of PCT in patient appeared to be 431.72mGy in fixed scan delay protocol, whereas 323.61mGy in Bolus tracking technique. The value of DLP appeared to be $1243.47mGy{\cdot}cm$ in fixed scan delay protocol, whereas $932mGy{\cdot}cm$ in Bolus tracking technique. Time graph appeared to be various in fixed scan delay protocol, whereas the optimal time graph could be obtained in Bolus tracking. The exposure dose could be reduced by 25% applying Bolus tracking technique when taking brain perfusion CT scan.
Keywords
Perfusion CT; Bolus tracking; Fixed time technique; Dose; Time graph;
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