Radiation dose for routine clinical adult brain CT: Variability on different scanners at one institution

AJR. American Journal of Roentgenology
Tracy A JaffeCarl E Ravin

Abstract

The purpose of this study was to determine, using an anthropomorphic phantom, whether patients are subject to variable radiation doses based on scanner assignment for routine CT of the brain. Twenty metal oxide semiconductor field effect transistor dosimeters were placed in the brain of a male anthropomorphic phantom scanned three times with a routine clinical brain CT protocol on four scanners from one manufacturer in four configurations and on one 64-MDCT scanner from another manufacturer. Absorbed organ doses were measured for skin, cranium, brain, lens of the eye, mandible, and thyroid. Effective dose was calculated on the basis of the dose-length product recorded on each scanner. Organ dose ranges were as follows: cranium, 2.57-3.47 cGy; brain, 2.34-3.78 cGy; lens, 2.51-5.03 cGy; mandible 0.17-0.48 cGy; and thyroid, 0.03-0.28 cGy. Statistically significant differences between scanners with respect to dose were recorded for brain and lens (p < 0.05). Absorbed doses were lowest on the single-detector scanner. In the comparison of MDCT scanners, the highest doses were found on the 4-MDCT scanner and the dual-source 64-MDCT scanner not capable of gantry tilt. Effective dose ranged from 1.22 to 1.86 mSv. According to the phanto...Continue Reading

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Sep 23, 2009·AJR. American Journal of Roentgenology·Tracy A JaffeCarl E Ravin

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Citations

Nov 7, 2012·Medical Physics·Olav ChristiansonEhsan Samei
Dec 30, 2014·AJR. American Journal of Roentgenology·Ulla NikupaavoMika Kortesniemi
Oct 25, 2011·AJR. American Journal of Roentgenology·Jenny K HoangLynne M Hurwitz
May 13, 2017·Radiation Protection Dosimetry·Masoumeh ParsiReza Paydar
May 18, 2012·Journal of Computer Assisted Tomography·Anja Judith ReimannSavvas Nicolaou
Jan 25, 2021·BMC Surgery·Vlastimil NovákCsaba Hučko
Aug 24, 2021·Radiation Protection Dosimetry·Mohamed M AbuzaidD A Bradley

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