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Title: Computed tomography overexposure as a consequence of extended scan length.
Austin Authors: Badawy, Mohamed Khaldoun;Galea, Michael ;Mong, Kam Shan;U, Paul L
Affiliation: Department of Medical Physics, Austin Health, Heidelberg, Victoria, Australia
Department of Radiology, Austin Health, Heidelberg, Victoria, Australia
School of Medical Sciences, RMIT, Bundoora, Victoria, Australia
Issue Date: Oct-2015 2015-07-14
Publication information: Journal of Medical Imaging and Radiation Oncology 2015; 59(5): 586-9
Abstract: This study aimed to raise awareness around the increased effective dose as scan length chosen is increased from standard protocol The Monte Carlo-based software CT-Expo (G. Stamm (Medizinische Hochschule Hannover, Hannover, Germany) and H.D. Nagel (SASCRAD, Buchholz, Germany)) was used to simulate the effective dose increase as the scanned region of the standard protocol increased. The results of this study show that for scans with a high computed tomography dose index (CTDI)vol the patient could be exposed to an extra 1 mSv within 6 cm of overscan. Protocols that investigated large scan areas may not see a significant relative dose reduction because of the use of a lower CTDIvol ; however, radiation exposure should be kept as low as reasonably achievable. There is significant dose optimisation potential when strictly adhering to appropriate scan lengths within each imaging protocol wherever possible.
DOI: 10.1111/1754-9485.12339
ORCID: 0000-0001-8029-9951
PubMed URL: 26176642
Type: Journal Article
Subjects: CT dose optimisation
CT dose reduction
computed X-ray tomography
radiation dose
Appears in Collections:Journal articles

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