TY - JOUR
T1 - Precision of determining bone pose and marker position in the foot and lower leg from computed tomography scans: How low can we go in radiation dose?
AU - Schallig, W.
AU - van den Noort, J. C.
AU - Kleipool, R. P.
AU - Dobbe, J. G. G.
AU - van der Krogt, M. M.
AU - Harlaar, J.
AU - Maas, M.
AU - Streekstra, G. J.
N1 - Publisher Copyright: © 2019 Copyright: Copyright 2019 Elsevier B.V., All rights reserved.
PY - 2019/7/1
Y1 - 2019/7/1
N2 - Computed tomography (CT) imaging can be used to determine bone pose, sometimes combined with skin-mounted markers. For this specific application, a lower radiation dose than the conventional clinical dose might suffice. This study aims to determine how lowering the radiation dose of a CT-scan of the ankle and foot affects the precision of detecting bone pose and marker position. Radiation dose is proportional to tube charge. Hence, an adult cadaveric leg was scanned 10 times at four different tube charges (150, 75, 50 and 20 mAs) with a Philips Brilliance 64 CT scanner. Precision of detecting bone and marker position at 50 mAs was not significantly different from 75 mAs and from the clinically used 150 mAs, but higher than 20 mAs. Furthermore, no differences of the precision in detecting bone orientation were found. These results indicate that the radiation dose can be reduced by a factor 3 compared to the clinically usual radiation dose, without affecting the precision of detecting bone pose and marker position in the foot and ankle.
AB - Computed tomography (CT) imaging can be used to determine bone pose, sometimes combined with skin-mounted markers. For this specific application, a lower radiation dose than the conventional clinical dose might suffice. This study aims to determine how lowering the radiation dose of a CT-scan of the ankle and foot affects the precision of detecting bone pose and marker position. Radiation dose is proportional to tube charge. Hence, an adult cadaveric leg was scanned 10 times at four different tube charges (150, 75, 50 and 20 mAs) with a Philips Brilliance 64 CT scanner. Precision of detecting bone and marker position at 50 mAs was not significantly different from 75 mAs and from the clinically used 150 mAs, but higher than 20 mAs. Furthermore, no differences of the precision in detecting bone orientation were found. These results indicate that the radiation dose can be reduced by a factor 3 compared to the clinically usual radiation dose, without affecting the precision of detecting bone pose and marker position in the foot and ankle.
KW - Biomechanics
KW - Computed tomography
KW - Dose reduction
KW - Foot
KW - Movement analysis
KW - Registration
KW - Segmentation
KW - Skin-mounted markers
UR - http://www.scopus.com/inward/record.url?scp=85066088029&partnerID=8YFLogxK
UR - https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85066088029&origin=inward
UR - https://www.ncbi.nlm.nih.gov/pubmed/31147203
U2 - https://doi.org/10.1016/j.medengphy.2019.05.004
DO - https://doi.org/10.1016/j.medengphy.2019.05.004
M3 - Article
C2 - 31147203
SN - 1350-4533
VL - 69
SP - 147
EP - 152
JO - Medical Engineering and Physics
JF - Medical Engineering and Physics
ER -