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Estimation of organ and effective dose to the patient during spinal surgery with a cone-beam O-arm system

Söderberg, Marcus LU ; Abul-Kasim, Kasim LU ; Ohlin, Acke LU and Gunnarsson, Mikael LU (2011) Conference on Medical Imaging - Physics of Medical Imaging, 2011 In Medical Imaging 2011: Physics of Medical Imaging 7961. p.79613-79613
Abstract
The purpose of this study was to estimate organ and effective dose to the patient during spinal surgery with a cone-beam O-arm system. The absorbed dose to radiosensitive organs and effective dose were calculated on mathematically simulated phantom corresponding to a 15-year-old patient using PCXMC 2.0. Radiation doses were calculated at every 15 degrees of the x-ray tube projection angle at two regions: thoracic spine and lumbar spine. Two different scan settings were investigated: 120 kV/128 mAs (standard) and 80 kV/80 mAs (low-dose). The effect on effective dose by changing the number of simulated projection angles (24, 12 and 4) was investigated. Estimated effective dose with PCXMC was compared with calculated effective dose using... (More)
The purpose of this study was to estimate organ and effective dose to the patient during spinal surgery with a cone-beam O-arm system. The absorbed dose to radiosensitive organs and effective dose were calculated on mathematically simulated phantom corresponding to a 15-year-old patient using PCXMC 2.0. Radiation doses were calculated at every 15 degrees of the x-ray tube projection angle at two regions: thoracic spine and lumbar spine. Two different scan settings were investigated: 120 kV/128 mAs (standard) and 80 kV/80 mAs (low-dose). The effect on effective dose by changing the number of simulated projection angles (24, 12 and 4) was investigated. Estimated effective dose with PCXMC was compared with calculated effective dose using conversion factors between dose length product (DLP) and effective dose. The highest absorbed doses were received by the breast, lungs (thoracic spine) and stomach (lumbar spine). The effective doses using standard settings were 5 times higher than those delivered with low-dose settings (2-3 scans: 7.9-12 mSv versus 1.5-2.4 mSv). There was no difference in estimated effective dose using 24 or 12 projection angles. Using 4 projection angles at every 90 degrees was not enough to accurate simulate the x-ray tube rotating around the patient. Conversion factors between DLP and effective dose were determined. Our conclusion is that the O-arm has the potential to deliver high radiation doses and consequently there is a strong need to optimize the clinical scan protocols. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
cone-beam CT, radiation dosimetry, organ dose, effective dose
in
Medical Imaging 2011: Physics of Medical Imaging
volume
7961
pages
79613 - 79613
publisher
SPIE
conference name
Conference on Medical Imaging - Physics of Medical Imaging, 2011
external identifiers
  • wos:000294178500115
  • scopus:79955763425
ISSN
1996-756X
0277-786X
DOI
10.1117/12.873369
language
English
LU publication?
yes
id
9698695d-3e5b-4288-ad8d-52f35c26fe77 (old id 2187284)
date added to LUP
2011-10-24 09:59:21
date last changed
2017-11-20 15:05:50
@inproceedings{9698695d-3e5b-4288-ad8d-52f35c26fe77,
  abstract     = {The purpose of this study was to estimate organ and effective dose to the patient during spinal surgery with a cone-beam O-arm system. The absorbed dose to radiosensitive organs and effective dose were calculated on mathematically simulated phantom corresponding to a 15-year-old patient using PCXMC 2.0. Radiation doses were calculated at every 15 degrees of the x-ray tube projection angle at two regions: thoracic spine and lumbar spine. Two different scan settings were investigated: 120 kV/128 mAs (standard) and 80 kV/80 mAs (low-dose). The effect on effective dose by changing the number of simulated projection angles (24, 12 and 4) was investigated. Estimated effective dose with PCXMC was compared with calculated effective dose using conversion factors between dose length product (DLP) and effective dose. The highest absorbed doses were received by the breast, lungs (thoracic spine) and stomach (lumbar spine). The effective doses using standard settings were 5 times higher than those delivered with low-dose settings (2-3 scans: 7.9-12 mSv versus 1.5-2.4 mSv). There was no difference in estimated effective dose using 24 or 12 projection angles. Using 4 projection angles at every 90 degrees was not enough to accurate simulate the x-ray tube rotating around the patient. Conversion factors between DLP and effective dose were determined. Our conclusion is that the O-arm has the potential to deliver high radiation doses and consequently there is a strong need to optimize the clinical scan protocols.},
  author       = {Söderberg, Marcus and Abul-Kasim, Kasim and Ohlin, Acke and Gunnarsson, Mikael},
  booktitle    = {Medical Imaging 2011: Physics of Medical Imaging},
  issn         = {1996-756X},
  keyword      = {cone-beam CT,radiation dosimetry,organ dose,effective dose},
  language     = {eng},
  pages        = {79613--79613},
  publisher    = {SPIE},
  title        = {Estimation of organ and effective dose to the patient during spinal surgery with a cone-beam O-arm system},
  url          = {http://dx.doi.org/10.1117/12.873369},
  volume       = {7961},
  year         = {2011},
}