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Evaluation of patient effective dose of neurovascular imaging protocols for C-arm cone-beam CT.

Publication ,  Journal Article
Wang, C; Nguyen, G; Toncheva, G; Jiang, X; Ferrell, A; Smith, T; Yoshizumi, T
Published in: AJR Am J Roentgenol
May 2014

OBJECTIVE: The purpose of this study was threefold: to estimate the organ doses and effective doses (EDs) for seven neurovascular imaging protocols, to study the effect of beam collimation on ED, and to derive protocol-specific dose-area product (DAP)-to-ED conversion factors. MATERIALS AND METHODS: A cone-beam CT system was used to measure the organ doses for seven neurovascular imaging protocols. Two datasets were obtained: seven protocols without beam collimation (FOV, entire head) and four with beam collimation (FOV, from the base to the top of the skull). Measurements were performed on an adult male anthropomorphic phantom with 20 metal oxide semiconductor field-effect transistor (MOSFET) detectors placed in selected organs. The DAP values were recorded from the console. The EDs of five protocols were also estimated using Monte Carlo simulations software. The ED values were computed by multiplying measured organ doses to corresponding International Commission on Radiological Protection tissue-weighting factors. RESULTS: Without collimation, the EDs ranged from 0.16 to 1.6 mSv, and the DAP-to-ED conversion factors ranged from 0.035 to 0.076 mSv/Gy·cm(2). For the four protocols investigated with beam collimation, the ED was reduced by a factor of approximately 2, and the DAP-to-ED conversion factors were reduced by approximately 30%. For the five protocols also estimated with the Monte Carlo method, the estimated EDs were in agreement (< 20% deviation) with those determined by the MOSFET method. CONCLUSION: We have estimated ED for standard adult neuroimaging protocols in a 3D rotational angiography system. Our results provide a simple means of ED estimation using DAP console readings.

Duke Scholars

Published In

AJR Am J Roentgenol

DOI

EISSN

1546-3141

Publication Date

May 2014

Volume

202

Issue

5

Start / End Page

1072 / 1077

Location

United States

Related Subject Headings

  • Radiation Dosage
  • Phantoms, Imaging
  • Nuclear Medicine & Medical Imaging
  • Neuroimaging
  • Monte Carlo Method
  • Male
  • Humans
  • Cone-Beam Computed Tomography
  • Clinical Protocols
  • Angiography
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Wang, C., Nguyen, G., Toncheva, G., Jiang, X., Ferrell, A., Smith, T., & Yoshizumi, T. (2014). Evaluation of patient effective dose of neurovascular imaging protocols for C-arm cone-beam CT. AJR Am J Roentgenol, 202(5), 1072–1077. https://doi.org/10.2214/AJR.13.11001
Wang, Chu, Giao Nguyen, Greta Toncheva, Xianxian Jiang, Andrew Ferrell, Tony Smith, and Terry Yoshizumi. “Evaluation of patient effective dose of neurovascular imaging protocols for C-arm cone-beam CT.AJR Am J Roentgenol 202, no. 5 (May 2014): 1072–77. https://doi.org/10.2214/AJR.13.11001.
Wang C, Nguyen G, Toncheva G, Jiang X, Ferrell A, Smith T, et al. Evaluation of patient effective dose of neurovascular imaging protocols for C-arm cone-beam CT. AJR Am J Roentgenol. 2014 May;202(5):1072–7.
Wang, Chu, et al. “Evaluation of patient effective dose of neurovascular imaging protocols for C-arm cone-beam CT.AJR Am J Roentgenol, vol. 202, no. 5, May 2014, pp. 1072–77. Pubmed, doi:10.2214/AJR.13.11001.
Wang C, Nguyen G, Toncheva G, Jiang X, Ferrell A, Smith T, Yoshizumi T. Evaluation of patient effective dose of neurovascular imaging protocols for C-arm cone-beam CT. AJR Am J Roentgenol. 2014 May;202(5):1072–1077.

Published In

AJR Am J Roentgenol

DOI

EISSN

1546-3141

Publication Date

May 2014

Volume

202

Issue

5

Start / End Page

1072 / 1077

Location

United States

Related Subject Headings

  • Radiation Dosage
  • Phantoms, Imaging
  • Nuclear Medicine & Medical Imaging
  • Neuroimaging
  • Monte Carlo Method
  • Male
  • Humans
  • Cone-Beam Computed Tomography
  • Clinical Protocols
  • Angiography