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The comparison of radiation dose between C-arm flat-detector CT (DynaCT) and multi-slice CT (MSCT): a phantom study.
Eur J Radiol. 2012 Nov; 81(11):3577-80.EJ

Abstract

PURPOSE

To assess and compare the radiation dose of DynaCT in phantoms to that of MSCT.

METHODS AND MATERIALS

A male Anderson Radiation Therapy 200 phantom with embedded thermoluminescence dosimeters (TLDs) was scanned with DynaCT (Axiom Artis dTA, Siemens Healthcare, Forchheim, Germany) and MSCTs (MSCT1: Lightspeed VCT, GE, Milwaukee, USA; MSCT2: Sensation Cardiac 64, Siemens Healthcare, Erlangen, Germany), respectively. For DynaCT, radiation exposure data with automatic exposure control were obtained from scanning of head, chest and abdomen. For MSCT, scanning protocols for head, chest, and abdomen were examined under conventional exposure conditions. Effective doses were calculated from LiF-TLD measurements according to ICRP103. A Catphan phantom (Phantom Lab, USA) was used to evaluate the spatial resolution and low contrast detectability of DynaCT and MSCT.

RESULTS

The effective doses for DynaCT from head, chest and abdomen scanning were 1.18, 7.32, 7.48 mSv (20 s scan) and 0.85, 6.01, 7.04 mSv (8 s scan); the effective doses for MSCT from head, chest and abdomen scanning were 3.33, 7.62 and 8.42 mSv (MSCT1), and 1.89, 7.52, 8.23 mSv (MSCT2). Significant difference between the organ doses from DynaCT and from MSCT (p<.05) was shown. The spatial resolution of 12 lp/cm was achieved and it was able to recognize a 3mm low contrast object at 0.5% contrast level in DynaCT, which was on the same level as in the MSCT images.

CONCLUSION

The phantom study indicates that DynaCT applies significantly less dose to patient and achieves similar spatial resolution and low contrast detectability to standard diagnostic MSCT.

Authors+Show Affiliations

Department of Biomedical Engineering, Xuanwu Hospital of Capital Medical University, No. 45 Changchun Street, Beijing 100053, PR China. baimei12@yahoo.comNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

21963617

Citation

Bai, Mei, et al. "The Comparison of Radiation Dose Between C-arm Flat-detector CT (DynaCT) and Multi-slice CT (MSCT): a Phantom Study." European Journal of Radiology, vol. 81, no. 11, 2012, pp. 3577-80.
Bai M, Liu B, Mu H, et al. The comparison of radiation dose between C-arm flat-detector CT (DynaCT) and multi-slice CT (MSCT): a phantom study. Eur J Radiol. 2012;81(11):3577-80.
Bai, M., Liu, B., Mu, H., Liu, X., & Jiang, Y. (2012). The comparison of radiation dose between C-arm flat-detector CT (DynaCT) and multi-slice CT (MSCT): a phantom study. European Journal of Radiology, 81(11), 3577-80. https://doi.org/10.1016/j.ejrad.2011.09.006
Bai M, et al. The Comparison of Radiation Dose Between C-arm Flat-detector CT (DynaCT) and Multi-slice CT (MSCT): a Phantom Study. Eur J Radiol. 2012;81(11):3577-80. PubMed PMID: 21963617.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - The comparison of radiation dose between C-arm flat-detector CT (DynaCT) and multi-slice CT (MSCT): a phantom study. AU - Bai,Mei, AU - Liu,Bin, AU - Mu,Hongqiu, AU - Liu,Xianghua, AU - Jiang,Yuan, Y1 - 2011/10/02/ PY - 2011/07/25/received PY - 2011/09/06/revised PY - 2011/09/10/accepted PY - 2011/10/4/entrez PY - 2011/10/4/pubmed PY - 2013/3/23/medline SP - 3577 EP - 80 JF - European journal of radiology JO - Eur J Radiol VL - 81 IS - 11 N2 - PURPOSE: To assess and compare the radiation dose of DynaCT in phantoms to that of MSCT. METHODS AND MATERIALS: A male Anderson Radiation Therapy 200 phantom with embedded thermoluminescence dosimeters (TLDs) was scanned with DynaCT (Axiom Artis dTA, Siemens Healthcare, Forchheim, Germany) and MSCTs (MSCT1: Lightspeed VCT, GE, Milwaukee, USA; MSCT2: Sensation Cardiac 64, Siemens Healthcare, Erlangen, Germany), respectively. For DynaCT, radiation exposure data with automatic exposure control were obtained from scanning of head, chest and abdomen. For MSCT, scanning protocols for head, chest, and abdomen were examined under conventional exposure conditions. Effective doses were calculated from LiF-TLD measurements according to ICRP103. A Catphan phantom (Phantom Lab, USA) was used to evaluate the spatial resolution and low contrast detectability of DynaCT and MSCT. RESULTS: The effective doses for DynaCT from head, chest and abdomen scanning were 1.18, 7.32, 7.48 mSv (20 s scan) and 0.85, 6.01, 7.04 mSv (8 s scan); the effective doses for MSCT from head, chest and abdomen scanning were 3.33, 7.62 and 8.42 mSv (MSCT1), and 1.89, 7.52, 8.23 mSv (MSCT2). Significant difference between the organ doses from DynaCT and from MSCT (p<.05) was shown. The spatial resolution of 12 lp/cm was achieved and it was able to recognize a 3mm low contrast object at 0.5% contrast level in DynaCT, which was on the same level as in the MSCT images. CONCLUSION: The phantom study indicates that DynaCT applies significantly less dose to patient and achieves similar spatial resolution and low contrast detectability to standard diagnostic MSCT. SN - 1872-7727 UR - https://www.unboundmedicine.com/medline/citation/21963617/The_comparison_of_radiation_dose_between_C_arm_flat_detector_CT__DynaCT__and_multi_slice_CT__MSCT_:_a_phantom_study_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0720-048X(11)00688-7 DB - PRIME DP - Unbound Medicine ER -