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Dual energy versus single energy MDCT: measurement of radiation dose using adult abdominal imaging protocols.
Acad Radiol. 2009 Nov; 16(11):1400-7.AR

Abstract

RATIONALE AND OBJECTIVES

The aim of this study was to measure the radiation dose of dual-energy and single-energy multidetector computed tomographic (CT) imaging using adult liver, renal, and aortic imaging protocols.

MATERIALS AND METHODS

Dual-energy CT (DECT) imaging was performed on a conventional 64-detector CT scanner using a software upgrade (Volume Dual Energy) at tube voltages of 140 and 80 kVp (with tube currents of 385 and 675 mA, respectively), with a 0.8-second gantry revolution time in axial mode. Parameters for single-energy CT (SECT) imaging were a tube voltage of 140 kVp, a tube current of 385 mA, a 0.5-second gantry revolution time, helical mode, and pitch of 1.375:1. The volume CT dose index (CTDI(vol)) value displayed on the console for each scan was recorded. Organ doses were measured using metal oxide semiconductor field-effect transistor technology. Effective dose was calculated as the sum of 20 organ doses multiplied by a weighting factor found in International Commission on Radiological Protection Publication 60. Radiation dose saving with virtual noncontrast imaging reconstruction was also determined.

RESULTS

The CTDI(vol) values were 49.4 mGy for DECT imaging and 16.2 mGy for SECT imaging. Effective dose ranged from 22.5 to 36.4 mSv for DECT imaging and from 9.4 to 13.8 mSv for SECT imaging. Virtual noncontrast imaging reconstruction reduced the total effective dose of multiphase DECT imaging by 19% to 28%.

CONCLUSION

Using the current Volume Dual Energy software, radiation doses with DECT imaging were higher than those with SECT imaging. Substantial radiation dose savings are possible with DECT imaging if virtual noncontrast imaging reconstruction replaces precontrast imaging.

Authors+Show Affiliations

Department of Radiology, Box 3808, Duke University Medical Center, Durham, NC 27710, USA. lisa.ho@duke.eduNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

19596594

Citation

Ho, Lisa M., et al. "Dual Energy Versus Single Energy MDCT: Measurement of Radiation Dose Using Adult Abdominal Imaging Protocols." Academic Radiology, vol. 16, no. 11, 2009, pp. 1400-7.
Ho LM, Yoshizumi TT, Hurwitz LM, et al. Dual energy versus single energy MDCT: measurement of radiation dose using adult abdominal imaging protocols. Acad Radiol. 2009;16(11):1400-7.
Ho, L. M., Yoshizumi, T. T., Hurwitz, L. M., Nelson, R. C., Marin, D., Toncheva, G., & Schindera, S. T. (2009). Dual energy versus single energy MDCT: measurement of radiation dose using adult abdominal imaging protocols. Academic Radiology, 16(11), 1400-7. https://doi.org/10.1016/j.acra.2009.05.002
Ho LM, et al. Dual Energy Versus Single Energy MDCT: Measurement of Radiation Dose Using Adult Abdominal Imaging Protocols. Acad Radiol. 2009;16(11):1400-7. PubMed PMID: 19596594.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Dual energy versus single energy MDCT: measurement of radiation dose using adult abdominal imaging protocols. AU - Ho,Lisa M, AU - Yoshizumi,Terry T, AU - Hurwitz,Lynne M, AU - Nelson,Rendon C, AU - Marin,Daniele, AU - Toncheva,Greta, AU - Schindera,Sebastian T, Y1 - 2009/07/10/ PY - 2009/04/07/received PY - 2009/05/28/revised PY - 2009/05/29/accepted PY - 2009/7/15/entrez PY - 2009/7/15/pubmed PY - 2010/1/7/medline SP - 1400 EP - 7 JF - Academic radiology JO - Acad Radiol VL - 16 IS - 11 N2 - RATIONALE AND OBJECTIVES: The aim of this study was to measure the radiation dose of dual-energy and single-energy multidetector computed tomographic (CT) imaging using adult liver, renal, and aortic imaging protocols. MATERIALS AND METHODS: Dual-energy CT (DECT) imaging was performed on a conventional 64-detector CT scanner using a software upgrade (Volume Dual Energy) at tube voltages of 140 and 80 kVp (with tube currents of 385 and 675 mA, respectively), with a 0.8-second gantry revolution time in axial mode. Parameters for single-energy CT (SECT) imaging were a tube voltage of 140 kVp, a tube current of 385 mA, a 0.5-second gantry revolution time, helical mode, and pitch of 1.375:1. The volume CT dose index (CTDI(vol)) value displayed on the console for each scan was recorded. Organ doses were measured using metal oxide semiconductor field-effect transistor technology. Effective dose was calculated as the sum of 20 organ doses multiplied by a weighting factor found in International Commission on Radiological Protection Publication 60. Radiation dose saving with virtual noncontrast imaging reconstruction was also determined. RESULTS: The CTDI(vol) values were 49.4 mGy for DECT imaging and 16.2 mGy for SECT imaging. Effective dose ranged from 22.5 to 36.4 mSv for DECT imaging and from 9.4 to 13.8 mSv for SECT imaging. Virtual noncontrast imaging reconstruction reduced the total effective dose of multiphase DECT imaging by 19% to 28%. CONCLUSION: Using the current Volume Dual Energy software, radiation doses with DECT imaging were higher than those with SECT imaging. Substantial radiation dose savings are possible with DECT imaging if virtual noncontrast imaging reconstruction replaces precontrast imaging. SN - 1878-4046 UR - https://www.unboundmedicine.com/medline/citation/19596594/Dual_energy_versus_single_energy_MDCT:_measurement_of_radiation_dose_using_adult_abdominal_imaging_protocols_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S1076-6332(09)00299-2 DB - PRIME DP - Unbound Medicine ER -