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Effective dose determination using an anthropomorphic phantom and metal oxide semiconductor field effect transistor technology for clinical adult body multidetector array computed tomography protocols.
J Comput Assist Tomogr. 2007 Jul-Aug; 31(4):544-9.JC

Abstract

PURPOSE

To determine the organ doses and total body effective dose (ED) delivered to an anthropomorphic phantom by multidetector array computed tomography (MDCT) when using standard clinical adult body imaging protocols.

MATERIALS AND METHODS

Metal oxide semiconductor field effect transistor (MOSFET) technology was applied during the scanning of a female anthropomorphic phantom to determine 20 organ doses delivered during clinical body computed tomography (CT) imaging protocols. A 16-row MDCT scanner (LightSpeed, General Electric Healthcare, Milwaukee, Wis) was used. Effective dose was calculated as the sum of organ doses multiplied by a weighting factor determinant found in the International Commission on Radiological Protection Publication 60. Volume CT dose index and dose length product (DLP) values were recorded at the same time for the same scan.

RESULTS

Effective dose (mSv) for body MDCT imaging protocols were as follows: standard chest CT, 6.80 +/- 0.6; pulmonary embolus CT, 13.7 +/- 0.4; gated coronary CT angiography, 20.6 +/- 0.4; standard abdomen and pelvic CT, 13.3 + 1.0; renal stone CT, 4.51 + 0.45. Effective dose calculated by direct organ measurements in the phantom was 14% to 37% greater than those determined by the DLP method.

CONCLUSIONS

Effective dose calculated by the DLP method underestimates ED as compared with direct organ measurements for the same CT examination. Organ doses and total body ED are higher than previously reported for MDCT clinical body imaging protocols.

Authors+Show Affiliations

Department of Radiology, Duke University Medical Center, Durham, NC 27710, USA. hurwi001@mc.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

17882029

Citation

Hurwitz, Lynne M., et al. "Effective Dose Determination Using an Anthropomorphic Phantom and Metal Oxide Semiconductor Field Effect Transistor Technology for Clinical Adult Body Multidetector Array Computed Tomography Protocols." Journal of Computer Assisted Tomography, vol. 31, no. 4, 2007, pp. 544-9.
Hurwitz LM, Yoshizumi TT, Goodman PC, et al. Effective dose determination using an anthropomorphic phantom and metal oxide semiconductor field effect transistor technology for clinical adult body multidetector array computed tomography protocols. J Comput Assist Tomogr. 2007;31(4):544-9.
Hurwitz, L. M., Yoshizumi, T. T., Goodman, P. C., Frush, D. P., Nguyen, G., Toncheva, G., & Lowry, C. (2007). Effective dose determination using an anthropomorphic phantom and metal oxide semiconductor field effect transistor technology for clinical adult body multidetector array computed tomography protocols. Journal of Computer Assisted Tomography, 31(4), 544-9.
Hurwitz LM, et al. Effective Dose Determination Using an Anthropomorphic Phantom and Metal Oxide Semiconductor Field Effect Transistor Technology for Clinical Adult Body Multidetector Array Computed Tomography Protocols. J Comput Assist Tomogr. 2007 Jul-Aug;31(4):544-9. PubMed PMID: 17882029.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effective dose determination using an anthropomorphic phantom and metal oxide semiconductor field effect transistor technology for clinical adult body multidetector array computed tomography protocols. AU - Hurwitz,Lynne M, AU - Yoshizumi,Terry T, AU - Goodman,Philip C, AU - Frush,Donald P, AU - Nguyen,Giao, AU - Toncheva,Greta, AU - Lowry,Carolyn, PY - 2007/9/21/pubmed PY - 2007/10/6/medline PY - 2007/9/21/entrez SP - 544 EP - 9 JF - Journal of computer assisted tomography JO - J Comput Assist Tomogr VL - 31 IS - 4 N2 - PURPOSE: To determine the organ doses and total body effective dose (ED) delivered to an anthropomorphic phantom by multidetector array computed tomography (MDCT) when using standard clinical adult body imaging protocols. MATERIALS AND METHODS: Metal oxide semiconductor field effect transistor (MOSFET) technology was applied during the scanning of a female anthropomorphic phantom to determine 20 organ doses delivered during clinical body computed tomography (CT) imaging protocols. A 16-row MDCT scanner (LightSpeed, General Electric Healthcare, Milwaukee, Wis) was used. Effective dose was calculated as the sum of organ doses multiplied by a weighting factor determinant found in the International Commission on Radiological Protection Publication 60. Volume CT dose index and dose length product (DLP) values were recorded at the same time for the same scan. RESULTS: Effective dose (mSv) for body MDCT imaging protocols were as follows: standard chest CT, 6.80 +/- 0.6; pulmonary embolus CT, 13.7 +/- 0.4; gated coronary CT angiography, 20.6 +/- 0.4; standard abdomen and pelvic CT, 13.3 + 1.0; renal stone CT, 4.51 + 0.45. Effective dose calculated by direct organ measurements in the phantom was 14% to 37% greater than those determined by the DLP method. CONCLUSIONS: Effective dose calculated by the DLP method underestimates ED as compared with direct organ measurements for the same CT examination. Organ doses and total body ED are higher than previously reported for MDCT clinical body imaging protocols. SN - 0363-8715 UR - https://www.unboundmedicine.com/medline/citation/17882029/Effective_dose_determination_using_an_anthropomorphic_phantom_and_metal_oxide_semiconductor_field_effect_transistor_technology_for_clinical_adult_body_multidetector_array_computed_tomography_protocols_ L2 - https://doi.org/10.1097/RCT.0b013e31802d3dd2 DB - PRIME DP - Unbound Medicine ER -