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Radiation dose to the fetus from body MDCT during early gestation.
AJR Am J Roentgenol. 2006 Mar; 186(3):871-6.AA

Abstract

OBJECTIVE

The purpose of our study was to determine radiation dose to the fetus at early gestation when contemporary MDCT scanners are used for common clinical indications.

MATERIALS AND METHODS

Anthropomorphic phantoms were constructed to reflect a pregnant woman. Thermoluminescence dosimeters (TLDs) and metal oxide semiconductor field effect transistor (MOSFET) detectors were placed in appropriate locations to determine real-time radiation exposure to the fetus at 0 and 3 months' gestation. Imaging was performed on a 16-MDCT scanner using current institutional CT protocols: renal stone (140 kVp, 160 mA, rotation time of 0.5 sec, 16 x 0.625 mm), appendix (140 kVp, 340 mA, rotation time of 0.5 sec, 16 x 0.625 mm), and pulmonary embolus (140 kVp, 380 mA, rotation time of 0.8 sec, 16 x 1.25 mm).

RESULTS

The radiation dose to the fetus at 0 and 3 months, respectively, was as follows: renal stone protocol, 0.8-1.2 and 0.4-0.7 cGy; appendix protocol, 1.52-1.68 and 2-4 cGy; and pulmonary embolus protocol, 0.024-0.047 and 0.061-0.066 cGy.

CONCLUSION

Radiation doses to the fetus from institutional MDCT protocols that may be used during pregnancy (for pulmonary embolus, appendicitis, and renal colic) are below the level thought to induce neurologic detriment to the fetus. Imaging the mother for appendicitis theoretically may double the fetal risk for developing a childhood cancer. Radiation doses to the fetus from pulmonary embolus chest CT angiography are of the same magnitude as ventilation-perfusion (V/Q) scanning.

Authors+Show Affiliations

Department of Radiology, Duke University Medical Center, DUMC 3808, Durham, NC 27710, USA.No affiliation info availableNo affiliation info availableNo 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

16498123

Citation

Hurwitz, Lynne M., et al. "Radiation Dose to the Fetus From Body MDCT During Early Gestation." AJR. American Journal of Roentgenology, vol. 186, no. 3, 2006, pp. 871-6.
Hurwitz LM, Yoshizumi T, Reiman RE, et al. Radiation dose to the fetus from body MDCT during early gestation. AJR Am J Roentgenol. 2006;186(3):871-6.
Hurwitz, L. M., Yoshizumi, T., Reiman, R. E., Goodman, P. C., Paulson, E. K., Frush, D. P., Toncheva, G., Nguyen, G., & Barnes, L. (2006). Radiation dose to the fetus from body MDCT during early gestation. AJR. American Journal of Roentgenology, 186(3), 871-6.
Hurwitz LM, et al. Radiation Dose to the Fetus From Body MDCT During Early Gestation. AJR Am J Roentgenol. 2006;186(3):871-6. PubMed PMID: 16498123.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Radiation dose to the fetus from body MDCT during early gestation. AU - Hurwitz,Lynne M, AU - Yoshizumi,Terry, AU - Reiman,Robert E, AU - Goodman,Philip C, AU - Paulson,Erik K, AU - Frush,Donald P, AU - Toncheva,Greta, AU - Nguyen,Giao, AU - Barnes,Lottie, PY - 2006/2/25/pubmed PY - 2006/4/21/medline PY - 2006/2/25/entrez SP - 871 EP - 6 JF - AJR. American journal of roentgenology JO - AJR Am J Roentgenol VL - 186 IS - 3 N2 - OBJECTIVE: The purpose of our study was to determine radiation dose to the fetus at early gestation when contemporary MDCT scanners are used for common clinical indications. MATERIALS AND METHODS: Anthropomorphic phantoms were constructed to reflect a pregnant woman. Thermoluminescence dosimeters (TLDs) and metal oxide semiconductor field effect transistor (MOSFET) detectors were placed in appropriate locations to determine real-time radiation exposure to the fetus at 0 and 3 months' gestation. Imaging was performed on a 16-MDCT scanner using current institutional CT protocols: renal stone (140 kVp, 160 mA, rotation time of 0.5 sec, 16 x 0.625 mm), appendix (140 kVp, 340 mA, rotation time of 0.5 sec, 16 x 0.625 mm), and pulmonary embolus (140 kVp, 380 mA, rotation time of 0.8 sec, 16 x 1.25 mm). RESULTS: The radiation dose to the fetus at 0 and 3 months, respectively, was as follows: renal stone protocol, 0.8-1.2 and 0.4-0.7 cGy; appendix protocol, 1.52-1.68 and 2-4 cGy; and pulmonary embolus protocol, 0.024-0.047 and 0.061-0.066 cGy. CONCLUSION: Radiation doses to the fetus from institutional MDCT protocols that may be used during pregnancy (for pulmonary embolus, appendicitis, and renal colic) are below the level thought to induce neurologic detriment to the fetus. Imaging the mother for appendicitis theoretically may double the fetal risk for developing a childhood cancer. Radiation doses to the fetus from pulmonary embolus chest CT angiography are of the same magnitude as ventilation-perfusion (V/Q) scanning. SN - 0361-803X UR - https://www.unboundmedicine.com/medline/citation/16498123/Radiation_dose_to_the_fetus_from_body_MDCT_during_early_gestation_ L2 - http://www.ajronline.org/doi/full/10.2214/AJR.04.1915 DB - PRIME DP - Unbound Medicine ER -