Skip to main content

Radiation doses from small-bowel follow-through and abdominopelvic MDCT in Crohn's disease.

Publication ,  Journal Article
Jaffe, TA; Gaca, AM; Delaney, S; Yoshizumi, TT; Toncheva, G; Nguyen, G; Frush, DP
Published in: AJR Am J Roentgenol
November 2007

OBJECTIVE: The purpose of our study was to compare organ and effective doses for small-bowel follow-through (SBFT) and abdominopelvic MDCT in adults with Crohn's disease, to retrospectively evaluate the number of radiographic examinations performed for Crohn's disease indications, and to identify those patients undergoing serial examinations to better delineate the use of radiology in the diagnosis and clinical management of Crohn's disease. MATERIALS AND METHODS: Using an anthropomorphic phantom and metal-oxide semiconductor field-effect transistor (MOSFET) dosimeters, specific organ doses were measured for 5 minutes of continuous fluoroscopy (kVp, 120; mA, 0.6) of each of the following: right lower quadrant, central abdomen, and pelvis. Effective doses were determined based on International Commission on Radiological Protection (ICRP) 60 weighting factors. Organ and effective doses were determined for abdominal and pelvic 16-MDCT: detector configuration, 16 x 0.625 mm; pitch, 1.75; 17.5 mm per rotation; rotation time, 0.5 second; 140 kVp; 340 mA. Electronic records were reviewed to determine the number of patients imaged for Crohn's disease indications and the number of studies per patient. RESULTS: The highest fluoroscopic organ doses were as follows: in the right lower quadrant, right kidney (0.78 cGy) and marrow (0.66 cGy); in the central abdomen, kidneys (1.5 and 1.6 cGy) and marrow (0.76 cGy); and in the pelvis, marrow (0.67-0.95 cGy). Effective doses for the right lower quadrant, central abdomen, and pelvis were 1.37, 2.02, and 3.83 mSv, respectively. For MDCT, the highest organ doses were to the liver (2.95-3.33 cGy). The effective dose for abdominopelvic MDCT was 16.1 mSv. Three hundred seventy-three patients underwent imaging for Crohn's disease. The average number of SBFT and CT examinations was 1.8 and 2.3, respectively. Thirty-four (9%) of 373 patients underwent more than five CT examinations and 11 (3%) had more than 10. CONCLUSION: Organ and effective doses are up to five times higher with MDCT than with SBFT. Crohn's disease is more frequently imaged with CT. For a subset of patients who undergo numerous CT examinations, efforts should be made to minimize the number of CT examinations, decrease the CT dose, or consider MR enterography.

Duke Scholars

Published In

AJR Am J Roentgenol

DOI

EISSN

1546-3141

Publication Date

November 2007

Volume

189

Issue

5

Start / End Page

1015 / 1022

Location

United States

Related Subject Headings

  • Tomography, X-Ray Computed
  • Risk Factors
  • Risk Assessment
  • Relative Biological Effectiveness
  • Radiometry
  • Radiography, Abdominal
  • Radiation Dosage
  • Phantoms, Imaging
  • Nuclear Medicine & Medical Imaging
  • Intestine, Small
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Jaffe, T. A., Gaca, A. M., Delaney, S., Yoshizumi, T. T., Toncheva, G., Nguyen, G., & Frush, D. P. (2007). Radiation doses from small-bowel follow-through and abdominopelvic MDCT in Crohn's disease. AJR Am J Roentgenol, 189(5), 1015–1022. https://doi.org/10.2214/AJR.07.2427
Jaffe, Tracy A., Ana Maria Gaca, Susan Delaney, Terry T. Yoshizumi, Greta Toncheva, Giao Nguyen, and Donald P. Frush. “Radiation doses from small-bowel follow-through and abdominopelvic MDCT in Crohn's disease.AJR Am J Roentgenol 189, no. 5 (November 2007): 1015–22. https://doi.org/10.2214/AJR.07.2427.
Jaffe TA, Gaca AM, Delaney S, Yoshizumi TT, Toncheva G, Nguyen G, et al. Radiation doses from small-bowel follow-through and abdominopelvic MDCT in Crohn's disease. AJR Am J Roentgenol. 2007 Nov;189(5):1015–22.
Jaffe, Tracy A., et al. “Radiation doses from small-bowel follow-through and abdominopelvic MDCT in Crohn's disease.AJR Am J Roentgenol, vol. 189, no. 5, Nov. 2007, pp. 1015–22. Pubmed, doi:10.2214/AJR.07.2427.
Jaffe TA, Gaca AM, Delaney S, Yoshizumi TT, Toncheva G, Nguyen G, Frush DP. Radiation doses from small-bowel follow-through and abdominopelvic MDCT in Crohn's disease. AJR Am J Roentgenol. 2007 Nov;189(5):1015–1022.

Published In

AJR Am J Roentgenol

DOI

EISSN

1546-3141

Publication Date

November 2007

Volume

189

Issue

5

Start / End Page

1015 / 1022

Location

United States

Related Subject Headings

  • Tomography, X-Ray Computed
  • Risk Factors
  • Risk Assessment
  • Relative Biological Effectiveness
  • Radiometry
  • Radiography, Abdominal
  • Radiation Dosage
  • Phantoms, Imaging
  • Nuclear Medicine & Medical Imaging
  • Intestine, Small