Breast dose during electron-beam CT

Measurement with film dosimetry

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

PURPOSE: To measure the breast dose and dose distribution from examinations performed with electron-beam computed tomography (CT). MATERIALS AND METHODS: Radiographic film was placed bilaterally at three depths in the breasts of an anthropomorphic phantom and exposed with clinically relevant protocols. The average breast dose and the dose distribution were obtained from the digitized and calibrated film and compared with those obtained with conventional CT. RESULTS: Breast doses from electron-beam CT chest, coronary artery calcium, and cardiac function examinations were 21.9, 2.87, and 1.55 mGy, respectively. Within the breast, the dose decreased linearly by a factor of three from the axilla to the sternum. The breast dose from a conventional CT chest examination ranged from 18 to 33 mGy and did not vary substantially across the breast. CONCLUSION: For chest examinations, the average breast dose from an electron-beam CT scanner was comparable to that from conventional CT scanners, despite the differences in dose distribution.

Original languageEnglish (US)
Pages (from-to)153-157
Number of pages5
JournalRadiology
Volume196
Issue number1
StatePublished - 1995

Fingerprint

Film Dosimetry
X Ray Computed Tomography
Breast
Thorax
Tomography
X-Ray Computed Tomography Scanners
Sternum
X-Ray Film
Axilla
Coronary Vessels
Calcium

Keywords

  • Computed tomography (CT), electron beam
  • Computed tomography (CT), radiation exposure
  • Dosimetry

ASJC Scopus subject areas

  • Radiological and Ultrasound Technology

Cite this

Breast dose during electron-beam CT : Measurement with film dosimetry. / McCollough, Cynthia H; Liu, H. H.

In: Radiology, Vol. 196, No. 1, 1995, p. 153-157.

Research output: Contribution to journalArticle

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AB - PURPOSE: To measure the breast dose and dose distribution from examinations performed with electron-beam computed tomography (CT). MATERIALS AND METHODS: Radiographic film was placed bilaterally at three depths in the breasts of an anthropomorphic phantom and exposed with clinically relevant protocols. The average breast dose and the dose distribution were obtained from the digitized and calibrated film and compared with those obtained with conventional CT. RESULTS: Breast doses from electron-beam CT chest, coronary artery calcium, and cardiac function examinations were 21.9, 2.87, and 1.55 mGy, respectively. Within the breast, the dose decreased linearly by a factor of three from the axilla to the sternum. The breast dose from a conventional CT chest examination ranged from 18 to 33 mGy and did not vary substantially across the breast. CONCLUSION: For chest examinations, the average breast dose from an electron-beam CT scanner was comparable to that from conventional CT scanners, despite the differences in dose distribution.

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