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Related Experiment Videos

Radiation dose reduction for augmentation mammography.

Ralph L Smathers1, John M Boone, Lisa J Lee

  • 1Mammography Specialists Medical Group, Inc., 14651 S Bascom Ave., Suite 210, Los Gatos, CA 95032, USA. rs@mammo.net

AJR. American Journal of Roentgenology
|April 24, 2007
PubMed
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Mammograms for augmented breasts deliver higher radiation doses. Utilizing faster screen-film and rhodium-rhodium combinations can significantly reduce this dose, making screening safer for patients.

Area of Science:

  • Radiology
  • Medical Imaging
  • Radiation Oncology

Background:

  • Patients with cosmetic breast augmentation have larger, denser breasts.
  • Augmented breasts receive higher radiation doses during mammography compared to non-augmented breasts.

Purpose of the Study:

  • To evaluate the increase in radiation dose for augmented breasts during mammography.
  • To identify and assess techniques for reducing radiation dose in mammography for augmented patients.

Main Methods:

  • Measured mean glandular dose (MGD) in 206 women with breast implants undergoing screening mammography.
  • Calculated MGD for 1,632 images, recording effective tube current, peak kilovoltage, and breast thickness.
  • Evaluated two screen-film and three target-filter combinations for dose reduction.

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Main Results:

  • Using a 190-speed screen-film combination reduced MGD by 35% (10.7 to 7.0 mGy).
  • Switching to a rhodium-rhodium (Rh-Rh) target-filter combination reduced MGD by 24%.
  • A combined approach (190-speed screen-film and Rh-Rh filter) reduced MGD by 50% for implant-full views.

Conclusions:

  • Standard four-view augmentation mammography yields 10.7 mGy MGD, 3.1 times higher than conventional mammography.
  • This elevated dose increases lifetime risk of radiation-induced breast cancer significantly.
  • Recommended dose reduction strategies (faster screens, Rh-Rh filters, fewer views) can lower MGD to 3.6 mGy, below the 7.0 mGy threshold.