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Related Experiment Videos

Prone position breast irradiation

T E Merchant1, B McCormick

  • 1Department of Radiation Oncology, Memorial Sloan-Kettering Cancer Center, New York, NY 10021.

International Journal of Radiation Oncology, Biology, Physics
|August 30, 1994
PubMed
Summary
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A new prone position technique for breast irradiation after conserving surgery improves radiation dose distribution. This method reduces high-dose areas and spares normal tissues, benefiting women with larger or irregularly shaped breasts.

Area of Science:

  • Radiation Oncology
  • Breast Cancer Treatment
  • Medical Physics

Background:

  • Breast-conserving surgery (BCS) is a standard treatment for breast cancer.
  • Whole breast irradiation (WBI) is commonly delivered in the supine position.
  • The supine position can lead to suboptimal dose distribution and increased normal tissue irradiation.

Purpose of the Study:

  • To describe an alternative breast irradiation technique using the prone position.
  • To improve radiation dose distribution within the breast.
  • To reduce the volume of normal tissues irradiated during WBI.

Main Methods:

  • Utilized the prone position for breast irradiation.
  • Optimized breast shape to improve dosimetry.
  • Focused on reducing high-dose regions and isodose gradients at the breast base.

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Main Results:

  • Reduced high-dose regions at the breast base from 116-118% (supine) to 102-103% (prone) in large-breasted women.
  • Minimized irradiation of the heart, lungs, chest wall, and contralateral breast.
  • Demonstrated benefits for women with large, pendulous, or irregularly shaped breasts.

Conclusions:

  • The prone position technique offers improved dose homogeneity and normal tissue sparing.
  • It combines the reproducibility of the supine position with the benefits of the lateral decubitus position.
  • Prone breast irradiation is a simple, effective alternative for patients at risk of dose inhomogeneity or significant normal tissue doses.