eISSN: 2081-2841
ISSN: 1689-832X
Journal of Contemporary Brachytherapy
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1/2013
vol. 5
 
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abstract:

Original paper
Optimizing parametrial aperture design utilizing HDR brachytherapy isodose distribution

Katherine L. Chapman
,
Nitin Ohri
,
Timothy N. Showalter
,
Laura A. Doyle

J Contemp Brachytherapy 2013; 5, 1: 50-54
Online publish date: 2013/03/31
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Treatment of cervical cancer includes combination of external beam radiation therapy (EBRT) and brachytherapy (BRT). Traditionally, coronal images displaying dose distribution from a ring and tandem (R&T) implant aid in construction of parametrial boost fields. This research aimed to evaluate a method of shaping parametrial fields utilizing contours created from the high-dose-rate (HDR) BRT dose distribution.

Eleven patients receiving HDR-BRT via R&T were identified. The BRT and EBRT CT scans were sent to FocalSim (v4.62)® and fused based on bony anatomy. The contour of the HDR isodose line was transferred to the EBRT scan. The EBRT scan was sent to CMS-XIO (v4.62)® for planning. This process provides an automated, potentially more accurate method of matching the medial parametrial border to the HDR dose distribution. This allows for a 3D-view of dose from HDR-BRT for clinical decision-making, utilizes a paperless process and saves time over the traditional technique.
keywords:

brachytherapy, cervical cancer, combined modality

 
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