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Evaluation of the Informational Content of Setup Verification Images for Patients Receiving Breast Radiation Therapy (Anterior EPI) (Anterior EPI)

This study has been completed.
Information provided by:
British Columbia Cancer Agency Identifier:
First received: November 28, 2008
Last updated: March 7, 2012
Last verified: March 2012
The purpose of this study is to determine if an alternative imaging protocol done at the time of radiotherapy treatments for patients with breast cancer can improve accuracy in patient set-up.

Condition Intervention
Breast Cancer
Radiation: Anterior electronic portal images (EPI)

Study Type: Interventional
Study Design: Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Diagnostic
Official Title: A Prospective Evaluation of the Informational Content of Setup Verification Images for Patients Receiving Breast Radiation Therapy Tangentially With or Without Supraclavicular Treatment

Resource links provided by NLM:

Further study details as provided by British Columbia Cancer Agency:

Primary Outcome Measures:
  • To measure the difference in accuracy of a breast imaging protocol that includes a large anterior EPI in detecting set-up errors outside of tolerance as compared to the current standard breast imaging protocols. [ Time Frame: Will be measured on days 1, 2 and 3 of radiation therapy and possibly day 4 if adjustments of the EPI where required. ]

Secondary Outcome Measures:
  • What effect does the addition of a larger anterior EPI have on detection of setup errors in the medial/lateral, anterior/posterior, or superior/inferior directions and at what frequency do these errors occur in clinical practice. [ Time Frame: Will be measured on days 1, 2 and 3 of radiation therapy and possibly day 4 if adjustments of the EPI where required. ]

Estimated Enrollment: 200
Study Start Date: August 2008
Study Completion Date: August 2011
Primary Completion Date: July 2011 (Final data collection date for primary outcome measure)
Intervention Details:
    Radiation: Anterior electronic portal images (EPI)
    EPI's are taken for the first three consecutive days of treatment to detect set-up errors.
Detailed Description:
Accurate patient positioning is critical in Radiation Therapy. Electronic imaging is used to compare a patient's actual treatment position, with that which was planned from an initial CT scan. Radiation Therapists compare planned and actual images using analysis software to determine if differences are within acceptable tolerances. At the VIC, we use 3 different breast imaging protocols depending on the patient set-up and treatment technique. Findings from our recent retrospective planning study show that our current electronic imaging protocols miss some clinically significant patient set-up errors, particularly in the medial/lateral direction, and that these errors can be better detected with the use of an anterior image. The purpose of this study is to test these findings prospectively in clinical practice, through the direct comparison of our current protocols with a proposed new protocol, which would include an anterior electronic portal image (EPI).

Ages Eligible for Study:   Child, Adult, Senior
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • All patients (male or female) receiving tangential breast/chest wall radiotherapy only, or three or four field breast/chest wall and nodal radiotherapy will be eligible.

Exclusion Criteria:

  • Those patients receiving partial breast treatment, those patients requiring an electron match field, those on another breast cancer radiotherapy trial, those who require radiotherapy using deep inspiration breath hold or multi-field intensity modulated radiotherapy, and all non-breast cancer patients will be excluded.
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Please refer to this study by its identifier: NCT00800189

Canada, British Columbia
BCCA - Vancouver Island Cancer Centre
Victoria, British Columbia, Canada, V8R 6V5
Sponsors and Collaborators
British Columbia Cancer Agency
Principal Investigator: Elaine Wai British Columbia Cancer Agency
  More Information

Responsible Party: Elaine Wai, BCCA Identifier: NCT00800189     History of Changes
Other Study ID Numbers: BCCA002
Study First Received: November 28, 2008
Last Updated: March 7, 2012 processed this record on May 25, 2017