Frequency of Portal Images Required to Enhance Quality Assurance for Breast Cancer Patients Treated With Radiotherapy

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00123812
Recruitment Status : Withdrawn
First Posted : July 26, 2005
Last Update Posted : February 24, 2016
Cross Cancer Institute
Information provided by (Responsible Party):
AHS Cancer Control Alberta

Brief Summary:

Currently in Canada, and at the Cross Cancer Institute, the treatment of many women with breast cancer involves radiotherapy (RT). There is a complex process which takes place in order to plan the radiation therapy before patients commence their treatment. In many circumstances the investigators use computerized technology to assist in planning their treatment. This allows more precision in delivering the treatment to the desired areas and avoiding areas of normal tissue.

Once the planning process is completed, the investigators then place marks with a marker pen on the skin of the patient to outline the area where the radiation will be delivered. The investigators confirm that the correct area is being treated with an x-ray taken on the treatment unit while the patient is in the treatment position. This is called a port film or verification film. The investigators then compare this to what they set up with the computerized data. If all the information matches, the patient is then treated for the full course of radiation, with the assumption that all treatments are given in the correct position. No further routine checking is done.

The standard at some radiotherapy centers is that the patient treatment position is verified weekly by a portal film. At the Cross Cancer Institute the investigators normally only do it once at the beginning of treatment.

No information is available to confirm the necessity of doing more frequent verification films, but in view of the very complex nature of the investigators' treatment delivery, it may be necessary to confirm the accuracy of their treatment more often.

Over the course of a 4-5 week treatment the investigators know that some patients may lose weight, some become more relaxed after a few days, and some have trouble with the movement in their shoulders; all of these factors influence the positioning of the patient. Measurements taken on the treatment unit often change during the course of a patient's treatment, but no further verification is performed to ensure that the treated area is still what was initially intended. It is important from a quality assurance standpoint to see if more frequent checking of the radiation treatment set-up is indicated.

Condition or disease
Breast Cancer

  Show Detailed Description

Study Type : Observational
Actual Enrollment : 0 participants
Official Title: Frequency of Portal Images Required to Enhance Quality Assurance for Breast Cancer Patients Treated With Radiotherapy
Study Start Date : March 2004
Study Completion Date : July 2006

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Breast Cancer

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Sampling Method:   Non-Probability Sample
Study Population
primary care clinic

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00123812

Sponsors and Collaborators
AHS Cancer Control Alberta
Cross Cancer Institute
Principal Investigator: Susan Chafe, MD Cross Cancer Institute

Responsible Party: AHS Cancer Control Alberta Identifier: NCT00123812     History of Changes
Other Study ID Numbers: BR-01-0056
First Posted: July 26, 2005    Key Record Dates
Last Update Posted: February 24, 2016
Last Verified: December 2011

Keywords provided by AHS Cancer Control Alberta:
quality assurance
frequency of port films

Additional relevant MeSH terms:
Breast Neoplasms
Neoplasms by Site
Breast Diseases
Skin Diseases