Multiple Respiration-Correlated Cone Beam Computed Tomography (CT) Scans to Reduce Target Positioning Errors in Radiotherapy Treatment of Thoracic Cancer
The purpose of this study is to use cone-beam CT scans to more accurately position the tumor during radiation and to see whether this method is more effective than the standard method of using 2D images (portal images), which is a type of X-ray. Cone-beam CT is a type of CT scanner attached to the treatment accelerator that produces 3D images of the patient.
The ability to eliminate the tumor with radiation depends in part on the accuracy of delivering the radiation to the lung. The position of the tumor changes because of normal breathing. Therefore, we want to improve the accuracy of the way the radiation is delivered to the tumor. With cone-beam CT scans taken before and during your treatment, we will be able to determine the location of the tumor with 3D images, measure how much the tumor moves as you breathe, and then position you so that the tumor will get the best delivery of radiation.
|Study Design:||Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Diagnostic
|Official Title:||The Use of Multiple Respiration-Correlated Cone Beam CT Scans to Reduce Target Positioning Errors in Radiotherapy Treatment of Thoracic Cancer.|
- To enhance the accuracy of treatment delivery by using a cone-beam CT guided patient positioning procedure, relative to the standard portal image guided procedure. [ Time Frame: conclusion of the study ]
- To determine the reduction in the proportion of patients with large target positioning errors using the cone-beam CT guided procedure. [ Time Frame: conclusion of the study ]
- To gather data on organ motion and setup errors in the thorax and how they vary over the treatment course, in order to develop efficient clinical correction strategies. [ Time Frame: conclusion of the study ]
|Study Start Date:||July 2008|
|Study Completion Date:||January 2013|
|Primary Completion Date:||January 2013 (Final data collection date for primary outcome measure)|
cone-beam CT based
Procedure: cone-beam CT
You will have the following CT scans along with the standard weekly portal images:Before treatment you will have a CT scan (a respiratory-correlated CT scan) at the time of the radiation planning, or simulation planning.During the first week of treatment - you will have 5 cone-beam CT scans at days 1 through 5 of your radiation treatment schedule.
Please refer to this study by its ClinicalTrials.gov identifier: NCT00722605
|United States, New York|
|Memorial Sloan Kettering Cancer Center|
|New York, New York, United States, 10065|
|Principal Investigator:||Andreas Rimner, MD||Memorial Sloan Kettering Cancer Center|