CT-Based Versus Conventional Simulation for Palliative Radiotherapy of Non-Small Cell Lung Cancer
Radiotherapy (RT) treatment to the chest is a standard way of trying to decrease symptoms like cough or shortness of breath. Before any RT can be delivered, it must be planned, either using conventional x-rays ("fluoroscopy") or using computer tomography ("CT") scanning. This study is being done because the investigators do not know which of these two common ways of RT planning is better for balancing both treating the cancer and decreasing side effects.
|Study Design:||Observational Model: Cohort
Time Perspective: Cross-Sectional
|Official Title:||Comparison of Two-versus Three-Dimensional Treatment Planning for Patients Receiving Chest Radiotherapy for Symptom Control|
|Study Start Date:||April 2009|
|Study Completion Date:||January 2011|
|Primary Completion Date:||January 2011 (Final data collection date for primary outcome measure)|
Procedure: CT- simulation scan
Patients who are receiving standard palliative radiotherapy planned under x-rays will also undergo 1 CT-simulation scan which they would otherwise not require. The planning x-rays and CT scan will then be compared dosimetrically
Standard RT planning will be performed under conventional simulation, followed by CT-simulation (for study purposes only). Retrospectively, 3D treatment fields will be designed using the CT-simulation data, and compared to the actual treatment fields planned using x-rays. Coverage of the tumour volume will be assessed, together with doses, field sizes and beam positions, to determine relative undercoverage of tumour and overcoverage of normal tissue between the two planning methods, if any.
|Cross Cancer Institute|
|Edmonton, Alberta, Canada, T6G 1Z2|
|Principal Investigator:||Dr. Alysa Fairchild, MD FRCPC||AHS Cancer Control Alberta|