Simultaneous Cone Beam Computed Tomography (CBCT) Acquisition During Arc Radiotherapy
Trial Snapshot
- Phase
- Not Applicable
- Sponsor
- Sally Falk
- Enrollment
- 75
- Locations
- 2
- Primary Endpoint
- Equivalence of image quality
Study Overview
Brief Summary
The cone beam image is a part of the radiotherapy treatment machine and uses lower energy xrays as the head of the radiotherapy machine moves around the patient in a circle. This takes pictures that give 3-dimensional information, somewhat like a CT scan. These images are better at showing the position of the tumour and surrounding soft tissues than the standard xrays that were previously used. Cone Beam Imaging Technology is not new and has been used regularly at The Christie for many years. The standard cone beam scan is taken before the actual radiotherapy treatment or after the treatment has been delivered.
Volumetric Modulated Arc Therapy (VMAT or Arc Radiotherapy) is a novel method of delivering radiotherapy that involves the continuous movement of the radiotherapy treatment machine head around the patient and MLC during radiation. Arc radiotherapy has been clinically implemented at The Christie for prostate radiotherapy treatments and work is in progress for implementation in lung radiotherapy. The continuous gantry rotation inherent to VMAT delivery makes this simultaneous imaging possible, although there are concerns associated with the impact that this may have on patient dose and image quality.
The aim of this research is to assess whether the image quality of cone beam scans taken during treatment are as good as standard cone beam scans taken before or after treatment used to determine the accuracy of patient position and the tumour coverage by radiotherapy.
Study Design
- Study Type
- Interventional
- Allocation
- Na
- Intervention Model
- Single Group
- Masking
- None
Eligibility Criteria
- Ages
- 18 Years to — (Adult, Older Adult)
- Sex
- All
- Accepts Healthy Volunteers
- No
Inclusion Criteria
- Not provided
Exclusion Criteria
- Not provided
Outcomes
Primary Outcomes
Equivalence of image quality
Time Frame: 12 months
To show equivalence of image quality from simultaneous CBCT acquisition during delivery of arc radiotherapy with that obtained from conventional CBCT acquisition in lung and prostate patients, as assessed by user-questionnaires.
Secondary Outcomes
- Quantify impact on treatment times.(12 months)
- Quantify inter-observer variation(12 months)
Investigators
Sally Falk
Clinical Trial Project Manager
The Christie NHS Foundation Trust
