5.5 Acquire and use patient image data for treatment planning. Estimate uncertainties involved and assess their impact.
- Gain an understanding of and report on the following:
- Patient treatment set up and positioning procedures
- The purpose, importance and dosimetric considerations of patient immobilisation in external beam therapy
- Accuracy and limitations of immobilization devices
- Patient data required for treatment planning
- Methods for acquisition of patient data, including:
- Manual methods
- Simulator
- CT/CT-Simulator
- MRI
- PET/CT-PET
- Magnitude and sources of uncertainties involved in the:
- Image data
- Contouring of target volumes and critical tissue structures of interest
- Treatment margins needed for contouring the target volumes and organs at risk for a variety of treatment sites
- Application of the ICRU concepts in contouring:
- Target volumes
- Normal organs at risk
- Treatment margins
- Transfer patient image data to RTPS for a variety of treatment sites using:
- Radiographs
- CT images
- MR images
- Fused CT, MRI, and PET images
- Perform image registration and contouring with these images, for the treatment targets and organs of interest.
- Use:
- Margins to compensate/accommodate inter-fraction and intrafraction treatment errors.
- Image reconstruction
- 2-D and 3-D display of contoured body and tissue structures
- Generation of digital reconstruction radiograph (DRR)
- Identification of planning contours reference points for dose assessment and treatment set up
- Provide supervision, support and advice on:
- patient immobilization and patient data acquisition procedures
- Acquisition and application of patient data for treatment planning
- Image transfer and registration
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