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Lying-on position of total skin electron therapy
1Department of Radiation Oncology, Kaohsiung Chang Gung Memorial Hospital, Taiwan.
International Journal of Radiation Oncology, Biology, Physics
|October 6, 1997
Summary
A new lying-down technique for Total Skin Electron Therapy (TSET) enables treatment for patients unable to stand. This method offers feasible and compatible whole-body electron therapy with good surface dose distribution.
Area of Science:
- Radiation Oncology
- Medical Physics
Background:
- Total Skin Electron Therapy (TSET) is crucial for widespread skin malignancies.
- Conventional TSET requires patients to be in a standing position, limiting accessibility for some individuals.
Purpose of the Study:
- To develop and evaluate a novel lying-down technique for whole-body electron therapy.
- To provide a feasible treatment option for patients with skin malignancies who cannot tolerate the standing position.
Main Methods:
- Utilized a Varian 2100C linear accelerator with a 6 MeV electron beam.
- Implemented two main procedures: static AP/PA vertical dual fields (VDF) and oblique junction fields (OJF).
- Employed acrylic boards and patient positioning adjustments to achieve optimal dose distribution and effective treatment profiles.
Main Results:
- Achieved effective treatment profiles of 188 x 72 cm (VDF) and 180 x 85 cm (OJF) at an 87% dose level.
- Measured superficial doses to the vertex and soles of the feet within the 80-88% range.
- Demonstrated the technical feasibility of the lying-down TSET technique.
Conclusions:
- The lying-down position for TSET is technically feasible and provides compatible dose distribution with the Stanford standing technique.
- This method offers a comfortable and reproducible treatment option for nonambulatory patients with skin malignancies.
- Expands accessibility to TSET for a broader patient population.