An on-line computer graphics terminal for radiotherapy treatment planning

Area of Science:

• Medical Physics
• Radiotherapy
• Computer Science

Background:

• Traditional radiotherapy treatment planning relies on dedicated systems or batch processing, which can be time-consuming and less interactive.
• There is a need for more accessible and efficient methods for calculating dose distributions in radiotherapy.

Purpose of the Study:

• To introduce and evaluate a novel programmed graphics terminal system for on-line radiotherapy dose distribution calculations.
• To demonstrate the system's viability as an alternative to dedicated systems and batch working.

Main Methods:

• Connecting a programmed graphics terminal, based on a mini-computer, to a large time-shared computer.
• Utilizing interactive data input, a large-screen refresh oscilloscope for visualization, and an X-Y plotter for hard-copy output.
• Running radiotherapy dose computation programs in standard Fortran on the remote host computer with graphical interaction.

Main Results:

• The system accurately calculates dose distributions for external beam radiotherapy, including off-axis planes.
• Interactive data input is user-friendly, and dose distributions are displayed as isodose contours.
• The system demonstrated advantages in accuracy, speed, ease of use, maintenance, and program transferability.

Conclusions:

• The on-line programmed graphics terminal is a viable and effective tool for radiotherapy treatment planning.
• This system offers significant improvements in efficiency and accessibility compared to conventional methods.
• The technology facilitates accurate and interactive dose distribution calculations, enhancing radiotherapy planning.