A LIGHT ANALOG SYSTEM FOR RADIOTHERAPY PLANNING

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Abstract
A simplified radiotherapy planning system is proposed which is based on the conversion of the conventional isodose curves into film transparencies. These film analogs can be superimposed to visually portray radiation field interactions. More complicated solutions can be solved on a proposed light isodensity planner. This system will permit the solution of simple coplanar fields, multiple fields (including wedged and nonwedged fields), partial rotation or complete rotation or any combination of the above. It can be operated without special training and utilizes equipment usually found in a radiotherapy department. It is of special help to smaller therapy departments and private practices with limited personnel to document their planning. It will be very helpful in teaching centers where radiology residents, physicists and radiotherapy planners will find it a useful teaching aid.

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