BASIC STUDY OF RADIOTHERAPY TREATMENT PLANNING SYSTEM USING CT IMAGE

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  • CT画像を応用した放射線治療計画の基礎的研究
  • CT ガゾウ オ オウヨウシタ ホウシャセン チリョウ ケイカク ノ キソテキ

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Abstract

Currently, CT images are being used, namely for disclosing internal body structures ; but its great potential for radiation therapy treatment planning needs further exploitation. A new program based on three dimensional display combined with the isodose curve superimposed is presented. A VARIAN V-360 was used as the whole body CT scanner and an NEC THERAC-III system for radiotherapy treatment planning. The new soft-ware provided prommissing applicability since : 1. On the two-dimension image obtained from HARD-COPY image, relevant display of isodose curve along with the irradiation field, filter used, that is, filter wedge number, direction, and presence or absence of block was supplied. 2. Better image was made available by the three dimensional display of the trunk contour. 3. Higher accuracy for radiation therapy as a three dimension isodose curve was provided. 4. Greater facilities contributed by the various optional section cut displayed along with the isodose cuve.

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