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[en] With HDR (high dose rate) afterloading treatment, a very critical dependence of normal tissue reaction (rate of side effects of organs at risk) on dosage was demonstrated compared with the effect of low dose rate application. Furthermore, a stronger dependence of normal tissue reaction (steeper curves) on application of a single HDR afterloading fraction compared with that on total dose application over several weeks was observed. All these observations require exact dosage of HDR afterloading application to all points of organs at risk concerned in order to compensate the radiobiologically critical dosage of HDR. On the other hand, a threshold of 7 to 7.5 Gy per single fraction at organs at risk should not be exceeded. Therefore, HDR afterloading treatment requires optimization of source arrangement or source movement in order to receive good results. Since 1976, computer optimization of the movement of a highly active Ir-192 source is used, since 1987, an IBM PC AT is used for this calculation. The computer optimization programme, its data output and isodose calculation parts, is briefly discussed. 3 refs.; 5 figs

[en] A package of IBM-PC computer programs is presented which improves accuracy in the planning and application of radiotherapy. (author)

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[en] The main features of JAERI-Conversion are briefly given. The adaptation of cycle 1 and the updating procedure, as also errors detected during updating are then presented

[en] A collection of programs written in FORTRAN and ASSEMBLER programming languages used in DOS-IBM is presented. The problems solved are of different sorts: linear programming, integration, matrix calculus, computation of absorbed doses in teletherapy, data sets (files) on magnetic tapes and disks, completion of DOS operating system etc. For reasons of space no details are given on the numerical methods or supplements and devices developed in order to achieve superior programs as to computation time and accuracy of result, although these might have been of use. All the programs in the collection have been checked up on an IBM 370/135 computer. (author)

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[en] This document is intended to introduce the computational facilities available in the fields of atomic, molecular the solid state theory on the IBM370/165 at Harwell. The programs have all been implemented and thoroughly tested by the Theory of Solid State Materials Group. (author)