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G Riehl

Publications and source records attributed to G Riehl.

5 recordsLinked to original sources
PubMed1984

A new approach to overcome the inconveniences in electron dosimetry associated with the beam scanning technique in linacs.

The therapeutic advantages of scanned electron beams from medical linear accelerators are accompanied by difficulties in electron dosimetry. Owing to short-time dose inhomogeneities in the treatment field, implicit in the system, time-consuming point-by-point measurements of dose distributions are normally required. However, by triggering the measuring time synchronously with the slow scan frequency, the time necessary to record reliable dose distributions can be shortened considerably. The instrumentation for the computer-controlled dosimetry system developed for this task is described. The results of our measurements show that reproducibility in dose within +/- 1% is achievable in less than 6.3 s per point for scanned electron beams.

Electrons↗
PubMed1980

[First experience with the electron accelerator "Therac 20-Saturne" in clinical practice. 1st communication: technical data and dosimetry of photon radiation (author's transl)].

The fundamental principles of construction, the operational data, handling and safety devices of the first linear electron accelerator type Therac 20-Saturne (CGR MeV) installed in Germany are described. Relevant characteristics of the radiation field for therapy with 12 and 18-MV photons and also the dosimetric data are reported. Observance of the tolerances recommended by the IEC is guaranteed with this accelerator.

Mathematics↗