Abstract
Ten ionization chambers (PTW), partly of different type, which all have been calibrated in terms of absorbed dose to water, were used to compare the absorbed dose indicated in a reference geometry at 8 MVX-rays. The standard deviation of the mean value of the absorbed dose determined for al chambers was 0.5%. Since 4 chambers have been calibrated in terms of absorbed dose to water and in exposure, the absorbed dose to water was determined from indicated value according to both calibration procedures. The dose values obtained via the energy dose calibration turned out to be about 2.5% less compared to result when applying the exposure calibration factor.
| Translated title of the contribution | Absorbed dose and exposure calibration of ionization chambers - A comparison at high photon energy |
|---|---|
| Original language | German |
| Pages (from-to) | 297-300 |
| Number of pages | 4 |
| Journal | Strahlentherapie und Onkologie |
| Volume | 166 |
| Issue number | 4 |
| State | Published - 1990 |
| Externally published | Yes |