What are the dosimetry options available for brachytherapy sources in Australia?
When to inject brachytherapy spacer material?
- The spacer material is usually injected before beginning EBRT or after completion of brachytherapy implant. Higher risk patients have better biochemical survival outcomes if they are treated with combined modalities of external beam radiation therapy and brachytherapy .
How does hydrogel distribution affect brachytherapy dosimetry?
- Asymmetry in hydrogel distribution was found to adversely affect rectal dosimetry in prostate IMRT, and it is expected that displacement of the relatively flat posterior border of the prostate to the one that may be tilted superiorly or inferiorly and/or left vs. right, would adversely affect brachytherapy dosimetry [9, 10].
Do brachytherapy well chambers need to be calibrated?
- Well chambers used to characterise brachytherapy seeds need to be calibrated for the seed type (manufacturer and model). The same recommendations apply for getting a well chamber calibrated overseas as for Iridium-192.
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