Abstract
When brain tumours are loaded with iodinated contrast media (CM) and exposed to X-rays, the photoelectrons, Auger electrons and fluorescent X-rays from the iodine enhance the radiation dose absorbed by the tumour. A modified CT scanner, the CTX, can be used to localize the tumour and to deliver the dose enhancement therapy. Monte Carlo calculations are presented of the central-axis radiation depth dose in a brain containing a tumour loaded with an iodine concentration of 5 mg ml-1 and irradiated with the CTX operated at various kV settings. The dose enhancement factor (DEF) is also calculated for various field sizes and for 5 mg ml-1 of gadolinium in the tumour when the CTX is operated at 140 kV. The calculated values of the DEF are close to published experimental results.
Original language | English (US) |
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Article number | 010 |
Pages (from-to) | 439-443 |
Number of pages | 5 |
Journal | Physics in medicine and biology |
Volume | 37 |
Issue number | 2 |
DOIs | |
State | Published - 1992 |
ASJC Scopus subject areas
- Radiological and Ultrasound Technology
- Radiology Nuclear Medicine and imaging