Cone beam CT doses in radiotherapy patient positioning in Finland-prostate treatments.
Teemu SiiskonenSaara AleniusTiina SeppäläJoonas TikkanenMiia NadhumJarkko OjalaPublished in: Radiation protection dosimetry (2024)
Imaging parameters, frequencies and resulting patient organ doses in treatments of prostate cancer were assessed in Finnish radiotherapy centres. Based on a questionnaire to the clinics, Monte Carlo method was used to estimate organ doses in International Commission on Radiological Protection standard phantom for prostate, bladder, rectum and femoral head. The results show that doses from cone beam computed tomography imaging have reduced compared to earlier studies and are between 3.6 and 34.5 mGy per image for the above-mentioned organs and for normal sized patients. There still is room for further optimization of the patient exposure, as many centres use the default imaging parameters, and the length of the imaged region may not be optimal for the purpose.
Keyphrases
- prostate cancer
- high resolution
- case report
- monte carlo
- early stage
- radical prostatectomy
- end stage renal disease
- ejection fraction
- cone beam
- primary care
- spinal cord injury
- newly diagnosed
- locally advanced
- computed tomography
- image quality
- magnetic resonance imaging
- peritoneal dialysis
- benign prostatic hyperplasia
- magnetic resonance
- functional connectivity
- dual energy
- rectal cancer
- fluorescence imaging
- patient reported outcomes
- pet ct
- mass spectrometry
- psychometric properties
- case control