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Patient set-up:
- Prostate mis-match (day of volume study/day of implant).
Implant progression:
- Pubic-arch interference.
- Prostate movement (linear and rotational).
- Bleeding affect seeds and needles visualisation on U/S.
- Seeds jamming and operator error.
Prostate oedema:
- Change in prostate size during and after the implant (seeds
migration).