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Prostate markers

• Widely used, 3-4 inserted

trans-rectally or trans-

perineally

• Allows correction for prostate

organ motion using 2D

equipment available in all

centres

• Markers need to have high

specific gravity e.g. Au or Pt if

used with MV rather than kV

imaging

• Automated detection software

available

2D orthogonal images gives 3D position