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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