Flipping Book - ATP

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Cone-Beam Computed Tomography
Features
 soft-tissue contrast
 patient imaged in treatment
position
 3-D isotropic spatial resolution
 geometrically precise
 calibrated to linac iso-centre
 The potential to return to the
planning system for treatment
dose reconstruction/evaluation
Limitations
 NOT fast acquisition
 0.5 - 2 minutes
 NOT diagnostic quality
 Truncation artifacts
 Image lag/ghosting
 No Scatter Rejection