Molecular Imaging 2017

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Systematic Approach

Nodal Assessment

Involvement based on:  Size (short axis)  Mesorectal ≥5mm:

Sens 81%, Spec 68% (vs 3% & 100% for ≥10mm)

 Internal iliac: ≥8mm  Other nodes ≥10mm

 Morphology:

 Mixed signal characteristics  Irregular border Sensitivity 85%, Specificity 97%*

*Brown et al. Radiology 2003;227:371-377