Previous Page  400-401 / 1245 Next Page
Information
Show Menu
Previous Page 400-401 / 1245 Next Page
Page Background

Other image possibilities

MRI images?

MRI superior soft tissue contrast

Lower intraobserver variation

Smaller margins

Bulk density assignment?

Bone must be delineated on the scans

Doses not as accurate as could be

DRR’s difficult

Atlas-based electron density mapping method

MRI atlas built up from number of patients

Corresponding CT data sets

Patient MRI mapped to atlas, same vectors applied to CT Atlas

PseudoCT and planning CT dose differences 95%

<2%/2mm.

Full examination of uncertainties needed

How similar is anatomy of patients?

Dowling IJROBP 83 (2012). Prostate