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Table 4 Mean sigma indices for the PTVs

From: The influence of MRI scan position on patients with oropharyngeal cancer undergoing radical radiotherapy

 

PTVC: PTVC*

PTVDPTVD†

PTVRT: PTVRT††

PTVC: PTVRT

PTVD: PTVRT

Mean sigma index (%)

3.0

3.1

3.3

7.3

9.1

  1. PTV left of the colon indicates the PTV for which the VMAT plan was optimized and right of the colon the PTV under examination.
  2. * PTV delineated using the CT with diagnostic MRI viewed separately.
  3. † PTV delineated on the CT registered with diagnostic MRI.
  4. †† PTV delineated on the CT registered with radiotherapy positioned MRI.
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Radiation Oncology

ISSN: 1748-717X

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