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Nodal CTV
Ultrasmall Particles of Iron Oxide (USPIO) data
Taylor A, Rockal AG, Reznek RH et al. Mapping pelvic lymph nodes: guidelines for delineation in intensity-
modulated radiotherapy. Int. J. Radiation Oncology Biol. Phys., Vol 63.no.5, 1604-1612, 2005.
•
20 patients, gynae cancer
•
USPIO administered
•
All nodes outlined
–
61 nodes / patient
–
1 to 12 mm short axis
•
Muscle and bone excluded
Taylor A et al., IJROBP 2005
3D margin around vessels (mm
)
3
5
7
10
15
Nodal coverage
56 %
76 %
88 %
94 % 99 %
Bowel V in PTV
-
-
147 cm
3
190 cm
3
266 cm
3
7 mm margin with minor adjustments: 99 % coverage of lymph nodes