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Stopper
positioned
on depth
marker
Two way
stopcock
valve with leur
lock
Anterior groove helps
in alignment
Gas-release double-ported ERB
Van Lin et al. IJROBP 67, 2007
Telangiectasias w/out and w/ ERB
Displaces the posterior/ superior rectum
Allows more room for error
Less reliance on bladder filling
…
Endo Rectal
Baloon
(Lee et al, PTCOG 2010) (C.Rossi et al, Estro 2011)