802 / 1674
sources are far from target volume
4 - 5 channels – more dwell positions
sphere-like target volume and dose
distribution
no geometric miss – tissue conformance
is not always guaranteed (air gaps)
limited asymmetric margin
relatively homogeneous dose distribution
small dose gradient at target edge
modest dose modulation potential
Intracavitary BT (ML MammoSite – Contura)
Kim et al. J Appl Clin Med Phys 15(1):4429. 2014