What is your bladder constraint for LDR prostate brachy?

There are typically no bladder constraints with LDR planning. The bladder itself should generally not be in the PTV.

The urethra does have important planning objectives/constraints, which depend on isotope and technique used. ABS guidelines are a good place to start.

Some people do have loose constr...

We try to limit bladder neck area covered by 80-85% IDL instead of 100%.

Smith et al., PMID 20888139