Hello David and welcome. LDR Brachy is not as common as it used to be as it's not as profitable to the providers as other options. However, it a patient qualifies, it's an excellent treatment that will cure your cancer as well as other options. Arguably it's also the "easiest" option. After the planning session it's simply a one-treatment out patient procedure.
The main qualifications are a prostate contained cancer and a normal sized prostate. Here is a link to one of the best known LDR practitioners in the mainland USA: https://www.chicagoprostatecancer.com/
This will provide you with the basics.
I had LDR Brachy 13 years ago and you can read my story by copying and pasting the link in my signature. I've been cured for many, many years and have zero side effects except the normal reduction in ejaculate which almost all treatments yield.
Good luck to you.