You may be concerned with RT but the procedure is simple and well tolerated. However, your nerve spare approach of 2008 may lose its purposes. The dosage and equipment will rule the outcome of success in both, cure and minimized side effects. Just as Alf says above you have chosen the best, a Rapidarc machine.
Every case is different but giving you an example; I had SRT (Variant-3D IMRT) four years ago for the whole pelvis and prostate fossa, in a total dosage of 68Gy in 37 fractions (every day except Sundays). The daily sections were easy to take and become a kind of a routine. One hour in advance I would drink lots of water to fill the bladder (it helps in minimizing the side effects), then I would drive to the clinic (50km far from my house). There, I would dress a light gown and lay face up on the machine’s stretcher while the beam head would move around me stopping here and there. All actions and movements were controlled by the staff in their computer screens live, in a separate room. It would take approximately 15 to 20 minutes (1 to 3 minutes under radiation). I never felt fatigue (played golf on weekends) or nausea. I had a sensation of burning pain on my fifths’ week of treatment when urinating and the stool became much liquefied with traces of blood (proctitis), although no skin burning marks. These side effects were treated with separate medicines during the three month post treatment, but apart from the partial loss of rectum sensation at discharge (stool is now more consistent), all physical symptoms have gone and I never experienced incontinence.
With newer equipment doctors plan for higher Gy dosages which can assure better results of success.
Wishing you the best
Age: 50 at Dx on May/2000; PSA=22.4;
6x cores biopsy positive; Gleason score (2+3=5)
RP in Aug/2000, PSA=24.2
Negative S-vesicles & lymph node (9); capsular penetration
Voluminous Adenocarcinoma, well-differentiated, Gs (3+2=5); pT3apN0
Post-op lowest PSA=0.18 on Oct/2000; Classified as Micro Metastasis
Jan/2001 PSA=0.26 Biochemical recurrence
AS (Watchful W.) until PSA=3.80 on Oct/2006; MRI & Bone scan negative
Nov/2006 SRT (3D IMRT; 68Gy / 37 fractions)
Feb/2008 lowest nPSA=0.05
May/2009 PSA=0.26 Biochemical recurrence
Oct/2010 PSA=0.95 (doubling at 9.6 months)
Nov/2010 ADT Cyproterone 100mg/day + Eligard 45mg 6-month depot
Asymptomatic, never incontinent, ED since RP