There is a bit of a naming issue here.
Whole Pelvis radiation means something different to urology/oncology than it does to radiography.
The urology/oncology meaning is usually prostate, seminal vesicles, and pelvic lymph nodes (or prostate bed instead of prostate and seminal vesicles in this case I guess).
The radiography meaning is a palliative treatment to the pelvic bone at a much lower dose. I don't think this is the intended meaning here but just beware in case you're searching on Google.
I had prostate, seminal vesicles, and pelvic lymph nodes zapped with external beam radiotherapy as my primary treatment. Prostate and seminal vesicles were done to 46G, and I'm not sure about pelvic lymph node dose, but if it was the same, that would almost match the 45Gy that paper suggests. (My prostate alone was then boosted to 61Gy with HDR Brachy.)
I'm not aware of any side effects from the radiation to my pelvic lymph nodes (I'm almost 3 years past treatment now). I recall raising this as a concern beforehand (things like lymphodema), and I think the oncologist said he'd never had any patients with side effects from this reduced radiation dose to lymph nodes. I'm just not completely sure what the planned dose for my pelvic lymph nodes was.