I do not concur that this is the best way forward.

For dose calculation along a central axis (CAX), we first replace the incident IMRT fluence by an azimuthally averaged fluence.

I thought how lucky it was I had started practising birth control during the day, because in my winey state that night I would never have bothered to perform the delicate and necessary operation.

(golf) the extreme end of the head of a club.