bastula.org: 4th gear

Alex typically doesn’t do the IMRT QA at Silver Cross. Instead, he only does chart checks and mechanical QA. I went with him this morning and we checked the outputs for all the photon and electron energies. We also did an energy check, which basically is determining whether the beam will produce a reading at a certain depth different than dMax.

We tweaked some of the beams a little bit, because there was a rising trend over the last few weeks (also noted by the therapists). After this, Alex finished checking his charts and I did a couch isocentricity test and verified the isocenter of the machine by using the front pointer and a pen. We both finished the day by resetting the lasers to an appropriate value using a piece of paper and a polystyrene block.