Chu J C, Coia L R, Aziz D, Stafford P M
Department of Medical Physics, Rush-Presbyterian-St. Luke's Medical Center, Chicago, IL 60612.
Radiother Oncol. 1991 Aug;21(4):257-60. doi: 10.1016/0167-8140(91)90050-q.
The superficial neck nodes in only 1 out of 7 patients with head and neck cancer studied received more than 90% of the prescribed dose when treated with opposed 6 MV photons. Beam spoilers placed upstream from the patient enhanced the dose to the superficial node at the expense of higher dose to the skin.