In early February, Fred Hutch began treating patients with ocular melanoma who've been recommended for proton therapy with a sophisticated new technique known as “pencil beam scanning” or PBS. Medical ...

Measurement set-up showing the 2D array ion chamber detector on top of the motion platform. (Courtesy: Eunsin Lee) Intensity-modulated proton therapy (IMPT) delivered via proton pencil-beam scanning ...

Dose distributions for (left) an uncollimated plan and (centre) a plan with apertures for proton therapy of an optic glioma; the right panel shows the dose differences. The use of apertures reduces ...

A new system represents the first time that the capabilities of conventional beam-scanning lidar systems have been combined with those of a newer 3D approach known as flash lidar. The nonmechanical 3D ...