Fig. 5.

(a) Handheld probe for scanning the head/neck tumor. (b) Average tumor rBF changes during radiotherapy averaged over seven patients who were complete responders to radiation treatment. (c) Average tumor blood oxygen saturation (${\mathrm{StO}}_2$). (d) Average tumor THC. (e) rBF observed from a partial responder. (f) ${\mathrm{StO}}_2$ from a partial responder (g) THC from a partial responder. Courtesy of U. Sunar.²⁹