This Month's Profile Group, Start-Ups Reduce Radiation Exposure, features profiles of ControlRad Systems, Nanovi, and SoniTrack Systems. Plus these Start-Ups Across Health Care: Mardil Medical, MedLumics, Mnemosyne Pharmaceuticals, and OxSonics.

One shortcoming of many cancer drugs is their limited ability to reach deep into solid tumors. OxSonics Ltd. hopes to improve on this with SonoTran, an ultrasound device that activates sono-sensitive nanoparticles to push drug molecules deeper into tumors.