Sophisticated treatment options such as Arc, Helical, IGRT, IMRT, and SRS demand equally sophisticated patient specific QA. Modern patient plans are often collections of small beamlets with very steep dose gradients. Since these dose gradients are to tightly conform to patient anatomy and PTV, accurate verification of the dose gradient is critical. Using the right technology is critical. Sun Nuclear offers a variety of sophisticated treatment options using our advanced diode detectors, which measure actual delivered dose without the misleading and often hidden effects of dose volume averaging as seen in ionization chambers.