Advanced treatments such as IMRT and Stereotactic Radiosurgery demand accurate dose field QA. These fields contain very steep dose gradients (penumbra). Because dose gradients are meant to tightly conform to patient anatomy and tumor volume, accurate measurement of dose gradients and the treatment planning system are critical. MapCHECK is the proven worldwide leader in filmless IMRT QA. It is preferred due to the small size of its diode detectors (0.000019cm3), higher sensitivity (10 times that of ion chamber arrays), and superior detector stability. MapCHECK avoids the dose volume averaging problems seen with ion chambers and because IMRT beams are collections of small fields with steep dose gradients, this is a critical MapCHECK advantage. With over five years of clinical use, MapCHECK is designed to provide efficient and complete analysis tools such as structure import, MLC QA, and Beam QA.
Ideal for Rotational Dosimetry
Although no two dimensional array configuration is geometrically ideal for rotational dosimetry, independent testing shows that the MapCHECK performs strongly for this new QA challenge. Importantly, the diode based MapCHECK performed as well if not better for rotational modalities compared to ionization chamber arrays1.
Gated Delivery & Target Motion QA
The MotionSim XY/4D™ is a sophisticated hardware and software upgrade option for all MapCHECK users. MotionSim XY/4D works with the MapCHECK as the only treatment simulator that can reproduce actual target motion (projected to BEV motion for each beam) obtained from a 4D CT (or other methods). A programmable gating surrogate is included, which is compatible with both RPM and belt systems. MotionSim XY/4D completely simulates an in-motion target to assess the dose distribution to the target, for gated and non-gated deliveries. Treat the MapCHECK array while it is on the MotionSim XY/4D to see dose distributions accumulate in real time with the effects of the actual target motion.
