Still, MRI technology does have some inherent physical limitations. It lacks electron density and bony detail information, and geometric distortions reduce the spatial accuracy of treatment plans and cause variance in dose calculation. However, researchers have developed a number of techniques to solve these problems. Assigning bulk electron densities to tissues and using atlas-reconstruction method have resulted in dosimetric calculations that often differ by less than 1% from CT-based calculations. Implementation can also be difficult because patients undergoing treatment planning MRI exams require special accommodations. To reduce errors from motion, immobilization devices are frequently employed to hold the patient still during the exam. The MRI scanner must be able to accommodate these bulky devices, often through flexible coils or open-bore designs. Though many MRI exam tables are concave—to improve patient comfort—flat-top exam tables are needed for simulation in order to ensure reliable patient set-up.
For more information you can visit here:
Motion graphics video animation company