Rapidarc is a cancer treatment device produced with advanced technology. This device is capable of volumetric and density-adjusted rotational irradiation. Thanks to the density adjustment feature, it is possible to plan the treatment at the desired intensity and the desired dose, considering the tumor shape, extension, and relations with neighboring organs. The control of treatment accuracy is done with snapshots taken before each treatment. With this image-guided treatment, the tumor can be irradiated with high accuracy, while intact tissues can be protected with the same sensitivity. Rapidarc significantly shortens the patient’s treatment time in irradiation compared to other similar radiotherapy devices.