Elekta Unity is the world's first high-field magnetic resonance radiotherapy system. It adopts Philips NMR technology and integrates the most advanced radiotherapy accelerator, 1.5T high-field diagnostic magnetic resonance system and online adaptive radiotherapy flow software system in the same platform. Unity can accurately deliver radiotherapy doses to the target volume while acquiring excellent magnetic resonance (MR) images, which will allow clinicians to observe tumors during treatment and take adaptive treatment.