Accuray Inc is a radiation oncology company that develops solutions for radiation therapy. Its key products are the CyberKnife and TomoTherapy systems, which deliver treatments such as stereotactic radiosurgery, stereotactic body radiation therapy, intensity modulated radiation therapy, image-guided radiation therapy, and adaptive radiation therapy. The CyberKnife systems are fully robotic and can automatically track tumor and patient movements during the procedure, which allows for a precise delivery of radiation. The TomoTherapy systems are used for image-guided IMRT and can deliver radiation from 360 degree around the patient or from direct beam angles. Sales in the United States contribute the largest proportion of the firm’s revenue.