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ViewRa has filed a patent for systems, methods, and computer software related to radiotherapy. The patent describes techniques for gating using non-parallel imaging planes, determining accumulated dose to tissues during radiotherapy, and adjusting therapy based on accumulated doses. The patent also includes the generation and use of prognostic motion models and motion-adapted radiation treatment plans. The claim specifically focuses on a non-transitory, machine-readable medium storing instructions for acquiring real-time images, contouring anatomical structures, setting spatial limits, controlling a radiotherapy device, and gating off the radiotherapy beam when spatial limits are exceeded. GlobalData’s report on ViewRay gives a 360-degree view of the company including its patenting strategy. Buy the report here.

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According to GlobalData’s company profile on ViewRay, radiotherapy techniques was a key innovation area identified from patents. ViewRay's grant share as of June 2023 was 1%. Grant share is based on the ratio of number of grants to total number of patents.

Gating radiotherapy based on non-parallel imaging planes

Source: United States Patent and Trademark Office(USPTO). Credit: ViewRay Inc

A recently filed patent (Publication Number: US20230125842A1) describes a non-transitory, machine-readable medium that stores instructions for a programmable processor to perform various operations. These operations include acquiring real-time images of a patient from a magnetic resonance imaging (MRI) system in at least two non-parallel planes, contouring an anatomical structure of the patient in these planes, setting spatial limits for movement of the anatomical structure, controlling a radiotherapy device to deliver a radiotherapy beam to the patient, and gating off the radiotherapy beam when the anatomical structure exceeds a spatial limit in either of the planes.

The patent also mentions that the non-parallel planes can be three orthogonal planes, orthogonal planes, or oblique planes. The acquisition of real-time images from the MRI system in these planes can be performed by energizing and controlling subsystems of a gradient coil system of the MRI system. Additionally, the contouring of the anatomical structure can be done through machine autocontouring or by receiving manual user input.

Furthermore, the patent states that the radiotherapy device can be controlled to deliver stereotactic radiosurgery (SRS) to the patient. The MRI system used in this invention operates at a field strength of less than 1.0 Tesla. Lastly, the spatial limits for the anatomical structure are set within 0.5 mm of the boundaries in the non-parallel planes.

This patent presents a novel approach to radiotherapy treatment by integrating real-time imaging from an MRI system with the delivery of radiotherapy. By acquiring images in multiple non-parallel planes and contouring the anatomical structure, the system can accurately set spatial limits for movement and ensure precise delivery of the radiotherapy beam. The ability to gate off the beam when the anatomical structure exceeds these limits enhances patient safety and treatment efficacy.

The patent also highlights the flexibility of the system, allowing for different types of non-parallel planes and different methods of contouring. The use of a lower field strength MRI system and the option for delivering SRS further demonstrate the versatility of this invention.

Overall, this patent introduces a promising technology that has the potential to improve the precision and effectiveness of radiotherapy treatments. The integration of real-time imaging and radiotherapy delivery can enhance patient outcomes and safety in the field of oncology.

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GlobalData, the leading provider of industry intelligence, provided the underlying data, research, and analysis used to produce this article.

GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies