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Publication Number
US-12682456-B2
Publication Date
2026-07-14
Expiration Date
Abstract
A computer-implemented image evaluation method for a radiotherapy device, a radiotherapy device and a computer-readable medium are provided. The computer-implemented image-evaluation method comprises obtaining a time series of images of a subject disposed in the radiotherapy device. The computer-implemented image-evaluation method further comprises determining a quality factor for an image of the time series of images. The computer-implemented image-evaluation method further comprises, in response to determining that the quality factor does not meet a condition, generating a computer-executable instruction for adjusting operation of the radiotherapy device.
Core Innovation
The invention evaluates a time series of two-dimensional MR images or two-dimensional kV images of a subject in a radiotherapy device. It determines an image quality factor from image and tracking metrics, which may include anatomical deformation, through-plane motion, tracking jitter, motion presence, registration-score stability, and image intensity or contrast change. When the factor does not meet a condition, the system generates an instruction to adjust device operation.
The supplied partial content does not include the patent's background section, so the problem identified there is not explicitly described in patent. The claim set addresses image evaluation and device adjustment when image quality fails a condition, where disclosed responses include stopping or preventing radiation-beam delivery. Metrics may be aggregated and selected according to treatment type, and quality can be assessed across consecutive images.
Claims Coverage
The claim coverage includes three inventive features corresponding to independent claims for a computer-implemented method, a radiotherapy device, and a non-transitory computer-readable medium.
Image evaluation method
The method obtains a time series of two-dimensional MR images or two-dimensional kV images of a subject in a radiotherapy device, determines a quality factor for an image, and generates a computer-executable instruction for adjusting device operation if the quality factor does not meet a condition.
Radiotherapy device with image evaluation
The radiotherapy device comprises a radiation source, an imaging apparatus, and a controller. The controller obtains the specified image time series, determines an image quality factor, and generates an instruction to adjust device operation when the factor does not meet a condition.
Computer-readable medium storing image evaluation instructions
The non-transitory computer-readable medium stores instructions that cause a processor to obtain the specified image time series, determine an image quality factor, and generate an instruction to adjust radiotherapy device operation when the factor does not meet a condition.
The independent claims cover image-quality evaluation and a resulting device-adjustment instruction across method, device, and computer-readable-medium embodiments.
Stated Advantages
Not explicitly described in patent.
Documented Applications
Image-quality evaluation for radiotherapy motion monitoring using two-dimensional MR or kV images of a subject in a radiotherapy device.
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