PATENT CLAIM ANALYSIS

Application Number: 15892126
Application Type: Utility
Filing Date: 2018-02
Publication Date: 2018-10
Patent Classification: ["250", "492300"]

Abstract:
The disclosed systems and methods for Image-Guided Radiation Therapy (IGRT), utilises an iterative approach which adjusts a treatment plan based on inter- or intra-fraction images to improve the accuracy of the radiation delivered during the overall treatment. The prescribed dose of radiotherapeutic radiation is mapped onto the patient's anatomy using an image acquired of the region, which is to be the target for radiotherapeutic radiation. Following beam-angle-optimisation, fluence optimisation and segmentation, the efficiency of delivery of each segment is determined using an objective function, and the segments ranked according to their efficiency. The plan proceeds with the choice of the most efficient segment (or segments) to be delivered first. When this radiation has been delivered, having been tracked to establish its distribution, this delivered distribution can be subtracted from the original prescribed dose and the process repeated so that the delivered radiation gradually converges on the original prescribed dose.

Claim (Index 58):
The controller according to  claim 57 , the processor being operative with the set of instructions to iteratively perform the following operations until the updated new prescribed dose is determined to be less than a predefined threshold, the operations comprising:\n performing a fluence optimization process for each beam angle using pencil beam data from the first plurality of pencil beams, the patient anatomical data, and the target region data to generate a distribution profile for a sub-dose to be delivered at that beam angle, wherein sub-doses from each beam angle in combination substantially equal the prescribed dose; segmenting the sub-dose distribution profile into segments, each segment comprising a second plurality of pencil beams of matching fluence; determining a segment selection metric of the segments; calculating the amount and distribution of radiation delivered during each segment relative to the patient anatomical data, wherein the radiation is delivered based on the determined segment selection metric of the segments; receiving an updated image depicting patient anatomical data of at least the target region; mapping the prescribed dose onto the updated image as an updated desired dose distribution; subtracting the calculated amount and distribution of radiation from the updated desired dose distribution to create an updated new prescribed dose; and adjusting the sub-doses remaining to be delivered according to the updated new prescribed dose.

Metadata:
- Claim Count in Document: 59.0
- Percentile: 88.0
- Lexical Diversity: 1.76596
- Patent Class: 250.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['11383188', '12991372', '15702981', '15657052', '12991386']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.6798874641625884
- 35 USC 102 Novelty (BERT): 0.5065338035929503
- Combined Prediction Score: 0.6625520981056245
- Mean Citation Score: 240.543086
- Max Citation Score: 260.0018
- Similarity Product: 183.9602414862037

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test