PATENT CLAIM ANALYSIS

Application Number: 16298722
Application Type: Utility
Filing Date: 2019-03
Publication Date: 2019-10
Patent Classification: ["382", "128000"]

Abstract:
Alignment precision technology, in which a system accesses image data of a bone to which a reference marker array is fixed. The system generates a three-dimensional representation of the bone and the reference markers, defines a coordinate system for the three-dimensional representation, and determines locations of the reference markers relative to the coordinate system. The system accesses intra-operative image data that includes the bone and a mobile marker array that is attached to an instrument used in a surgical procedure. The system co-registers the intra-operative image data with the three-dimensional representation by matching the reference markers included in the intra-operative image data to the locations of the reference markers. The system determines locations of the mobile markers in the co-registered image and determines a three-dimensional spatial position and orientation of the instrument relative to the bone.

Claim (Index 21):
A method comprising:\n accessing an MRI image of at least a portion of a cadaver patient's leg that includes a knee of the cadaver patient; determining cartilage thickness for the knee of the cadaver patient based on the accessed MRI image; accessing a CT image of at least a portion of the cadaver patient's leg that includes CT imaging of at least a portion of a femur to which a reference fiducial marker array is fixed in advance of a TKA procedure and CT imaging of at least a portion of a tibia, the reference fiducial marker array comprising at least three reference fiducial markers that are captured in CT imaging and motion capture imaging; defining, on the accessed CT image and accounting for the determined cartilage thickness, a first coordinate system for the femur and a second coordinate system for the tibia; generating a processed CT image by calculating a three-dimensional transformation between the CT image on which the first coordinate system for the femur and the second coordinate system for the tibia have been defined and a pattern of the reference fiducial marker array as measured by the CT image; accessing intra-operative motion capture data of at least a portion of the cadaver patient's leg that includes motion capture imaging of at least a portion of the femur to which the reference fiducial marker array is fixed and motion capture imaging of at least a portion of the tibia, the intra-operative motion capture data being captured during the TKA procedure on the cadaver patient's leg and including motion capture imaging of a mobile fiducial marker array that is attached to a cutting block used in the TKA procedure on the cadaver patient's leg, the mobile fiducial marker array comprising at least three mobile fiducial markers that are captured in motion capture imaging; co-registering the intra-operative motion capture data with the processed CT image by regression fitting the reference fiducial markers included in the intra-operative motion capture data to the reference fiducial markers included in the processed CT image; generating a processed motion capture image by calculating a three-dimensional transformation between the co-registered intra-operative motion capture data and processed CT image and a pattern of the mobile fiducial marker array as measured by the intra-operative motion capture data; accessing a first CAD model of the mobile fiducial marker array; co-registering the first CAD model of the mobile fiducial marker array with the processed motion capture image by regression fitting the mobile fiducial markers included in the first CAD model of the mobile fiducial marker array to the mobile fiducial markers included in the processed motion capture image; accessing a second CAD model that represents alignment of cutting block relative to the mobile fiducial marker array based on the mobile fiducial marker array being attached to the cutting block; generating an alignment image that represents alignment of the cutting block to the femur during the TKA procedure by calculating a three-dimensional transformation between the co-registered first CAD model of the mobile fiducial marker array and processed motion capture image and the second CAD model that represents alignment of cutting block relative to the mobile fiducial marker array; accessing a design for the TKA procedure that represents a designed alignment of the cutting block to the femur in the TKA procedure; comparing the alignment image that represents alignment of the cutting block to the femur during the TKA procedure with the design for the TKA procedure; based on comparison results, determining an indication of precision of alignment of the cutting block to the femur during the TKA procedure relative to the designed alignment of the cutting block to the femur in the TKA procedure; and providing output based on the determined indication of precision of alignment of the cutting block to the femur during the TKA procedure relative to the designed alignment of the cutting block to the femur in the TKA procedure.

Metadata:
- Claim Count in Document: 50.0
- Percentile: 99.0
- Lexical Diversity: 2.76923
- Patent Class: 382.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15102705', '16110297', '14272147', '13730585', '13664613']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.2868391548721408
- 35 USC 102 Novelty (BERT): 0.6132849134552374
- Combined Prediction Score: 0.3194837307304505
- Mean Citation Score: 350.79896
- Max Citation Score: 534.7429
- Similarity Product: 511.5540282292365

Labels:
- Claim Label 101: 0
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 0
- Label 101 Adjusted: 0

Dataset: test