PATENT CLAIM ANALYSIS

Application Number: 15946362
Application Type: Utility
Filing Date: 2018-04
Publication Date: 2018-08
Patent Classification: ["348", "077000"]

Abstract:
The disclosed calibration method includes a calibration phantom positioned on an adjustable table on the surface of a mechanical couch, with the phantom's centre at an estimated location for the iso-centre of a radio therapy treatment apparatus. The calibration phantom is then irradiated using the apparatus, and the relative location of the center of the calibration phantom and the iso-centre of the apparatus is determined by analyzing images of the irradiation of the calibration phantom. The calibration phantom is then repositioned by the mechanical couch applying an offset corresponding to the determined relative location of the centre of the calibration phantom and the iso-centre of the apparatus to the calibration phantom. Images of the relocated calibration phantom are obtained, to which the offset has been applied, and the obtained images are processed to set the co-ordinate system of a stereoscopic camera system relative to the iso-centre of the apparatus.

Claim (Index 1):
A method of calibrating a 3D camera system for use with a radio therapy treatment apparatus, the method comprising:\n storing a 3D computer model of a surface of a calibration phantom with the center of the modelled phantom located at the origin for the co-ordinate system for the 3D computer model; positioning a calibration phantom with the calibration phantom's center at an estimated location for the iso-center of a radio therapy treatment apparatus; irradiating the calibration phantom using the radio therapy treatment apparatus and determining the relative location of the center of the calibration phantom and the iso-center of the radio therapy treatment apparatus by analyzing images of the irradiation of the calibration phantom utilizing a 3D camera system to obtain images of the calibration phantom and processing images obtained by the 3D camera to generate a further 3D computer model of the surface of the calibration phantom; comparing the modelled surface of the calibration phantom generated on the basis of images obtained by the 3D camera system with the stored model to determine a transformation to make the generated 3D computer model of the surface of the calibration phantom coincide with the stored computer model; and setting the co-ordinate system of the 3D camera system on the basis of the sum of the transformation required to make the generated 3D computer model of the surface of the calibration phantom coincide with the stored computer model and the transformation required to make location of the center of the calibration phantom coincident with the iso-center of the radio therapy treatment apparatus.

Metadata:
- Claim Count in Document: 3.0
- Percentile: 91.0
- Lexical Diversity: 2.54839
- Patent Class: 348.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['14899112', '14424376', '15525847', '11234533', '15647160']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.6075316853970874
- 35 USC 102 Novelty (BERT): 0.5503266602044682
- Combined Prediction Score: 0.6018111828778254
- Mean Citation Score: 236.736742
- Max Citation Score: 411.16925
- Similarity Product: 379.9356409205496

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

Dataset: test