发明名称 |
Customised surgical apparatus |
摘要 |
A method for producing a customized surgical instrument or prosthesis for a specific patient is described. At least one x-ray image of a body part of the patient is captured. A statistical model having a dense set of anatomical correspondence points across the model is instantiated using image data derived from the at least one x-ray image to generate a patient specific model of the body part having a high accuracy surface. Patient specific data from the patient specific model is used to generate a design of the customized surgical instrument or prosthesis for use in a surgical procedure to be carried out on the body part. The surgical instrument or prosthesis is then manufactured using the design. A computer implemented method for generating the patient specific model of the body part is also described. |
申请公布号 |
US8898043(B2) |
申请公布日期 |
2014.11.25 |
申请号 |
US200912919769 |
申请日期 |
2009.02.26 |
申请人 |
Depuy International Ltd.;Depuy Orthopadie GmbH;Imorphics Ltd. |
发明人 |
Ashby Alan;Bornfleth Harald;Bowes Michael Anthony;Scott Ian Michael;Vincent Graham Richard;Slomczykowski Michal |
分类号 |
G06G7/48;A61B19/00;A61F2/30;A61B17/17 |
主分类号 |
G06G7/48 |
代理机构 |
|
代理人 |
|
主权项 |
1. A method for designing a customised surgical instrument or prosthesis for a body part of a specific patient, the body part having a body part surface, the method comprising the step of:
processing at least one x-ray image of the body part to generate a processed patient image, wherein processing the at least one x-ray image includes filtering the at least one x-ray image, creating a differential image corresponding to differences in intensity of the filtered at least one x-ray image and normalizing peaks in the differential image by applying a normalizer function to the differential image; instantiating a statistical model generated using a minimum description length approach and having a set of anatomical correspondence points across the statistical shape model using image data derived from the processed patient image to generate a patient specific model of the body part having a modeled surface, the instantiating step comprising: (i) generating a pseudo x-ray image of the body part from a CT image reconstructed from the statistical model using parameters of a model of the body; (ii) processing the pseudo x-ray image of the body part to generate a processed pseudo x-ray image, wherein processing the pseudo x-ray image includes filtering the pseudo x-ray image, creating a differential image corresponding to differences in intensity of the filtered pseudo x-ray image, and normalizing peaks in the differential image by applying a sigmoid function to the differential image; (iii) comparing the processed patient image and processed pseudo x-ray images to determine the differences between the processed patient image and the processed pseudo x-ray image; and (iv) repeating steps (i) to (iii) using different parameters of the model of the body part to minimize a cost function indicating the differences between the processed patient image and the processed pseudo x-ray image and generate the patient specific model; and generating a customised surgical instrument or prosthesis having a contact derived from the modeled surface of the patient specific model. |
地址 |
Leeds GB |