Method and system for pre-operative implant sizing
A system for sizing an implant for a patient pre-operatively comprises a processor unit. A non-transitory computer-readable memory may be communicatively coupled to the processing unit and comprising computer-readable program instructions executable by the processing unit for obtaining at least one radiographic patient image of at least one patient bone with a scale marker relative to the bone, the scale marker having a known geometry, setting a scale of the at least one radiographic patient image using the known geometry of the scale marker, generating a three-dimensional bone model representative of the at least one patient bone using the at least one radiographic patient image and the scale, identifying an implant size and/or an implant model using implant models and dimensions of the three-dimensional bone model based on said scale, and outputting the implant size and/or the implant model for the patient.
1. A system for sizing an implant for a patient pre-operatively comprising:
a processor unit;
a non-transitory computer-readable memory communicatively coupled to the processing unit and comprising computer-readable program instructions executable by the processing unit for
obtaining at least one radiographic patient image of at least one patient bone with a scale marker relative to the bone, the scale marker having a known geometry,
setting a scale of the at least one radiographic patient image using the known geometry of the scale marker,
performing an overlap two-dimensional rendering of a non-patient three-dimensional bone model and projecting the overlap two-dimensional rendering on the at least one radiographic patient image to generate a three-dimensional bone model representative of the at least one patient bone, and
outputting the three-dimensional bone model representative of the at least one patient bone.
2. The system according to claim 1 , further including modifying the non-patient three-dimensional bone model using the at least one radiographic patient image and the scale.
3. The system according to claim 2 , wherein modifying the non-patient three-dimensional bone model includes receiving a user input of rotation, translation and/or scaling of the non-patient three-dimensional bone model.
4. The system according to claim 3 , further including updating the overlap two-dimensional rendering relative to the at least one radiographic patient image through the user input.
5. The system according to claim 1 , further comprising a screen display, and wherein projecting the overlap two-dimensional rendering includes displaying the overlap two-dimensional rendering on the at least one radiographic patient image.
6. The system according to claim 5 , wherein displaying the overlap two-dimensional rendering on the at least one radiographic patient image includes displaying the overlap two-dimensional rendering with plane indicators showing planes of the three-dimensional bone model.
7. The system according to claim 6 , wherein displaying the overlap two-dimensional rendering with plane indicators representative of planes of the three-dimensional bone model includes displaying the plane indicators as lines forming a window for each plane.
8. The system according to claim 5 , wherein displaying the overlap two-dimensional rendering on the at least one radiographic patient image includes displaying the overlap two-dimensional rendering on two of said at least one radiographic patient image.
9. The system according to claim 8 , wherein the at least one radiographic patient image is in a sagittal plane of the patient, and another radiographic patient image is in a frontal plane of the patient.
10. The system according to claim 1 , further including obtaining the non-patient three-dimensional bone model with a virtual scale marker positioned relative to the non-patient three-dimensional bone model to match an arrangement of the at least one patient bone with its scale marker.
11. The system according to claim 10 , wherein generating the three-dimensional bone model representative of the at least one patient bone includes using the virtual scale marker with said scale.
12. The system according to claim 1 , further comprising the scale marker.
13. The system according to claim 12 , wherein the scale marker is without any symmetry plane.
14. The system according to claim 12 , wherein the scale marker has a strap whereby the scale marker is configured to be strapped to the patient.
15. The system according to claim 1 , further comprising an X-ray generator and an x-ray detector.
16. The system according to claim 15 , wherein obtaining at least one radiographic patient image of at least one patient bone includes generating the least one radiographic patient image with the X-ray generator and the x-ray detector.
17. The system according to claim 1 , further including obtaining the non-patient three dimensional bone model from an atlas of bone models.
18. The system according to claim 1 , wherein outputting the three-dimensional bone model representative of the at least one patient bone includes outputting the three-dimensional bone model with an implant model overlaid onto the three-dimensional bone model.