Fluoroscopy-based measurement and processing system and method
A fluoroscopy-based system/method for correcting at least an inclination angle of an acetabular cup during total hip arthroplasty. A computing device processes an image of the surgical area to determine distortion, at least as a function of the reference object in the image. Thereafter, the computing device generates a correction factor and measures an inclination angle of an initially positioned acetabular cub in an anterior posterior image of a patient's pelvis, and corrects, as a function of the correction factor, the measured inclination angle to provide an accurate inclination angle of the acetabular cup.
1. A fluoroscopy-based method for generating an inclination angle of an acetabular cup during total hip arthroplasty, the method comprising:
capturing, by a respective imaging device, an anterior posterior image of a patient's pelvis from an image including a surgical area having an acetabular cup inserted in the patient's pelvis;
measuring, by a computing device, an inclination angle of the acetabular cup in the image;
accessing, by the computing device, a database of stored calibration data, wherein the calibration data include a respective correction factor for each of a plurality of respective imaging devices, further wherein each respective correction factor accounts for image distortion associated with the respective imaging device;
receiving, in a graphical user interface provided by the computing device, a selection of one of the plurality of respective imaging devices;
processing, by the computing device, the selection to access respective calibration data associated with the selected one of the plurality of respective imaging devices;
generating, by the computing device as a function of a correction factor included in the calibration data associated with the selected one of the plurality of respective imaging devices and as a function of the measured inclination angle, a revised inclination angle of the acetabular cup, wherein the revised inclination angle accounts for image distortion associated with the selected one of the plurality of respective imaging devices; and
providing in the graphical user interface, the revised inclination angle.
2. The method of claim 1 , wherein the image distortion is parallax image distortion that affects a measured angle of an area of interest and/or a proportion of the angle.
3. The method of claim 2 , wherein the parallax distortion results from the acetabular cup location being outside a central beam of the respective imaging device.
4. The method of claim 1 , further comprising:
instructing, by the computing device, a robotic element to position a C-arm of the respective imaging device to move a central beam associated with the respective imaging device until the acetabular cup appears spherical.
5. The method of claim 1 , wherein the correction factor is generated using at least one previously captured interoperative fluoroscopic image and at least one postoperative radiographic image.
6. The method of claim 1 , wherein the correction factor is generated as a function of a calculated differences between inclination angles measured in at least one interoperative fluoroscopic image and at least one postoperative radiographic image.
7. The method of claim 1 , wherein the correction factor is generated as a function of an average of calculated differences between a plurality of inclination angles measured in a plurality of interoperative fluoroscopic images and a plurality of postoperative radiographic images.
8. The method of claim 1 , wherein the respective imaging device is a model of a fluoroscope.
9. A fluoroscopy-based system for generating an inclination angle of an acetabular cup during total hip arthroplasty, the system comprising:
a computing device configured with a processor and non-transitory processor readable memory that includes programming code that, when executed, configures the processor to:
capture, by a respective imaging device, an anterior posterior image of a patient's pelvis from an image including a surgical area having an acetabular cup inserted in the patient's pelvis;
measure, by a computing device, an inclination angle of the acetabular cup in the image;
access, by the computing device, a database of stored calibration data, wherein the calibration data include a respective correction factor for each of a plurality of respective imaging devices, further wherein each respective correction factor accounts for image distortion associated with the respective imaging device;
receive, in a graphical user interface provided by the computing device, a selection of one of the plurality of respective imaging devices;
process, by the computing device, the selection to access respective calibration data associated with the selected one of the plurality of respective imaging devices;
generate, by the computing device as a function of a correction factor included in the calibration data associated with the selected one of the plurality of respective imaging devices and as a function of the measured inclination angle, a revised inclination angle of the acetabular cup, wherein the revised inclination angle accounts for image distortion associated with the selected one of the plurality of respective imaging devices; and
provide in the graphical user interface, the revised inclination angle.
10. The system of claim 9 , wherein the image distortion is parallax image distortion that affects a measured angle of an area of interest and/or a proportion of the angle.
11. The system of claim 10 , wherein the parallax distortion results from the acetabular cup location being outside a central beam of the respective imaging device.
12. The system of claim 9 , wherein the non-transitory processor readable memory further includes programming code that, when executed, configures the processor to:
instruct a robotic element to position a C-arm of the respective imaging device to move a central beam associated with the respective imaging device until the acetabular cup appears spherical.
13. The system of claim 9 , wherein the correction factor is generated using at least one previously captured interoperative fluoroscopic image and at least one postoperative radiographic image.
14. The system of claim 9 , wherein the correction factor is generated as a function of a calculated differences between inclination angles measured in at least one interoperative fluoroscopic image and at least one postoperative radiographic image.
15. The system of claim 9 , wherein the correction factor is generated as a function of an average of calculated differences between a plurality of inclination angles measured in a plurality of interoperative fluoroscopic images and a plurality of postoperative radiographic images.
16. The system of claim 9 , wherein the respective imaging device is a model of a fluoroscope.