Systems and Methods for Intra-Operative Image Analysis

Abstract

A system and method that acquire (i) at least a reference image including one of a preoperative image of a surgical site with skeletal and articulating bones and a contralateral image on an opposite side of the patient from the surgical site, and (ii) at least an intraoperative image of the site after an implant has been affixed to the articulating bone. The system preferably generates at least one reference stationary point on at least the skeletal bone in the reference image and at least one intraoperative stationary point on at least the skeletal bone in the intraoperative image. The location of the implant is identified in the intraoperative image, preferably including the position of first and second centers of rotation, which are digitally represented and copied into the reference image to analyze at least one of offset and length differential.

What is claimed is: 
     
         1 . A processor-implemented method comprising:
 determining, for a patient, a set of leg lengths and offset pairs associated with a set of digital femoral prosthetic templates, wherein each leg length and offset pair corresponds to at least one distinct digital femoral prosthetic template, and wherein each digital prosthetic template is associated with a distinct prosthetic in a set of prosthetics;   receiving, one of:
 a selected femoral prosthetic from a graphical user interface (GUI), 
 wherein the selected femoral prosthetic is comprised in the set of femoral prosthetics, or 
 a selected leg length, wherein the selected leg length is comprised in the set of leg length and offset pairs; and 
   interactively displaying, through the GUI:
 in response to the selected femoral prosthetic, a first corresponding leg length and offset pair associated with the selected femoral prosthetic, or 
 in response to the selected leg length, information associated with one or more first corresponding femoral prosthetics associated with the selected leg length. 
   
     
     
         2 . The method of  claim 1 , wherein the method is performed intraoperatively. 
     
     
         3 . The method of  claim 1 , wherein interactively displaying information associated with one or more first corresponding femoral prosthetics further comprises displaying, for each first corresponding femoral prosthetic, a first corresponding offset. 
     
     
         4 . The method of  claim 1 , wherein the GUI comprises a selection menu displaying at least one of: the set of femoral prosthetics, wherein the selected femoral prosthetic is chosen from the selection menu, or a set of leg lengths, wherein the selected leg length is chosen from the selection menu. 
     
     
         5 . The method of  claim 4 , wherein the selection menu is displayed in the form of a chart and interactively displaying the first corresponding leg length and offset pair in response to the selected femoral prosthetic comprises highlighting the first corresponding leg length and offset pair in the chart. 
     
     
         6 . The method of  claim 4 , wherein the selection menu is displayed in the form of a chart and interactively displaying the one or more first corresponding femoral prosthetics in response to the selected leg length comprises highlighting the one or more first corresponding femoral prosthetics associated with the selected leg length in the chart. 
     
     
         7 . The method of  claim 1 , wherein receiving the selected the leg length comprises receiving user input indicating the selected leg length from the GUI. 
     
     
         8 . The method of  claim 7 , wherein interactively displaying the one or more first corresponding femoral prosthetics in response to the selected leg length comprises recommending at least one corresponding optimal fit femoral prosthetic, wherein the at least one corresponding optimal fit femoral prosthetic is selected from the one or more first corresponding femoral prosthetics. 
     
     
         9 . The method of  claim 7 , wherein the user input indicating the selected leg length is provided using a slider control provided by the GUI. 
     
     
         10 . The method of  claim 1 , wherein each femoral prosthetic in the set of femoral prosthetics comprises a corresponding femoral stem, and the GUI comprises a linear indication of at least one corresponding femoral stem parameter. 
     
     
         11 . The method of  claim 10 , wherein the at least one corresponding femoral stem parameter comprises a corresponding femoral stem size. 
     
     
         12 . The method of  claim 11 , wherein the selected femoral prosthetic comprises a corresponding femoral stem size selection, wherein the corresponding femoral stem size selection is made using the linear indication, and wherein the interactive display of the first corresponding leg length and offset pair occurs in response to the corresponding femoral stem size selection. 
     
     
         13 . The method of  claim 1 , wherein interactively displaying the first corresponding leg length and offset pair in response to the selected femoral prosthetic comprises displaying changes to a second corresponding leg length and offset pair relative to the first corresponding leg length and offset pair, wherein the second corresponding leg length and offset pair is associated with a previously selected femoral prosthetic. 
     
     
         14 . The method of  claim 1 , wherein for each distinct femoral prosthetic in the set of femoral prosthetics, a corresponding leg length and offset pair is determined based on a corresponding first reference point associated with a corresponding femoral prosthetic template and a second reference point on a femur of the patient in a preoperative surgical image. 
     
     
         15 . A system comprising:
 a memory,   at least one input device to interact with a Graphical User Interface (GUI),   a display device to display the GUI, and   a processor coupled to the memory, the input device, and the display device wherein the processor is configured to:   determine, for a patient, a set of leg length and offset pairs associated with a set of digital femoral prosthetic templates, wherein each leg length and offset pair corresponds to at least one distinct digital femoral prosthetic template, and wherein each digital prosthetic template is associated with a distinct prosthetic in a set of prosthetics;   receive, one of:
 a selected femoral prosthetic from the GUI, wherein the selected femoral prosthetic is comprised in the set of femoral prosthetics, or 
 a selected leg length, wherein the selected leg length is comprised in the set of leg length and offset pairs; and 
   interactively display, using the GUI, on the display device:
 in response to the selected femoral prosthetic, a first corresponding leg length and offset pair associated with the selected femoral prosthetic, or 
 in response to the selected leg length, information associated with one or more first corresponding femoral prosthetics associated with the selected leg length. 
   
     
     
         16 . The system of  claim 15 , wherein the GUI comprises a selection menu displaying the set of femoral prosthetics and the selected femoral prosthetic is chosen from the selection menu, or a set of leg lengths, wherein the selected leg length is chosen from the selection menu. 
     
     
         17 . The system of  claim 16 , wherein the selection menu is displayed in the form of a chart and to interactively display the one or more first corresponding femoral prosthetics in response to the selected leg length, the processor is configured to highlight the one or more first corresponding femoral prosthetics in the chart. 
     
     
         18 . The system of  claim 15 , wherein to receive the selected the leg length, the processor is configured to receive user input indicating the selected leg length from the GUI. 
     
     
         19 . The system of  claim 18 , wherein the processor is configured to receive user input indicating the selected leg length from a slider control provided by the GUI. 
     
     
         20 . A non-transitory computer-readable medium comprising instructions to configure a processor to:
 determine, for a patient, a set of leg length and offset pairs associated with a set of femoral prosthetics, wherein each leg length and offset pair corresponds to at least one distinct femoral prosthetic;   receive, one of:
 a selected femoral prosthetic from a graphical user interface (GUI), wherein the selected femoral prosthetic is comprised in the set of femoral prosthetics, or 
 a selected leg length, wherein the selected leg length is comprised in the set of leg length and offset pairs; and 
   interactively display, through the GUI:
 in response to the selected femoral prosthetic, a first corresponding leg length and offset pair associated with the selected femoral prosthetic, or 
 in response to the selected leg length, one or more first corresponding femoral prosthetics associated with the selected leg length.