System and method for determining pelvic tilt based on antero-posterior radiographic images for intraoperative alignment of an acetabular component
Functional patient-specific acetabular component alignment is important in total hip arthroplasty. A method for acetabular component alignment by calculating pelvic tilt from an anteroposterior radiograph of the pelvis of a patient may be replicated intraoperatively for patient-specific alignment. A system for automated generation of the pelvic tilt from an anteroposterior radiograph presented improves the efficacy and accuracy of total hip arthroplasty.
1 . A method to provide intraoperative surgical guidance to position an acetabular component comprising:
receiving an anterior posterior pre-operative radiograph of a subject;
determining a pelvic tilt from the anterior posterior pre-operative radiograph of a subject, wherein the pelvic tilt is calculated by the steps of:
locating a trans-teardrop line from the anterior posterior pre-operative radiograph of the subject, the trans-teardrop line defined by a first point on the most inferior part of the right teardrop and a second point on the most inferior part of the left teardrop;
locating the superior portion of the pubic symphysis from the anterior posterior pre-operative radiograph of a subject;
determining a trans-teardrop to pubic symphysis line from a measurement of the trans-teardrop line to the superior portion of the pubic symphysis from anterior posterior pre-operative radiograph of a subject;
calculating a ratio of the trans-teardrop to pubic symphysis line to the trans-teardrop line using the length of the trans-teardrop to pubic symphysis line over the trans-teardrop line;
calculating the pelvic tilt, wherein the pelvic tilt is derived from the ratio of the trans-teardrop to pubic symphysis line to the trans-teardrop line;
receiving an intraoperative image of the subject; and
intraoperatively positioning the acetabular component based on the pelvic tilt of the subject in need of acetabular component positioning.
2 . The method of claim 1 , wherein the step of intra-operatively positioning the acetabular component comprises overlaying the intraoperative image with an at least one digital measuring tool.
3 . A system comprising: an imaging system and computing platform coupled to the imaging system configured to:
obtain at least one anteroposterior image of a patient;
generate measurements from the at least one anteroposterior image to provide a calculation of pelvic tilt, wherein the calculation of pelvic tilt comprises;
locating a trans-teardrop line defined by a first point on a most inferior part of a right teardrop and a second point on the most inferior part of a left teardrop from the at least one anteroposterior image;
locating a superior portion of a pubic symphysis from the at least one anteroposterior image;
determining a trans-teardrop to pubic symphysis line from a measurement of the trans-teardrop line to the superior portion of the pubic symphysis;
calculating a ratio of the trans-teardrop to pubic symphysis line to the trans-teardrop line using a length of the trans-teardrop to pubic symphysis line over the trans-teardrop line; and
deriving the pelvic tilt from the ratio of the trans-teardrop to pubic symphysis line to the trans-teardrop line; and
project calculated pelvic tilt on to at least one intraoperative image anteroposterior image of the patient for intraoperatively positioning an acetabular component.
4 . A system for providing surgical guidance with a computing platform comprising:
a processor and an automated computer software, wherein the automated computer software is configured to:
receive a patient image data of a subject, wherein the patient image data is processed by an automated computer software by the processor, wherein the patient image data comprises at least an anteroposterior radiographic image;
locate a trans-teardrop line and a trans-teardrop to a pubic symphysis line;
determine the distance of the trans-teardrop to the pubic symphysis line and the distance of the trans-teardrop line by the automated computer software;
calculate by the automated computer software a ratio of the trans-teardrop to pubic symphysis line to the trans-teardrop line using the length of the trans-teardrop to pubic symphysis line over the trans-teardrop line;
calculate by the automated computer software a pelvic tilt, wherein the pelvic tilt is derived from the ratio of the trans-teardrop to pubic symphysis line to the trans-teardrop line; and
output the calculation of the pelvic tilt;
receive an intraoperative image of the subject; and
overlay the image data and the calculation of the pelvic tilt on a graphical user interface to provide surgical guidance for intraoperatively positioning an acetabular component based on the pelvic tilt of the subject in need of acetabular component positioning.
5 . The system of claim 4 , the automated computer software further configured to:
receive at least one intra-operative image of the pelvis of the patient, wherein the intra-operative image captures an alignment of an acetabular component; and
intra-operatively align the acetabular component from the alignment of the acetabular component from the at least one intra-operative image.
6 . The system of claim 4 , the automated computer software further configured to map a grid to the patient image data to provide a processed image data.
7 . The system of claim 4 , wherein locating the trans-teardrop line and the trans-teardrop to pubic symphysis line further comprises:
providing by the automated computer software a graphical user interface for selecting a left and right most inferior part of the teardrop from the patient image data;
selecting a superior portion of the pubic symphysis the within the patient image data;
and generating by the automated computer software the trans-teardrop to pubic symphysis line and the trans-teardrop line.
8 . The system of claim 4 , wherein locating the trans-teardrop line and the trans-teardrop to pubic symphysis line further comprises:
accessing the patient image data by a digital image analysis software, wherein the digital image analysis software locates the left and right most inferior part of the teardrop from the patient image data and wherein the digital image analysis software locates a superior portion of the pubic symphysis from the patient image data; and generating by the automated computer software the trans-teardrop to pubic symphysis line and the trans-teardrop line.
9 . The system of claim 4 , the automated computer software further configured to:
provide an artificial intelligence engine and at least one dataset configured to output information, wherein the dataset at least comprises the patient image data and a reference set;
generate by the artificial intelligence engine the output information based on the dataset; and
dynamically display output information on a graphical user interface.