Pre-operative planning for reorientation surgery: surface-model-free approach using simulated x-rays

A computer implemented method comprising, by a processing unit of a computing device:

• accessing a first volumetric data set of a medical image comprising anatomic structures;
• determining a volumetric region with respect to the first volumetric data set of an anatomic structure to be reoriented;
• computing a first measurement of a parameter of the anatomic structure;
• receiving a positional change of the volumetric region with respect to the first volumetric data set;
• generating a second volumetric data set corresponding to the first volumetric data set and responsive to the positional change to the volumetric region;
• generating a change image comprising a digitally reconstructed radiograph (DRR) from the second volumetric data set;
• providing the change image for display;
• and
• receiving a second or subsequent input defining a second or subsequent positional change and performing the steps of:
• one of:
• a) updating the second volumetric data set responsive to the second or subsequent positional change;
• and b) generating a further volumetric data set responsive to the second or subsequent positional change;
• generating an updated change image comprising a digitally reconstructed radiograph (DRR) from one of the second volumetric data set as updated and the further volumetric data set;
• and
• providing the updated change image;
• thereby to iteratively perform reorientation of the anatomic structure.

A computing device comprising a processing unit and a storage unit coupled thereto, the storage unit storing instructions, which when executed by the processing unit, configure the computing device to:

• access a first volumetric data set of a medical image comprising anatomic structures;
• determine a volumetric region with respect to the first volumetric data set of an anatomic structure to be reoriented;
• compute a first measurement of a parameter of the anatomic structure;
• receive a positional change of the volumetric region with respect to the first volumetric data set;
• generate a second volumetric data set corresponding to the first volumetric data set and responsive to the positional change to the volumetric region;
• generate a change image comprising a digitally reconstructed radiograph (DRR) from the second volumetric data set;
• provide the change image for display;
• and
• receive a second or subsequent input defining a second or subsequent positional change and performing the steps of:
• one of:
• a) updating the second volumetric data set responsive to the second or subsequent positional change;
• and b) generating a further volumetric data set responsive to the second or subsequent positional change;
• generating an updated change image comprising a DRR from one of the second volumetric data set as updated and the further volumetric data set;
• and
• providing the updated change image;
• thereby to iteratively perform reorientation of the anatomic structure.