CPC A61B 5/055 (2013.01) [G01R 33/50 (2013.01); G01R 33/5608 (2013.01); G01R 33/56341 (2013.01); A61B 34/20 (2016.02); A61N 1/0534 (2013.01)] | 18 Claims |
1. A method of imaging an implant device in a computing device having a processor interconnected with a memory and a display, comprising, at the processor:
obtaining a first pre-operative magnetic resonance (MR) image of a patient tissue, the first pre-operative MR image containing a first magnetic field strength indicator;
after insertion of the implant device in the patient tissue, obtaining a second intra-operative MR image of the patient tissue and the implant device, the second intra-operative MR image containing a second magnetic field strength indicator smaller than the first magnetic field strength indicator;
registering the second intra-operative MR image with the first pre-operative MR image;
generating a composite image from the first pre-operative MR image and the second intra-operative MR image, wherein generating the composite image includes:
for each voxel of the second intra-operative MR image, (i) determining a difference between a value of the voxel and a value of a corresponding voxel of the first pre-operative MR image, (ii) determining whether the difference excedes a threshold and (iii) when the difference exceeds the threshold selecting the voxel of the second intra-operative MR image as indicating a presence of the implant device; and
substituting the selected voxels of the second intra-operative MR image for the corresponding voxels of the first pre-operative MR image; and
presenting thee composite image on the display.
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