| CPC A61B 8/0841 (2013.01) [A61B 8/4254 (2013.01); A61B 8/483 (2013.01); A61B 34/20 (2016.02)] | 20 Claims |
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17. An ultrasound system for determining a shape of an interventional medical device in during an interventional medical procedure, the ultrasound system comprising:
an ultrasound imaging probe configured to emit ultrasound imaging beams during the interventional medical procedure and generate ultrasound imagery of a volume that includes an interventional medical device;
a passive ultrasound sensor fixed to the interventional medical device, the passive ultrasound sensor configured to receive the ultrasound beams emitted by the ultrasound imaging probe; and
a controller comprising a processor configured to execute instructions stored in memory, and, when executed by the processor, the instructions cause the processor to:
identify a location of the passive ultrasound sensor as a point on the interventional medical device in an ultrasound measurement space based on the ultrasound imaging beams emitted from the ultrasound imaging probe during an interventional medical procedure, wherein the point is identified based on analysis of a signal received by the passive ultrasound sensor as the ultrasound imaging beams sweep the field of view of the ultrasound imaging probe, and wherein the location of the interventional medical device corresponds to the location of the passive ultrasound sensor;
obtain, from the ultrasound imaging probe, the ultrasound imagery of the volume that includes the interventional medical device;
dynamically set filtering constraints to filter anatomical features from the ultrasound imagery based on the interventional medical procedure, wherein the filtering constraints include pixel intensity constraints;
determine the shape of the interventional medical device by image processing of the ultrasound imagery based on the identified location of the point on the interventional medical device, wherein the imaging processing comprises initializing imaging processing based on the identified location of the point and filtering of the ultrasound imagery based on the filtering constraints to enhance image features of the interventional medical device to be identifiable in the ultrasound imagery; and
segment the interventional medical device to generate a segmented representation of the shape of the interventional medical device, wherein the segmented representation of the interventional medical device is overlaid on the ultrasound imagery.
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