CALIBRATION FOR 3D RECONSTRUCTION OF MEDICAL IMAGES FROM A SEQUENCE OF 2D IMAGES

摘要

Provided herein are systems and methods (i.e., utilities) that are directed to correcting misalignments or offsets between a series or sequence of medical images. The utility corrects offsets between a series of medical images obtained where an imaging device (e.g., ultrasound probe) is supported by a positioning mechanism where there is misalignment between an imaging axis or other reference point of the imaging device and the axis of movement of the positioning device. The determination of this offset between these axis allows for calculating a transformation that allows for placing each of the series images into a common frame of reference.

主权项

1. A method for calibrating images obtained from an ultrasound imaging device where the imaging device is supported by a positioning mechanism, comprising:
obtaining at least first and second images from an ultrasound imaging device while said positioning device supports the ultrasound imaging device in first and second positions, respectively, wherein said positioning mechanism is designed to limit movement of said ultrasound imaging device to a single axis of movement between said first and second positions; identifying a first distance between said an object in said first image and a known reference point in said first image; identifying a second distance between said object in said second image and the known reference point in the second image; determining a difference in said first and second distances; and calculating a transformation, based on said differences of said first and second images, wherein said transformation defines a calibration of offsets between said reference point of said ultrasound images and said axis of movement of said positioning mechanism.