US 9,955,951 B2 · Sensor coordinate calibration in an ultrasound system

Abstract

There is disclosed an embodiment for performing a calibration of a sensor by using an image registration between a three-dimensional ultrasound image and computerized tomography (CT) image. An ultrasound image forming unit includes an ultrasound probe and forms a three-dimensional ultrasound image of a target object. A sensor is coupled to the ultrasound probe. A memory stores a three-dimensional computed tomography (CT) image of the target object and position information on a position between the three-dimensional ultrasound image and the sensor. A processor performs image registration between the three-dimensional CT image and the three-dimensional ultrasound image to form a first transformation function for transforming a position of the sensor to a corresponding position on the three-dimensional CT image and performs calibration of the sensor by applying the position information to the first transformation function.

Claims28

Dependent claims

A medical imaging apparatus comprising:

an ultrasound probe to transmit and receive an ultrasound signal to obtain an ultrasound image of an object;
a sensor coupled to the ultrasound probe to provide a position information related to an ultrasound imaging position in the object;
and
a processor to extract a certain anatomical feature from the ultrasound image and the certain anatomical feature from a medical image, perform a first registration between the medical image and the ultrasound image based on the certain anatomical feature, perform a second registration between the sensor and the medical image based on the position information and the first registration, and control a display to display a portion of the medical image corresponding to the ultrasound imaging position based on at least one of the first registration and the second registration,
wherein the processor performs the first registration by matching the certain anatomical feature in the ultrasound image the certain anatomical feature in the medical image.

2 more elements

A medical imaging method comprising:

transmitting and receiving an ultrasound signal to obtain an ultrasound image of an object;
providing, by a sensor of an ultrasound apparatus, a position information related to an ultrasound imaging position in the object;
extracting a certain anatomical feature from the ultrasound image and the certain anatomical feature from a medical image;
performing a first registration between the medical image and the ultrasound image, based on the certain anatomical feature;
performing a second registration between the sensor and the medical image, based on the position information and the first registration;
and
controlling a display to display a portion of the medical image corresponding to the ultrasound imaging position, based on at least one of the first registration and the second registration,
wherein the performing of the first registration comprises matching the certain anatomical feature in the ultrasound image and the certain anatomical feature in the medical image.

5 more elements

Dependencies are inferred from the claim text.

Sensor coordinate calibration in an ultrasound system

Life of this patent

Sensor coordinate calibration in an ultrasound system

Life of this patent

Abstract

Claims28