Image Registration Using Interventional Devices
A system receives an image volume of a patient. A catheter applied to the patient contains at least one sensor, which may be a microcoil and which is detectable in the image volume. A size and a shape of a region of interest are pre-defined. A processor determines a location of the at least one sensor in the image volume. The image volume is generated by a medical imaging device. The processor defines the shape and size of the region of interest relative to the location of the at least one sensor to determine the region of interest in the image volume. Image data of the region of interest in the image volume and of the region of interest in a previous image volume are registered. The region of interest is determined during an interventional procedure on the patient.
1 . A method for determining a region of interest in an image volume of a patient, comprising:
defining on a processor a size and a shape of the region of interest;
applying to the patient a catheter with at least one sensor which is enabled to be detected in the image volume;
the processor receiving data representing the image volume;
the processor determining a location of the at least one sensor in the image volume;
the processor determining the region of interest in the image volume based on the location of the at least one sensor in the image volume;
the processor receiving image data of a previously acquired image volume of the patient; and
the processor registering a part of the previous acquired image volume defined by the region of interest with the region of interest in the image volume.
2 . The method of claim 1 , wherein the at least one sensor is a microcoil.
3 . The method of claim 1 , wherein the at least one sensor is a passive sensor.
4 . The method of claim 1 , wherein the catheter and the at least one sensor is moved relative to the patient to obtain a second location in the image volume and the processor determines a second region of interest.
5 . The method of claim 1 , wherein the shape of the region of interest depends upon a bounding shape of a location of the catheter in the patient.
6 . The method of claim 1 , wherein the shape of the region of interest depends upon a geometry of an imaged organ.
7 . The method of claim 1 , wherein the processor processes image data inside the region of interest.
8 . The method of claim 1 , wherein the location of the at least one sensor is used for an alignment of the previously acquired image volume with an interventional device.
9 . The method of claim 1 , wherein the location of the at least one sensor in the image volume is used by the processor as a reference frame relative to the patient.
10 . The method of claim 1 , wherein the processor determines the region of interest during an interventional procedure on the patient.
11 . A system to determine a region of interest in an image volume of a patient, comprising:
a memory enabled to store and retrieve data;
a processor enabled to execute instructions to perform the steps:
defining a size and a shape of the region of interest;
receiving data representing the image volume;
determining a location of at least one sensor of a catheter in the image volume;
determining the region of interest in the image volume based on the location of the at least one sensor in the image volume; and
registering a part of a previously acquired image volume defined by the region of interest with the region of interest in the image volume.
12 . The system of claim 11 , wherein the at least one sensor is a microcoil.
13 . The system of claim 11 , wherein the at least one sensor is a passive sensor.
14 . The system of claim 11 , wherein the at least one sensor is moved relative to the patient to obtain a second location in the image volume and the processor determines a second region of interest.
15 . The system of claim 11 , wherein the shape of the region of interest depends upon a bounding shape of a location of a catheter in the patient.
16 . The system of claim 11 , wherein the shape of the region of interest depends upon a geometry of an imaged organ.
17 . The system of claim 11 , wherein the processor processes image data inside the region of interest.
18 . The system of claim 11 , wherein the location of the at least one sensor is used for an alignment of the previously acquired image volume with an interventional device.
19 . The system of claim 11 , wherein the location of the at least one sensor in the image volume is used by the processor as a reference frame relative to the patient.
20 . The system of claim 11 , wherein the processor determines the region of interest during an interventional procedure on the patient.