CARDIAC ROADMAPPING

• US 20100049038A1
• Filed: 02/25/2008
• Published: 02/25/2010
• Est. Priority Date: 03/02/2007
• Status: Active Grant

• Current Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: Florent, Raoul, Valente, Stephane
• Granted Patent: US 8,255,037 B2
• Time in Patent Office: Days
• US Class Current: 600/425
• CPC Class Codes: A61B 2034/107 Visualisation of planned trajectories or target regions
• CPC Class Codes: A61B 2090/364 Correlation of different images or relation of image positions in respect to the body
• CPC Class Codes: A61B 2090/376 using X-rays, e.g. fluoroscopy
• CPC Class Codes: A61B 34/20 Surgical navigation systems; Devices for tracking or guiding surgical instruments, e.g. for frameless stereotaxis
• CPC Class Codes: A61B 6/12 Arrangements for detecting or locating foreign bodies
• CPC Class Codes: A61B 6/481 involving the use of contrast agents
• CPC Class Codes: A61B 6/504 for diagnosis of blood vessels, e.g. by angiography
• CPC Class Codes: A61B 6/5235 combining images from the same or different ionising radiation imaging techniques, e.g. PET and CT

Abstract

According to an exemplary embodiment of the present invention, a cardiac roadmapping technique is provided, in which a static roadmap is built onto which a view of the intervention device is projected at the correct location. This new viewing mode combines the advantages of both roadmapping, i.e. accurate localization, and the advantages of a motion-free view, i.e. maximum readability.

Claims

1. Examination apparatus for cardiac roadmapping for examination of an object of interest located in a volume of interest, the examination apparatus comprising a calculation unit adapted for:

performing a reference map creation of the volume of interest on the basis of a first image sequence of the volume of interest;

performing a device map sequence creation of the volume of interest on the basis of a second image sequence of the volume of interest;

performing a projection of the device map sequence onto the reference map, resulting in a navigation sequence;

wherein the reference map is a static roadmap of the object of interest.

2. Examination apparatus of claim 1,

wherein the object of interest is a cardiac vessel-tree;

wherein the first image sequence is an angiogram of the object of interest;

wherein the second image sequence is a life-time sequence acquired during an intervention of the object of interest; and

wherein the reference map is a reference vessel-map.

3. Examination apparatus of claim 1,

wherein the projection of the device map onto the reference map is a registration performed on the basis of a sequence of composed motion vector fields, resulting in a sequence of registered device maps.

4. Examination apparatus of claim 1,

wherein the reference vessel map is selected from a vessel map sequence.

5. Examination apparatus of claim 4,

wherein the selection of the reference vessel map comprises a vessel cycle extraction corresponding to a full cardiac cycle.

6. Examination apparatus of claim 2,

wherein the calculation unit is further adapted for performing a device map to vessel map motion estimation after creation of the device map, resulting in a first sequence of vector fields.

7. Examination apparatus of claim 6,

wherein the device map to vessel map motion estimation comprises a sequence-to-sequence motion estimation and matching operation.

8. Examination apparatus of claim 1, wherein the calculation unit is further adapted for:

performing a vessel map to reference map motion estimation after creation of the reference map, resulting in a second sequence of vector fields; and

performing a motion composition on the basis of the first and second sequences of vector fields, resulting in the sequence of composed motion vector fields.

9. Examination apparatus of claim 4, wherein the calculation unit is further adapted for:

superimposing the sequence of registered device maps to the reference vessel map.

10. Examination apparatus of claim 1,

the examination apparatus (100) being configured as one of the group consisting of a material testing apparatus, a medical application apparatus and a micro CT system.

11. A method for cardiac roadmapping for examination of an object of interest located in a volume of interest with an examination apparatus (100), method comprising the steps of:

performing a reference map creation of the volume of interest on the basis of a first image sequence of the volume of interest;

performing a device map sequence creation of the volume of interest on the basis of a second image sequence of the volume of interest;

performing a projection of the device map sequence onto the reference map, resulting in a navigation sequence;

wherein the reference map is a static roadmap of the object of interest.

12. A computer-readable medium (402), in which a computer program for cardiac roadmapping for examination of an object of interest located in a volume of interest is stored which, when executed by a processor (401), causes the processor to carry out the steps of:

performing a reference map creation of the volume of interest on the basis of a first image sequence of the volume of interest;

performing a device map sequence creation of the volume of interest on the basis of a second image sequence of the volume of interest;

performing a projection of the device map sequence onto the reference map, resulting in a navigation sequence;

wherein the reference map is a static roadmap of the object of interest.

13. A program element for cardiac roadmapping for examination of an object of interest located in a volume of interest which, when being executed by a processor (401), causes the processor to carry out the steps of:

performing a reference map creation of the volume of interest on the basis of a first image sequence of the volume of interest;

performing a device map sequence creation of the volume of interest on the basis of a second image sequence of the volume of interest;

performing a projection of the device map sequence onto the reference map, resulting in a navigation sequence;

wherein the reference map is a static roadmap of the object of interest.

14. An image processing device for cardiac roadmapping for examination of an object of interest located in a volume of interest, the image processing device comprising:

a memory for storing a data set of the object of interest; and

a calculation unit adapted for;

performing a reference map creation of the volume of interest on the basis of a first image sequence of the volume of interest;

performing a device map sequence creation of the volume of interest on the basis of a second image sequence of the volume of interest;

performing a projection of the device map sequence onto the reference map, resulting in a navigation sequence;

wherein the reference map is a static roadmap of the object of interest.