Cardiac phase determination
AssigneeKoninklijke Philips Electronics N.V.
InventorsBabak Movassaghi, Michael Grass, Dirk Schaefer
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Abstract
For the reconstruction of the coronary arteries from rotational coronary angiography data, a crucial point is the selection of the optimal cardiac phase for data reconstruction. According to an exemplary embodiment of the present invention, an automatic approach for deriving optimal reconstruction windows is provided by fully automatically selecting the optimal cardiac phase on the basis of a delayed acquisition protocol where at least one heart phase needs to be acquired in a static projection geometry.
Claims15
Examination apparatus for examination of an object of interest, the examination apparatus comprising:
- an acquisition unit (101) adapted for acquiring a series of projection images of the object of interest on the basis of a delayed acquisition trajectory;
- a determination unit (112) adapted for determining a first subtracted image and a second subtracted image on the basis of the series of projection images;
- wherein the determination unit (112) is further adapted for determining a cardiac phase for data reconstruction on the basis of the first subtracted image and the second subtracted image.
A method of examination of an object of interest with an examination apparatus, method comprising the steps of:
- acquiring a series of projection images of the object of interest on the basis of a delayed acquisition trajectory;
- determining a first subtracted image and a second subtracted image on the basis of the series of projection images;
- and
- determining a cardiac phase for data reconstruction on the basis of the first subtracted image and the second subtracted image.
An image processing device, the image processing device comprising:
- a memory for storing a series of projection images of the object of interest acquired on the basis of a delayed acquisition trajectory;
- a determination unit (112) adapted for determining a first subtracted image and a second subtracted image on the basis of the series of projection images;
- wherein the determination unit (112) is further adapted for determining a cardiac phase for data reconstruction on the basis of the first subtracted image and the second subtracted image.
A computer-readable medium (702), in which a computer program for examination of an object of interest is stored which, when executed by a processor (701), causes the processor to carry out the steps of:
- acquiring a series of projection images of the object of interest on the basis of a delayed acquisition trajectory;
- determining a first subtracted image and a second subtracted image on the basis of the series of projection images;
- determining a cardiac phase for data reconstruction on the basis of the first subtracted image and the second subtracted image.
A program element for examination of an object of interest, which, when being executed by a processor (701), causes the processor to carry out the steps of:
- acquiring a series of projection images of the object of interest on the basis of a delayed acquisition trajectory;
- determining a first subtracted image and a second subtracted image on the basis of the series of projection images;
- determining a cardiac phase for data reconstruction on the basis of the first subtracted image and the second subtracted image.
Dependencies are inferred from the claim text.