Method for providing a 3D X-ray image dataset of a patient's heart
First Claim
1. A method for generating a 3D X-ray image dataset of a heart of a patient, comprising:
- recording a sequence of 2D X-ray images of the heart with heartbeat phases at image recording instants being measured and assigned to the images;
dividing a range of the heartbeat phases into a plurality of intervals;
generating a plurality of 3D image datasets, each 3D image dataset being generated from the 2D X-ray images assigned to a heartbeat phrase from a respective interval;
assigning each 3D image dataset to the heartbeat phase from the respective interval;
choosing one of the 3D image datasets as a reference image dataset;
calculating movement fields of remaining 3D image datasets relative to the reference image dataset;
selecting a heartbeat phase from the heartbeat phases;
picking a 2D X-ray image assigned to the selected heartbeat phase;
generating a second 3D image dataset from the picked 2D X-ray image;
determining a position of the selected heartbeat phase relative to the heartbeat phases;
calculating an interpolated movement field for the second 3D image dataset relative to the reference image dataset based on the movement fields and the position; and
deforming the second 3D image dataset using the interpolated movement field to generate the 3D X-ray image dataset.
2 Assignments
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Accused Products
Abstract
X-ray images are recorded of a patient'"'"'s heart and the heartbeat phase is registered as that is done. The heartbeat phases are coarsely divided into intervals and all X-ray images that have been assigned heartbeat phase from the interval are used for reconstructing a 3D image dataset. The movement fields of the other 3D image datasets are then calculated for one of said 3D image datasets. Movement fields are vector fields indicating the movements of similar structures from one local area to the other. A departure is then made from the coarse interval division, and for each heartbeat phase a movement field is interpolated individually or at least for fairly short intervals from the movement fields determined in advance, which field is used for generating a deformed 3D image dataset that has been imaged onto a reference heartbeat phase. The deformed 3D image datasets are then added together.
18 Citations
14 Claims
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1. A method for generating a 3D X-ray image dataset of a heart of a patient, comprising:
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recording a sequence of 2D X-ray images of the heart with heartbeat phases at image recording instants being measured and assigned to the images; dividing a range of the heartbeat phases into a plurality of intervals; generating a plurality of 3D image datasets, each 3D image dataset being generated from the 2D X-ray images assigned to a heartbeat phrase from a respective interval; assigning each 3D image dataset to the heartbeat phase from the respective interval; choosing one of the 3D image datasets as a reference image dataset; calculating movement fields of remaining 3D image datasets relative to the reference image dataset; selecting a heartbeat phase from the heartbeat phases; picking a 2D X-ray image assigned to the selected heartbeat phase; generating a second 3D image dataset from the picked 2D X-ray image; determining a position of the selected heartbeat phase relative to the heartbeat phases; calculating an interpolated movement field for the second 3D image dataset relative to the reference image dataset based on the movement fields and the position; and deforming the second 3D image dataset using the interpolated movement field to generate the 3D X-ray image dataset. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An X-ray device for generating a 3D X-ray image dataset of a heart of a patient, comprising:
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an X-ray source that emits X-rays to the patient; an X-ray detector that records a sequence of 2D X-ray images of the heart with heartbeat phases at image recording instants being measured and assigned to the images; and a computing device that; divides a range of the heartbeat phases into a plurality of intervals, generates a plurality of 3D image datasets, each 3D image dataset being generated from the 2D X-ray images assigned to a heartbeat phrase from a respective interval, assigns each 3D image dataset to the heartbeat phase from the respective interval, chooses one of the 3D image datasets as a reference image dataset, calculates movement fields of remaining 3D image datasets relative to the reference image dataset, selects a heartbeat phase from the heartbeat phases, picks a 2D X-ray image assigned to the selected heartbeat phase, generates a second 3D image dataset from the picked 2D X-ray image, determines a position of the selected heartbeat phase relative to the heartbeat phases, calculates an interpolated movement field for the second 3D image dataset relative to the reference image dataset based on the movement fields and the position, and deforms the second 3D image dataset using the interpolated movement field to generate the 3D X-ray image dataset. - View Dependent Claims (14)
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Specification