Method of imaging the blood flow as a function of time in an object to be examined
First Claim
Patent Images
1. A method of imaging the blood flow as a function of time in an object (3) to be examined, which method includes the following steps:
- a) acquisition of a series of X-ray projection images (Di;
Ej) during administration of a contrast medium to the blood vessels in the object (3) to be examined, b) acquisition of an image data set (H;
K) containing the course of the blood vessels in the object (3) to be examined, c) segmentation of the regions of the blood vessels in the individual X-ray projection images (Di;
Ej) that are filled with contrast medium, d) encoding the image data set (H;
K) in time by comparing the image data set (H;
K) with the segmented X-ray projection images (Dj′
;
Fj), the image data set (H;
K) including an X-ray image data sub-set (H′
) having pixels (Pk) representative of information concerning the course of blood vessels, from which one or more pixel sub-sets (Mj) are acquired; and
e) displaying one or more images (B) formed from the time-encoded image data set (H′
;
R) based on the one or more pixel sub-sets (Mj) and representing the blood flow as a function of time.
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Abstract
The invention relates to a method of imaging the blood flow as a function of time in an object (3) to be examined, which method includes the following steps:
a) acquisition of a series of X-ray projection images (Di; Ej) during administration of a contrast medium to the blood vessels in the object (3) to be examined,
b) acquisition of an image data set (H; K) containing the course of the blood vessels in the object (3) to be examined,
c) segmentation of the regions of the blood vessels in the individual X-ray projection images (Di; Ej) that are filled with contrast medium,
d) encoding the image data set (H; K) in time by comparing the image data set (H; K) with the segmented X-ray projection images (Dj′; Fj), and
e) displaying one or more images (B) formed from the time-encoded image data set (H′; R′) and representing the blood flow as a function of time.
The invention also relates to a correspondingly constructed X-ray device.
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Citations
11 Claims
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1. A method of imaging the blood flow as a function of time in an object (3) to be examined, which method includes the following steps:
-
a) acquisition of a series of X-ray projection images (Di;
Ej) during administration of a contrast medium to the blood vessels in the object (3) to be examined,b) acquisition of an image data set (H;
K) containing the course of the blood vessels in the object (3) to be examined,c) segmentation of the regions of the blood vessels in the individual X-ray projection images (Di;
Ej) that are filled with contrast medium,d) encoding the image data set (H;
K) in time by comparing the image data set (H;
K) with the segmented X-ray projection images (Dj′
;
Fj), the image data set (H;
K) including an X-ray image data sub-set (H′
) having pixels (Pk) representative of information concerning the course of blood vessels, from which one or more pixel sub-sets (Mj) are acquired; and
e) displaying one or more images (B) formed from the time-encoded image data set (H′
;
R) based on the one or more pixel sub-sets (Mj) and representing the blood flow as a function of time.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
an imaging unit (1) with an X-ray source (12) and an X-ray detector (13) for the acquisition of a series of X-ray projection images (Di′
;
Fj) during administration of a contrast medium to the blood vessels, and for the acquisition of an image data set (H;
K) containing the course of blood vessels in the object (3) to be examined,an arithmetic unit (19) for segmenting the regions of the blood vessels in the individual projection images (Di;
Fj) that are filled with the contrast medium and for the encoding in time of the image data set (K) by comparison of the image data set (H;
K) with the segmented X-ray projection images (Dj′
;
Fj), the image data set (H;
K) including an X-ray image data sub-set (H′
) having pixels representative of information concerning distribution of the contrast medium at a given instant from which one or more pixel sub-sets are acquired; and
a display device for the display of one or more images (B) that are derived from the time encoded image data set (H′
;
R′
) based on the pixel sub-set and represent the blood flow as a function of time.
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11. An X-ray device as claimed in claim 10, characterized in that the imaging unit includes a first X-ray source (12) and a first X-ray detector (13) for the acquisition of a first series of two-dimensional X-ray images (Ej) from a fixed X-ray position (r4), and also includes a second X-ray source (12) and a second X-ray detector (13′
- ) for the acquisition of a second series of two-dimensional X-ray images (Ej) from different X-ray positions (r1, r2, r3).
Specification
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Current AssigneeKoninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
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Original AssigneeKoninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
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InventorsKlotz, Erhard Paul Artur, Koppe, Reiner Heinrich, Op De Beek, John, Kuhn, Michael Harald
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Primary Examiner(s)Kim, Robert H.
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Assistant Examiner(s)Kiknadze, Irakli
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Application NumberUS09/749,147Publication NumberTime in Patent Office608 DaysField of Search378/62, 378/8, 378/4, 378/41US Class Current378/62CPC Class CodesA61B 6/4014 arranged in multiple source...A61B 6/481 involving the use of contra...A61B 6/504 for diagnosis of blood vess...
