Method for registration of an image applied to digital subtracted angiography
First Claim
1. A method for the registration of images in digitized subtracted angiography comprising:
- irradiating a body by radiation;
acquiring a first digitized mask image without an injection of a contrast agent into the body;
injecting the contrast agent into the body;
acquiring a second digitized contrast image;
dividing the mask image with regular geometrical patterns;
registering the mask image relative to the contrast image through the use of landmarks defined at the corners of the geometrical patterns;
subtracting these two images after registration;
displaying the subtracted image;
testing the robustness of the landmarks; and
if the robustness is insufficient, a subdivision is made of the regular geometrical patterns.
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Abstract
In registration of images in digitized subtracted angiography, X-rays irradiate a patient'"'"'s body. A first digitized mask image is acquired without an injection of the contrast agent into the body, then the contrast agent is injected into the body, and a second digitized contrast image is acquired. The mask image is divided with regular geometrical patterns and a registration is made of the mask image relative to the contrast image through the use of landmarks defined at the corners of the geometrical patterns. These two images are subtracted after registration, and the subtracted image is displayed. The robustness of the landmarks is furthermore tested, and if the robustness is insufficient, a subdivision is made of the regular geometrical patterns.
68 Citations
20 Claims
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1. A method for the registration of images in digitized subtracted angiography comprising:
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irradiating a body by radiation;
acquiring a first digitized mask image without an injection of a contrast agent into the body;
injecting the contrast agent into the body;
acquiring a second digitized contrast image;
dividing the mask image with regular geometrical patterns;
registering the mask image relative to the contrast image through the use of landmarks defined at the corners of the geometrical patterns;
subtracting these two images after registration;
displaying the subtracted image;
testing the robustness of the landmarks; and
if the robustness is insufficient, a subdivision is made of the regular geometrical patterns. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification