System for generation of a composite medical image of vessel structure
A system reduces artifacts introduced by patient or table motion during generation of a composite image visualizing contrast agent flow. A system for generation of a composite medical image of vessel structure, includes an imaging device for acquiring multiple sequential images of vessel structure of a portion of patient anatomy in the presence of a contrast agent. An imaging processor aligns individual images of the multiple sequential images with a single particular mask image containing background detail of the portion of patient anatomy in the absence of contrast agent. The imaging processor forms data representing multiple digitally subtracted images by subtracting data representing the single particular mask image from aligned individual images of the multiple sequential images. The imaging processor associates different individual images of the multiple digitally subtracted images with different corresponding visual attributes and combines data representing the digitally subtracted images to form a composite image. A reproduction device presents the composite image to a user.
1. A system for generation of a composite medical image of vessel structure, comprising:
an imaging device for acquiring a plurality of sequential images of vessel structure of a portion of patient anatomy in the presence of a contrast agent;
an imaging processor for,
aligning individual images of said plurality of sequential images with a single particular mask image containing background detail of said portion of patient anatomy in the absence of contrast agent,
forming data representing a plurality of digitally subtracted images by subtracting data representing said single particular mask image from aligned individual images of said plurality of sequential images,
associating different individual images of said plurality of digitally subtracted images with different corresponding visual attributes and
combining data representing said digitally subtracted images to form a composite image; and
a reproduction device for presenting said composite image to a user.
2. A system according to claim 1 , wherein
said visual attributes are different colors and
said composite image indicates a color representation of blood flow through said vessel structure.
3. A system according to claim 1 , wherein
said visual attributes are different hues and
said composite image indicates a color representation of blood flow through said vessel structure.
4. A system according to claim 1 , wherein
said visual attributes are different shades and
said composite image indicates a shaded representation of blood flow through said vessel structure.
5. A system according to claim 1 , wherein
said imaging processor associates different individual images of said plurality of digitally subtracted images with different corresponding visual attributes in response to relative time of acquisition of said different individual images.
6. A system according to claim 1 , wherein
said plurality of sequential images are associated with a time window of imaging acquisition determined in response to predetermined information.
7. A system according to claim 1 , wherein
the number of said plurality of sequential images is determined in response to predetermined information.
8. A system according to claim 1 , wherein
said imaging processor aligns said individual images of said plurality of sequential images with said single particular mask image using a translational shift vector.
9. A system according to claim 1 , wherein
said imaging processor combines data representing said digitally subtracted images to form a composite image by using acquisition times relative to start of acquisition of images employed in generating said composite image.
10. A system according to claim 9 , wherein
said imaging processor combines data representing said digitally subtracted images to form a composite image by using peak luminance intensity value of individual pixels to determine luminance intensity of respective individual image pixels of said composite image.
11. A system according to claim 1 , wherein
said imaging processor combines data representing said digitally subtracted images to form a composite image by using peak luminance intensity value of individual pixels to determine luminance intensity of respective individual image pixels of said composite image.
12. A system according to claim 1 , wherein
said imaging processor combines data representing said digitally subtracted images to form a composite image using functions, by determining a hue value
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where H 0 and H f represent starting and ending hues to be used in the output composite color image, T 0 and T f represent starting and ending timestamps of images of said digitally subtracted images used in generation of said composite image, C min and C max represent the minimum and maximum luminance intensity values in said composite image.
13. A system according to claim 1 , wherein
said imaging processor associates different individual pixels of said different individual images of said plurality of digitally subtracted images with different corresponding visual attributes and combines data representing said individual pixels of said digitally subtracted images to form said composite image.
14. A method for generation of a composite medical image of vessel structure, comprising the activities of:
acquiring a plurality of sequential images of vessel structure of a portion of patient anatomy in the presence of a contrast agent;
aligning individual images of said plurality of sequential images with a single particular mask image containing background detail of said portion of patient anatomy in the absence of contrast agent;
forming data representing a plurality of digitally subtracted images by subtracting data representing said single particular mask image from aligned individual images of said plurality of sequential images;
associating different individual images of said plurality of digitally subtracted images with different corresponding colors;
combining data representing said digitally subtracted images to form a composite image indicating a color representation of blood flow through said vessel structure; and
presenting said composite image to a user.
15. A method according to claim 14 , wherein
said activity of associating different individual images of said plurality of digitally subtracted images with different corresponding colors comprises associating different individual pixels of said different individual images of said plurality of digitally subtracted images with different corresponding colors and
said activity of combining data representing said digitally subtracted images comprises combining data representing individual pixels of said digitally subtracted images to form said composite image.
16. A system for generation of a composite medical image of vessel structure, comprising:
an imaging device for acquiring a plurality of sequential images of vessel structure of a portion of patient anatomy in the presence of a contrast agent;
an imaging processor for,
aligning individual images of said plurality of sequential images with a single particular mask image containing background detail of said portion of patient anatomy in the absence of contrast agent,
forming data representing a plurality of digitally subtracted images by subtracting data representing said single particular mask image from aligned individual images of said plurality of sequential images,
associating different individual pixels of different individual images of said plurality of digitally subtracted images with different corresponding colors and
combining data representing said different individual pixels of different individual images of said plurality of digitally subtracted images to form a composite image indicating a color representation of blood flow through said vessel structure; and
a reproduction device for presenting said composite image to a user.