Cerebral blood volume correction method and apparatus, and angiography equipment

Abstract

Embodiments of the present invention disclose a cerebral blood volume correction method and apparatus. The method comprises steps of: detecting bifurcation points of arteries on each frame of image in an image sequence of cerebral arterial geometries of a patient; for any group of arteries of a same status, selecting areas of interest for the arteries on each frame of image; for each area of interest, extracting a blood flow TIC of the area of interest from the image sequence; according to the TIC of each area of interest, calculating blood flow parameter values of the corresponding artery; for any group of arteries of a same status, calculating blood flow differences between different arteries, and according to the blood flow differences, generating a CBV compensation factor M for each artery; based on the anatomical structure of the 3D CBV image cross section of cerebral arteries of the patient, dividing the cross section into a plurality of artery blood-supply areas, and according to the M of the corresponding artery in each artery blood-supply area, correcting the CBV value of the artery blood-supply area. The cerebral blood volume correction method and apparatus, and angiography equipment provided by the present invention reduce the impact of uneven CM distribution on cerebral perfusion symmetry.

Description

technical field [0001] The present invention relates to the technical field of angiography, in particular to a method and device for correcting CBV (Cerebral Blood Volume, cerebral blood volume), and to angiography equipment. Background technique [0002] CBV perfusion imaging reveals hemodynamic information at the capillary level within the brain parenchyma. [0003] Intra-arterial CBV imaging can be achieved using a flat-panel detector equipped with an angiography system. Specifically, the C-arm of the flat-panel detector rotates around the patient, while the angiography system performs iodinated imaging of the patient's aortic arch and acquires three-dimensional images of the angiography. . [0004] In order to create a CBV map, a steady-state AIF (Aretrial Input Function, arterial input equation) value needs to be calculated from the histogram analysis of the vascular tree. Setting: When either aorta or main vein is completely filled with blood, its CBV value will be c...

AI Technical Summary

Problems solved by technology

However, the geometrical characteristics of blood vessels vary from patient to patient, which affects the mixing between blood and CM (Contrast Media)

[0005] Furthermore, perfect mixing between blood and CM is difficult to achieve due to the limited distance between the CM injection site and the arterial ostia, and the rapid blood flow can cause CM streamlines in the aorta

[0006] Due to complex flow variations, even for arteries of the same size, the amount of CM entering each artery will be different, which will cause: Even in some people with normal cerebral circulation, CBV imaging will show perfusion deviation, so that at worst cases, may lead to inaccurate clinical assessment and treatment decisions

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