A simultaneous implementation method of three-dimensional (3D) subtraction magnetic resonance (MR) arteriography, 3D subtraction MR venography, and color-coded four-dimensional (4D) MR angiography through post-processing of image information of 4D MR angiography, the simultaneous implementation method comprising:
- a first operation of, when a time unit for generating and processing a 4D MR angiography image is a phase, loading 4D MR angiography image data obtained repeatedly from the aortic arch to the top of the head for each phase, extracting an entire region or a necessary region, and storing the extracted region as a file having entire image information including time, space, and signal intensity information;
- a second operation of opening the stored file to output subtraction maximum intensity projection (MIP) images arranged in a time order, and checking whether 4D MR angiography images are arranged in a time order;
- a third operation of generating time-intensity curves of the artery and vein that change according to the concentration and flow of a contrast medium, by designating regions of interest (ROIs) on the M1 segment of the middle cerebral artery and the superior sagittal sinus, and determining an arterial phase, a capillary phase, and a venous phase;
- a fourth operation of color-coding all blood vessels in different colors according to phases when the blood vessels are seen, after processes of dividing blood vessel image information according to the arterial phase, the capillary phase, and the venous phase, extracting only an artery signal by subtracting venous phase image information from arterial phase image information, and extracting only a vein signal by subtracting arterial phase image information from venous phase image information;
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- a fifth operation of storing and outputting image information of 3D subtraction MR arteriography and 3D subtraction MR venography generated in the fourth operation as a grayscale and a color scale, and storing and outputting a color-coded 4D MR angiography image, in which entire hemodynamic information of a 4D MR angiography image is emphasized, and a color-coded 3D MR angiography image.