Abstract: This application discloses a method, a computer device, a storage medium, and a program product for obtaining the Index of Microvascular Resistance (IMR). The method comprises the following steps: obtaining the resting pressure of the coronary artery ostium, and calculating the cardiac output pressure based on the resting pressure of the coronary artery ostium. Obtaining the hyperemic pressure of the coronary artery ostium, and obtaining the coronary flow reserve based on the cardiac output pressure, the resting pressure, and the hyperemic pressure. Obtaining the medical images of the coronary system, obtaining the three-dimensional model of the target vessel, and calculating the morphological parameters of the coronary artery based on the three-dimensional model of the target vessel. Calculating the resting blood flow and the flow resistance based on the morphological parameters.

Abstract: This application relates to an improved method for generating microcatheter paths, a method for shaping a mandrel, a computer device, a readable storage medium, and a program product. The method for generating the microcatheter path includes obtaining a cerebral vascular model, generating a centerline, determining the proximal starting point of the centerline, and successively generating a plurality of unit segments from the proximal starting point towards the distal aneurysm. Each unit segment includes a series of connected straight segments and curved segments, and the unit segments are successively connected to form at least a part of the microcatheter path.

Abstract: A stenosis assessment method and device based on the intracranial digital subtraction angiographic (DSA) imaging, including acquiring the intracranial DSA imaging and extracting two planar images containing the target blood vessel from the DSA imaging, wherein the two planar images have different shooting angles. According to the two planar images, a 3D model of the target vessel is established. Based on the established 3D model of the target vessel and the DSA imaging, the hemodynamic simulation of the target vessel is performed. The disclosure realizes the functional assessment of intracranial vascular stenosis, improves the diagnostic accuracy, and provides certain assistance for neurologists to determine intervention means. The disclosure of noninvasive FFR technology in the assessment of intracranial vascular stenosis can only rely on angiography for functional assessment, saving the medical examination cost of patients. It has more convenient operation and higher repeatability.

Abstract: The disclosure discloses a method, a device, a system and a computer storage medium for obtaining the CT perfusion imaging parameter maps of brain. The method includes: obtaining CT perfusion images, pre-processing the CT perfusion images, and obtaining discrete contrast agent concentration curves C(n) of each pixel point in the brain tissue; reading the acquisition time information of the CT perfusion images to obtain the acquisition time arrays T(n); intercepting the acquisition time arrays T(n) to obtain the relative acquisition time arrays t(n); combining the discrete contrast agent concentration curves C(n) with the corresponding relative acquisition time arrays t(n) to obtain the discrete time-concentration curves C(tn) of each pixel point in the brain tissue; after fitting or interpolating the discrete time-concentration curves C(tn), re-discretizing at the same time interval, and obtaining the discrete time-concentration curves C(n)? of each pixel point in brain tissue.