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Hyperintensities refer to areas of high intensity on types of magnetic resonance imaging (MRI) scans of the human brain or that of other mammals that reflect lesions produced largely by demyelination and axonal loss. These small regions of high intensity are observed on T2 weighted MRI images (typically created using 3D FLAIR) within cerebral white matter (white matter lesions, white matter hyperintensities or WMH) or subcortical gray matter (gray matter hyperintensities or GMH). They are usually seen in normal aging but also in a number of neurological disorders and psychiatric illnesses. For example, deep white matter hyperintensites are 2.5 to 3 times more likely to occur in bipolar disorder and major depressive disorder than control subjects. WMH volume, calculated as a potential diagnostic measure, has been shown to correlate to certain cognitive factors. Hyperintensities appear as "bright signals" (bright areas) on an MRI image and the term "bright signal" is occasionally used as a synonym for a hyperintensity.
Brain venation plexus vesicle segmentation method
The invention discloses a brain venation plexus vesicle segmentation method, and the method comprises the steps: firstly reinforcing the signal contrast of the whole venation plexus through a high-resolution T1 enhanced image, and then achieving the stable segmentation of vesicles through employing the two steps: the whole segmentation of the venation plexus and the segmentation of the vesicles. In the vesicle segmentation process, as the vesicles are filled with cerebrospinal fluid, the difference between a venation plexus entity (high signal) and the cerebrospinal fluid (low signal) in a T1 enhanced image is utilized, a vesicle segmentation reference threshold value is set, and vesicle voxel separation is realized through low-pass filtering. According to the method, the vesicle structure of the cerebral venation plexus can be segmented, the volume of the vesicle structure can be calculated, and the volume of the vesicle of the cerebral venation plexus can be used as an image marker for auxiliary diagnosis of nerve diseases such as Alzheimer's disease.
Owner:SECOND AFFILIATED HOSPITAL ZHEJIANG UNIV COLLEGE OF MEDICINE
Magnetic resonance imaging method, medium and equipment based on pseudo-continuous arterial spin labeling
PendingCN121795874ASensorsTelemetric patient monitoringContinuous arterial spin labelingMR - Magnetic resonance
The invention relates to a magnetic resonance imaging method based on pseudo-continuous arterial spin labeling, a medium and equipment. According to the magnetic resonance imaging method, on the basis of pseudo-continuous artery spin labeling, PCASL sequence parameters are optimized, then a multi-modal structure image is combined with a PCASL image, a heart artery blood perfusion weighted image is generated, and more accurate parameter estimation is obtained. Furthermore, a proper range is selected to optimize the acquisition sequence through parameter fitting, and the processing process of combining the acquired image and the PCASL image is optimized, so that motion artifacts and physiological noise can be effectively inhibited, the signal-to-noise ratio is improved, and accurate parameters can be acquired more quickly and efficiently. The cardiac artery blood perfusion weighted image generated by the method has various clinical applications such as coronary heart disease diagnosis, myocardial infarction evaluation, cardiac surgery evaluation, cardiac rehabilitation evaluation and the like.
Owner:MEI HOSPITAL UNIV OF CHINESE ACAD OF SCI +1
AI-powered histological fingerprinting
Systems and methods for AI-powered histological fingerprinting in magnetic resonance imaging. MR signal data of an object is acquired using a high sensitivity scanner. Ground truth tissue microstructure data is acquired for the object. A forward model is learned using machine learning. The forward model is used to generate a dictionary or to train a model to map the signals to the histological parameters including the tissue microstructure of a scanner object. A signal-to-signal translation model is also provided to provide signals with improved sensitivity.
Owner:SIEMENS HEALTHINEERS AG
A multi-channel image tube and a method for manufacturing the same
This invention provides a multi-channel imaging tube and its preparation method, belonging to the field of medical device technology. The imaging tube includes a tubular body with a cavity for accommodating imaging material. The tubular body has a first central channel and several peripheral channels, with the central channel's axis coinciding with the axis of the tubular body. The peripheral channels are located around the first central channel, and their axes are aligned along the length of the tubular body. Multiple first partitions are arranged in parallel within the tubular body, each partition along its length; a first connecting gap is provided between the edge of each partition and the inner wall of the tubular body. This imaging tube, by filling the tubular body with imaging material to form a continuous three-dimensional imaging network, allows the applicator to be completely surrounded by the high-signal imaging material, enabling accurate identification of the applicator's location during MR scanning and providing a reliable basis for precise execution of treatment plans.
Owner:SUN YAT SEN UNIVERSITY CANCER CENTER (CANCER HOSPITAL AFFILIATED TO SUN YAT SEN UNIVERSITY CANCER RESEARCH INSTITUTE OF SUN YAT SEN UNIVERSITY)
Coil assembly and method of manufacturing the same, magnetic resonance imaging apparatus
The present application relates to a coil assembly and a manufacturing method thereof, and a magnetic resonance imaging device, the magnetic resonance imaging device comprising the coil assembly, the coil assembly comprising a substrate and at least one coil array unit, the coil array unit being arranged on the substrate, each coil array unit comprising at least one quadrature coil and a set of linear coils, the set of linear coils comprising at least two linear coils arranged in sequence along a first direction, the at least two linear coils overlapping to form an overlapping area, and the at least one quadrature coil in each coil array unit being arranged one-to-one with the overlapping area. By arranging the quadrature coil, one quadrature coil is arranged in each overlapping area, and the signal-to-noise ratio of the overlapping area can be improved by the quadrature coil, so that the signal receiving quality is improved.
Owner:WUHAN UNITED IMAGING LIFE SCIENCE INSTRUMENT CO LTD