34results about How to "Suppresses Motion Artifacts" patented technology

The invention provides a flexible graphene electroencephalogram capacitive electrode capable of inhibiting motion artifacts. The electrode comprises a substrate player, a fabric conductive layer, a first motion artifact inhibition layer, a filler layer, a second motion artifact inhibition layer, a touch surface layer and an insulated shielding layer, wherein flexible fabric forms the substrate layer; conductive cloth forms the fabric conductive layer; conductive sponge and conductive fabric form the first motion artifact inhibition layer; an insulated rubber plate forms the filler layer; the conductive cloth and the conductive sponge form the second motion artifact inhibition layer; a graphene coating forms the touch surface layer; insulated fabric forms the insulated shielding layer. The electrode is an electroencephalogram dry electrode according with a capacity coupling principle, a flexible electrode material is adopted, accordingly, no irritation and harm are caused to skin, and the electrode can be worn for a long time.

The invention relates to a bioelectrical signal flexible dry electrode and a preparing method thereof. The electrode is suitable for conduction of electroencephalogram signals of a non-hair or less-hair area (forehead area), muscle electrical signals and electrocardiogram signals and the like. The dry electrode is composed of two parts, namely the conductive flexible dry electrode body and an electrical connector. The conductive flexible dry electrode body is made of a flexible composite conductive material and has flexibility and good electrical conductivity; the surface is a three-dimensional arc-shaped curved surface and can make sufficient contact with skin and can restrain motion artifacts. The electrical connector is integrally poured in the electrode through the integrally forming process, the process complexity is reduced, and the contact impedance of the electrical connector and the electrode body is reduced. The bioelectrical signal flexible dry electrode has the advantages of being free of conductive glue/paste, easy and convenient to operate, low in impedance, stable, reliable and flexible in long term, comfortable and safe to wear, low in cost and simple in machining process.

In a non-Cartesian sampling method, a trajectory along which a measurement space is sampled is optimized. That is, data placed on one spiral trajectory heading outward from the center of the measurement space is sampled from a plurality of echo signals. The sampling is performed such that the data is placed continuously, without overlapping, in order from the center to the outside. Alternatively, the data may be overlapped and a mismatch between echo signals may be corrected using the data of the overlapped portion.

The invention discloses an electrocardiogram monitoring chest belt with a motion artifact inhibition function. The chest belt takes a flexible high-elasticity fabric as a base layer, two flexible fabric electrocardiograph dry electrodes, two pairs of auxiliary dry electrodes and a reference electrode are fixed on the base layer, the two flexible fabric electrocardiograph dry electrodes are horizontally distributed in the middle of the base layer, each pair of dry electrodes include upper auxiliary dry electrodes and lower auxiliary dry electrodes, the upper auxiliary dry electrodes and the lower auxiliary dry electrodes are symmetrically distributed on the upper side and the lower side of each flexible fabric electrocardiograph dry electrode, the two upper auxiliary dry electrodes are connected by the aid of a fiber resistor, the reference electrode is positioned at horizontal center between the two flexible fabric electrocardiograph dry electrodes, signal lines of each electrode penetrate the base layer and are connected with a signal processing module fixed on the other side of the base layer, the signal processing module is used for receiving signals of the electrodes and processing the signals to obtain electrocardiogram signals, and special woven seamless pressure adhesive is hollowed according to the shapes of the electrodes and adhered with the base layer to serve as aninsulation shielding layer. By the aid of the chest belt, motion artifacts can be effectively inhibited.

The embodiment of the invention provides an inhibition method for a motion artifact in colored blood flow imaging and equipment. The method comprises the steps that the blood flow speed and a corresponding grayscale image in colored blood flow imaging are acquired, the blood flow speed, smaller than a flow speed threshold value, of the blood flow speed is removed, the blood flow speed after processing is obtained, and at the same position of colored blood flow imaging, if the blood flow speed of multiple frames of images before the moment of colored blood flow imaging is zero, or the blood flow speed of only frame of image is not zero, and/or a grayscale value of the corresponding grayscale image is larger than or equal to a grayscale histogram mean value, the blood flow speed after processing is determined as the motion artifact; the motion artifact is removed, and the true blood flow speed is obtained. The inhibition method for the motion artifact in colored blood flow imaging and the equipment can have the advantage that the motion artifact in colored blood flow imaging can be inhibited.

An ultrasonic Doppler blood flow imaging method and system are provided. The method includes: acquiring a blood flow velocity measuring interest region and a number of transmitting sub-apertures; determining, according to the number of transmitting sub-apertures, inclination angle of a plane wave in each of the transmitting sub-aperture; determining, according to inclination angle, array element excitation delay time in each of the transmitting sub-aperture; controlling, according to array element excitation delay time, all of transmitting sub-apertures to synchronously transmit plane waves, and receiving echo signals with a full aperture; generating a radio frequency signal sequence according to echo signals; extracting blood flow Doppler signals of blood flow velocity measuring interest region according to radio frequency signal sequence; determining a blood flow velocity according to blood flow Doppler signals; and generating a Doppler blood flow image of blood flow velocity measuring interest region according to blood flow velocity.

The present disclosure relates to systems and methods for reconstructing an Emission Computed Tomography (ECT) image. The systems, having at least one machine each of which has at least one processorand storage, may perform the methods to obtain ECT projection data, the ECT projection data corresponding to a plurality of voxels; determine a plurality of gate numbers for the plurality of voxels, the plurality of gate numbers relating to motion information of the plurality of voxels; and reconstruct an ECT image based on the ECT projection data and the plurality of gate numbers.