摘要:
A rotation positioning device for a coil of a magnetic resonance imaging apparatus, having a cavity in the coil for accommodating a part to be examined, has a backing member that can freely rotate within this accommodating cavity. The backing member is provided with a first driving member and a first rotating member, and the coil is provided with a second driving member and a second rotating member. The first driving member and the second driving member form a transmission pair, and the first rotating member can rotate relative to the second rotating member under the drive of the first driving member and the second driving member. The second driving member can be driven manually or by an external driving source connected thereto to drive the first driving member, thereby driving the backing member to rotate via the cooperation of the first rotating member and the second rotating member. Also, by appropriate configuration of parameters, such as position and size, of the first driving member and the second driving member, the rotation angle or range of the backing member can be controlled precisely and quantitatively.
摘要:
In a signal receiving method and device for a magnetic resonance imaging system, a first loop receiver coil has a saddle receiver coil overlapped thereon, and two individual loop receiver coils or two counter rotating loop receiver coils connected end-to-end are equally spaced from the first loop receiver coil along the axial direction of the first loop receiver coil, forming a dual-loop receiver coil unit. Thus, the magnetic resonance signal generated by human tissue induces current on the dual-loop receiver coil unit following excitation of the signal. When the device is operated, the signal current induced in the saddle receiver coil, the first loop receiver coil and the dual-loop receiver coil unit respectively are added, thus increasing the output signal-to-noise ratio, improving the edge imaging effect, increasing the coverage of the coil signal and improving the signal homogeneity in the imaging area.
摘要:
A magnetic resonance reception coil composite structure is formed by at least one rigid subassembly and at least one flexible subassembly that are connected to each other. The rigid subassembly and the flexible subassembly each include an inner conductor layer, and the inner conductor layer of the rigid subassembly and the inner conductor layer of the flexible subassembly are electrically connected. Different combinations of the rigid subassembly and the flexible subassembly can be used in multiple configurations, so that the magnetic resonance reception coil can achieve complicated shapes to meet the requirements for use at the different sites of a patient, while being comfortable and endurable for the patient.
摘要:
A method includes generating emitted signals using transmitter elements and measuring received signals using receiver elements. The received signals are reflected portions of the emitted signals and the received signals correspond to one or more targets. The method also includes applying a first matched filter to the received signals to determine range information for the received signals, filtering the received signals based on the range information to define filtered signals, and determining calibration parameters using the filtered signals. The method also includes correcting the received signals using the calibration parameters to define calibrated signals and determining angle of arrival information for the received signals using the calibrated signals.
摘要:
A method includes, following specification of an initial transformation as a test transformation that is to be optimized, determining a 2D gradient x-ray image and a 3D gradient dataset of the image dataset, carrying out, for each image element of the gradient comparison image, a check for selection as a contour point, and determining an environment best corresponding to a local environment of the contour point and extending around a comparison point in the gradient x-ray image for all contour points in the at least one gradient comparison image. Local 2D displacement information is determined by comparing the contour points with the associated comparison points, and motion parameters of a 3D motion model describing a movement of the target region between the acquisition of the image dataset and the x-ray image are determined from the displacement information and a registration transformation describing the registration.
摘要:
The present invention relates to a method for quantifying the relative content of a protein in a sample. The present invention also relates to a method for comprising the relative content of a protein in at least two samples.
摘要:
Methods for updating a 2D/3D registration between a three-dimensional image data set corresponding to a target area subjected to a movement and a plurality of two-dimensional projection images of the target area include: selecting a plurality of contour points along a contour, the contour being visible in a first projection image and a three-dimensional image data set registered therewith, the plurality of contour points being associated with a rigid object in the target area; determining a displacement of each contour point of the plurality of contour points between the first projection image and a successively captured second projection image; obtaining movement information for each contour point of the plurality of contour points based on the determined displacement, the movement information describing a movement of the rigid object; and updating the registration based on the obtained movement information.
摘要:
A tank weighing transducer is described. In one embodiment, it comprises: a supporting ring, a cover, a gasket, a locking screw, a weighing sensor, a circuit board, a battery, a base, a supporter nut, a supporter screw, and a detachable supporter. The supporting ring and the cover are connected via the locking screw and the gasket. The weighing sensor and the circuit board are fixed on the base via the locking screw. The battery is put in a battery container on the base. The cover and the base are connected via the locking screw and the detachable supporter is fixed on the base via the supporter nut and the supporter screw. The tank weighing transducer is designed to withstand load for a long period, and has a good impact resistance. In addition, the tank weighing transducer is applicable for weighing the tank automatically for the long period.