Abstract: In some examples, an embolization device includes multiple sections with three-dimensional non-helical structures when deployed at a vascular site. The multiple sections include a first section and one or more second sections that are smaller than the first section. The first section may have a deployed structure configured to anchor the device at a vascular site (e.g., a blood vessel) of a patient while each of the one or more second sections may be formed from loops that configured to pack and obstruct the vascular site. In some cases, the embolization device also includes a third section having a deployed configuration with multiple helical windings or loops is configured to anchor the embolization device at the vascular site.

Abstract: Disclosed is a tricycle component, and in particular to a reverse tricycle support structure in which two steering wheels are arranged in the front and a driving wheel is arranged in the back. The reverse tricycle support structure includes a frame, a front two-wheel fixing bracket and a rear flat fork. The frame includes a frame rear section, a frame middle section and a frame front section, the frame front section is fixedly connected to the front two-wheel fixing bracket, the frame rear section is movably connected to the rear flat fork, the front two-wheel fixing bracket is fixed on two front wheels, an upper end of a rear center single shock absorption member is hingedly fixed on the frame, and a lower end of the rear center single shock absorption member is hingedly fixed on the rear flat fork.

Abstract: Disclosed is a tricycle component, and in particular to a reverse tricycle support structure in which two steering wheels are arranged in the front and a driving wheel is arranged in the back. The reverse tricycle support structure includes a frame, a front two-wheel fixing bracket and a rear flat fork. The frame includes a frame rear section, a frame middle section and a frame front section, the frame front section is fixedly connected to the front two-wheel fixing bracket, the frame rear section is movably connected to the rear flat fork, the front two-wheel fixing bracket is fixed on two front wheels, an upper end of a rear center single shock absorption member is hingedly fixed on the frame, and a lower end of the rear center single shock absorption member is hingedly fixed on the rear flat fork.

Abstract: Systems and methods for performing MRI include using a RF gradient field for spatial encoding. In particular implementations, |B+i|-selective pulses designed using the Shinnar-Le Roux algorithm can be provided as the excitation pulse for the RF gradient field. Further, frequency encoding for the RF gradient field can be based on the Bloch-Siegert (BS) shift. Together, these techniques can be used to support MRI based on RF gradient encoding instead of the conventional Bo encoding.

Abstract: Embodiments of the invention concern systems and methods for performing MRI using RF gradients for spatial encoding. One aspect of the invention involves providing |B1+|-selective pulses designed using the Shinnar-Le Roux algorithm. Another aspect of the invention involves RF encoding based on the Bloch-Siegert (BS) shift. Together, these techniques can be used to support MRI based on RF gradient encoding instead of the conventional B0 encoding.

Abstract: The present disclosure provides a microscopic vision measurement method based on the adaptive positioning of the camera coordinate frame which includes: calibrating parameters of a microscopic stereo vision measurement model (201); acquiring pairs of synchronical images and transmitting the acquired images to a computer through an image acquisition card (202); calculating 3D coordinates of feature points in a scene according to the matched pairs of feature points in the scene obtained from the synchronical images and the calibrated parameters of the microscopic stereo vision measurement model (203); and performing specific measurement according to the 3D coordinates of the feature points in the scene (204). With the method, the nonlinearity of the objective function in the microscopic vision calibration optimization is effectively decreased and a better calibration result is obtained.

Abstract: The present disclosure provides a microscopic vision measurement method based on the adaptive positioning of the camera coordinate frame which includes: calibrating parameters of a microscopic stereo vision measurement model (201); acquiring pairs of synchronical images and transmitting the acquired images to a computer through an image acquisition card (202); calculating 3D coordinates of feature points in a scene according to the matched pairs of feature points in the scene obtained from the synchronical images and the calibrated parameters of the microscopic stereo vision measurement model (203); and performing specific measurement according to the 3D coordinates of the feature points in the scene (204). With the method, the nonlinearity of the objective function in the microscopic vision calibration optimization is effectively decreased and a better calibration result is obtained.