2 results about "Strain imaging" patented technology

The strain imaging system (110) can acquire first ultrasound data of a region of interest of a heart of a subject at a first frame rate during a first cardiac cycle of the heart of the subject. The strain imaging system (110) can acquire second ultrasound data of a subset of the region of interest of the heart of the subject at a second frame rate during a second cardiac cycle of the heart of the subject. The strain imaging system (110) can determine information related to cardiac deformation of the region of interest of the heart of the subject using strain imaging, the first ultrasound data, and the second ultrasound data. The strain imaging system (110) can display the information related to cardiac deformation of the region of interest of the heart of the subject.

Methods and apparatuses for multiple degree-of-freedom fatigue testing of a specimen. The apparatus includes a first platform, a second platform, a plurality of actuator assemblies, a load cell, a mounting plate, a specimen support, a direct-strain imaging system, and a local sense and control system. Each actuator assembly includes a servo-control, a position encoder, and a piston that is constructed to move in a linear direction in accordance with the servo-control. Each piston is rotatably connected to the second platform. The load cell is connected to the second platform and constructed to output force measurements in three orthogonal directions and torque measurements about the three orthogonal directions. The mounting plate is constructed to hold a portion a specimen. The specimen support is constructed to hold another portion of the specimen. The direct-strain-imaging system includes a camera that is constructed to record a plurality of images of the specimen during fatigue testing. The local sense and control system constructed to receive: a loading specification, the force measurements and torque measurements from the load cell, and position information from each position encoder, and output control commands to each servo-control of the plurality of actuator assemblies based on the received loading specification. The control commands are updated in time in accordance with the position information from each position encoder and the force measurements and torque measurements from the load cell.