An apparatus for generating focused currents in biological tissue is provided. The apparatus comprises an electric source capable of generating an electric field across a region of tissue and means for altering the permittivity of the tissue relative to the electric field, whereby a displacement current is generated. The means for altering the permittivity may be a chemical source, optical source, mechanical source, thermal source, or electromagnetic source.

Disclosed herein is an ultrasonic imaging apparatus and a control method thereof. The ultrasonic imaging apparatus includes an acquisition unit configured to acquire a volume data of an object and a process configured to determine whether an acquisition position of the volume data is within an allowable range by using pre-stored landmark information and configured to acquire a plurality of reference planes from the volume data when the acquisition position of the volume data is within the allowable range.

A method may include positioning a catheter, including at least one electrode, within an esophagus such that the electrode is proximate to at least one sympathetic ganglion. The methods may further include recruiting the sympathetic ganglion via an electrical signal, monitoring the recruitment of the sympathetic ganglion, and, based on the monitoring the recruitment of the sympathetic ganglion, adjusting the electrical signal from the at least one electrode.

A system includes a processing circuit configured to receive signals corresponding ultrasound data, extract a blood flow waveform from the signals, the blood flow waveform corresponds to a single pulse of the signals, determine a curvature characteristic of the blood flow waveform based on a plurality of local curvature parameters, and identify a medical condition for the blood flow waveform using the blood flow waveform. Each of the plurality of local curvature parameters indicates a degree to which the blood flow waveform deviates from a straight line at a location on the blood flow waveform.

A method, or corresponding dynamic display system, for customizing a controller of a display system includes presenting a visual stimulus to a subject at at least one known location relative to the subject's eye gaze; measuring brain activity of the subject's left and right brain hemispheres in response to the subject's viewing of the stimulus; processing the measured brain activity to determine a frequency-dependent metric of the measured brain activity; assessing independent cognitive capacities of the subject's left and right brain hemispheres based on the frequency-dependent metric; and adjusting a function of the controller in the display system according to the assessed independent capacities, such as by adjusting the function to change a stimulus load in a visual hemifield according to the brain activity in the contralateral brain hemisphere. Example applications include head-up display (HUD), augmented reality (AR) or virtual reality (VR) display systems, and brain injury assessment systems.

Disclosed herein are acoustic transmission systems comprising an acoustic wave generator configured to generate an acoustic wave and propagate the acoustic wave through a tissue of a specimen, and a non-Hermitian complementary metamaterial (NHCMM) configured to add a first amount of energy amplification coherently to the acoustic wave to account for energy loss in the acoustic wave as a result of the wave propagating through the tissue of the specimen. The acoustic wave generator can be an ultrasound generator, and the tissue can be a cranium.

An apparatus for ultrasound irradiation of a body part (208) includes a first ultrasound transducer (216), and a second ultrasound transducer (212) mounted oppositely, and is configured: a) such that at least two ultrasound receiving elements, for determining a relative orientation of the first to the second transducer, are attached to the first transducer; b) for a beam, from the first transducer, causing cavitation, and/or bubble destruction of systemically circulating microbubbles, within the body part; or c) both with the attached elements and for the causing. The apparatus registers, with said first transducer, the second transducer, by using as a reference respectively the features a) and/or b). A detachable subsystem includes either a therapy or imaging transducer, to form a combination imaging and therapy system, the subsystem being configured for removable coupling to correspondingly an imaging or therapy subsystem comprising a head frame (204) to which is mounted an imaging or therapy transducer, the imaging or therapy subsystem for registering the imaging or therapy transducer, one to the other, by the above method.

The invention concerns a detecting apparatus (12) for imaging at least two areas of a brain of a subject (10), the detecting apparatus (12) comprising: a holder comprising: a frame (14) devoted to be cemented on the skull of the subject (10), the frame (14) delimitating an inner portion (18) which is transparent to ultrasound waves, a removable imaging device comprising: a platform (16) delimitating an inner space (28), the inner space (28) facing the inner portion (18), a fixing element (30) adapted to temporary fix and lock the platform (16) to the holder, an ultrasound probe (32), and a moving stage (34) holding the ultrasound probe (32) and being adapted to move the ultrasound probe (32) within the inner space (28).

Disclosed herein is an ultrasonic imaging apparatus and a control method thereof. The ultrasonic imaging apparatus includes an acquisition unit configured to acquire a volume data of an object and a process configured to determine whether an acquisition position of the volume data is within an allowable range by using pre-stored landmark information and configured to acquire a plurality of reference planes from the volume data when the acquisition position of the volume data is within the allowable range.

A two-dimensional wideband ultrasound transducer array for three or four-dimensional (volume+time) non-invasively imaging/mapping of electrical current in, for example, the brain through the skull, or the heart. The probe also has unique capabilities for three-dimensional transcranial or transthoracic pulse echo ultrasound (tissue structure, motion, bone thickness) and doppler blood flow imaging. The handheld device interfaces with an ultrasound delivery system for applications to human brain or heart imaging, ultrasound neuromodulation, and therapy. The handheld ultrasound array enables three-dimensional steering of an ultrasound beam through the human skull or chest for ultrasound, doppler, and acoustoelectric imaging and related modalities to aid in the diagnosis and treatment of brain or heart disorders.