A method of operating a magnetic resonance imaging system (10) being connectable to a respiration monitoring means (46) which is configured to provide an output signal (48) whose level represents a respiration state of the subject of interest (20), the method comprising: —a step (54) of providing a prospective acquisition scheme for acquiring magnetic resonance images at each respiration state of a set of selected respiration states of the subject of interest (20), the triggering on the selected respiration states being based on predetermined threshold output signal levels of the respiration monitoring means (46), and, during executing magnetic resonance image acquisition pursuant to the prospective acquisition scheme, a step (58) of comparing actual respiration states at which magnetic resonance images were actually acquired, with the selected respiration states according to the prospective acquisition scheme and predetermined ranges of tolerance (52) of the selected respiration states, —a step (60) of modifying the prospective acquisition scheme, if one of the actual respiration states lies outside the predetermined range of tolerance (52) of the selected respiration state, and a step (62) of proceeding execution of magnetic resonance imaging acquisition pursuant to the modified prospective acquisition scheme; and a magnetic resonance imaging system (10) comprising a control unit (26) that is configured to carry out steps of an embodiment of such a method.

Rapid quantitative evaluations of heart function are carried out with strain measurements from Magnetic Resonance Imaging (MRI) images using a circuit at least partially onboard or in communication with an MRI Scanner and in communication with the at least one display, the circuit including at least one processor that: obtains a plurality of series of MRI images of long and short axis planes of a heart of a patient, with each series of the MRI images is taken over a different single beat of the heart of the patient during an image session that is five minutes or less of active scan time and with the patient in a bore of the MRI Scanner; measures strain of myocardial heart tissue of the heart of the patient based on the plurality of series of MRI images of the heart of the patient; and generates longitudinal and circumferential heart models with a plurality of adjacent compartments, wherein the compartments are color-coded based on the measured strain.

A blood oxygenation sensor is provided comprising: a first current-powered light source to produce light having a first wavelength; a second current-powered light source to produce light having a second wavelength; a light sensor to produce a current signal having a magnitude that is indicative of intensity of light incident upon it; a current level driver circuit that includes a current source configured to couple the current source to alternatively provide current to one of the first current-powered light source and the second light current-powered light source; a processor configured to predict times of occurrence of one or more first time intervals in which arterial volume at a tissue site is at one of a maximum and a minimum; wherein the processor is configured to control the current source, to provide a first pattern of higher power-dissipation current pulses to the first and second current-powered light sources during the first time intervals, and to provide a second pattern of lower power-dissipation current pulses to at least one of the first and second current-powered light sources during second time intervals.

A system for determining a pulse velocity wave comprises an interface for receiving a signal indicating the proximal blood pressure in an artery and for receiving a signal indicating distal blood pressure in the artery. A processing device is configured to determine a proximal rising edge between a diastolic pressure and the systolic pressure of the proximal signal; determine a proximal pressure peak prior to the proximal rising edge; determine a distal rising edge between a diastolic pressure and a systolic pressure of the distal signal; determine a distal pressure peak prior to the distal rising edge and to determine whether the distal pressure peak is in phase advance with respect to the proximal pressure peak; and determine a propagation velocity of a regressive pulse wave depending on the phase advance of the distal pressure peak.

The present disclosure is related to systems and methods for motion detection. The method includes obtaining, via at least one detection device, detection data of a subject located in a field of view (FOV) of a medical device. The method also includes determining motion data of the subject based on the detection data.

Described here are systems and methods for using a laser-induced demagnetization of magnetic particles disbursed in a tracking marker to generate variable susceptibility effects that can be imaged with magnetic resonance imaging (“MRI”). As one example, laser power is delivered to nickel particles using fiber optics. This demagnetization effect can be used in rapid tracking of interventional devices by subtracting the two images acquired when the laser is off and on.

A clinical smart watch, comprises a housing; a band coupled to the housing, at least one of the housing or the band including one or more sensors that measure health-related events of a wearer of the smart watch; a cardiac event risk assessment processor in the housing that receives and processes sensor signals corresponding to the health-related events; and a user interface that includes an the sensor signals, a second risk score generated from a second combination of the user input data and the sensor signals, and a third risk score generated from a third combination of the user input data and the sensor signals. input for providing user input data to the cardiac event risk assessment processor. The cardiac event risk assessment processor executes a prediction model including a first risk score generated from a first combination of the user input data and

The disclosure relates to techniques for triggering magnetic resonance data acquisition. The techniques include detecting a respiration direction of a respiration signal of an acquisition subject, predicting in real time an amplitude peak value of an expiration signal in the current respiration period according to the real-time respiration signal of the acquisition subject, multiplying the amplitude peak value by a preset coefficient, and using the product as a trigger point threshold of the current respiration period. When it is determined that an expiration stage of the current respiration period is starting, the techniques also include calculating in real time or periodically the absolute value of the difference between the amplitude of the current expiration signal and the trigger point threshold currently calculated, and if the absolute value of the difference is less than a preset difference threshold, then triggering MR data acquisition.

The present invention provides a technique capable of accurately and automatically setting a region of interest for acquiring biological information based on a biological information signal obtained from a subject placed in an examination space in a non-contact manner. A signal analyzing unit of a medical imaging apparatus uses the biological information signal for each of a plurality of regions included in a predetermined range among signals measured by a biological information measuring apparatus to select the region of interest in which movement of the subject is to be acquired among the plurality of regions. The movement of the subject is calculated using the biological information signal measured by the biological information measuring apparatus from the selected region of interest.

An implantable medical device system includes an extracardiac sensing device and an intracardiac pacemaker. The sensing device senses a P-wave attendant to an atrial depolarization of the heart via housing-based electrodes carried by the sensing device when the sensing device is implanted outside the cardiovascular system and sends a trigger signal to the intracardiac pacemaker in response to sensing the P-wave. The intracardiac pacemaker detects the trigger signal and schedules a ventricular pacing pulse in response to the detected trigger signal.