A method for real-time vascular modeling and assessment is disclosed. Modeling, in some embodiments, comprises receiving a plurality of 2-D angiographic images of a portion of a vasculature of a subject, and processing the images to automatically detect 2-D features, for example, paths along vascular extents, which are projected into 3-D to determine homologous features among blood vessels and construct 3-D vascular extents and determine other vascular characteristics. Assessment, in some embodiments, comprises processing models selectively different from one another to produce one or more vascular indexes which indicate a diagnostic preference, for example, to perform a medical intervention such as a stent implantation. Speed is achieved, for example, by the method being optimized for determining the effects of a medical intervention. In some embodiments, results are produced quickly enough to allow use of the method to perform PCI within the same catheterization used to perform diagnostic imaging.

A method, device and system for acquiring blood vessel evaluation parameters based on an angiographic image are provided. The method includes: acquiring a real-time pressure P.sub.a at a coronary artery inlet in an angiographic state to obtaining a P.sub.a-t pressure waveform in time domain; subjecting a segment of blood vessel of interest in a two-dimensional angiographic image of the coronary artery in the angiographic state to three-dimensional modeling to obtain a three-dimensional grid model for the blood vessel; acquiring a real-time blood flow velocity v of the three-dimensional grid model for the blood vessel to obtain a v-t velocity waveform in the time domain; obtaining a ΔP-t pressure drop waveform in the time domain from the coronary artery inlet to a distal end of the coronary artery stenosis through Fourier transform and the inverse Fourier transform; acquiring the coronary artery blood vessel evaluation parameters in the angiographic state.

Embodiments of the present disclosure include a method, device and computer readable medium involving receiving image data of one or more coronary arteries, generating a binary segmentation indicating presence of calcium in the one or more coronary arteries from the image data, generating a branch density of the one or more coronary arteries, and assigning a coronary artery label from the branch density to the binary segmentation such that at least one indication of presence of calcium of the binary segmentation is labeled as present in a specific one of the one or more coronary arteries.

Detecting a pulmonary embolism (PE) in an image dataset of a blood vessel involves obtaining a volume of interest (VOI) in the blood vessel, generating a plurality of PE candidates within the VOI, generating a set of voxels for each PE candidate, estimating for each PE candidate an orientation of the blood vessel that contains the PE candidate, given the set of voxels for the PE candidate, and generating a visualization of the blood vessel that contains the PE candidate using the estimated orientation of the blood vessel that contains the PE candidate.

Provided are an ultrasound imaging apparatus and an operation method thereof for obtaining spectral Doppler pulse wave data at a plurality of points in a region of interest by using a multiline receiving technique, identifying a location and a direction of blood flow by using the obtained spectral Doppler pulse wave data, and automatically correcting an angle of a sample volume by using information about the identified location and direction of the blood flow.

Minimizing image sensor input/output pads in a pulsed laser mapping imaging system is disclosed. A system includes an emitter for emitting pulses of electromagnetic radiation and an image sensor comprising a pixel array for sensing reflected electromagnetic radiation. The system includes a plurality of bidirectional pads comprising an output state for issuing data and an input state for receiving data. The system includes a controller configured to synchronize timing of the emitter and the image sensor. The system is such that at least a portion of the pulses of electromagnetic radiation emitted by the emitter comprises a laser mapping pattern.

An inverse visualization of a time-resolved angiographic image data set of a vascular system of a patient that was recorded by a medical imager during the flow of a contrast medium through the vascular system is provided. The time-resolved angiographic image data set of the vascular system has a temporal sequence of frames of the vascular system corresponding to the contrast medium filling process. A data set from bolus arrival times for each pixel or voxel is determined. The bolus arrival time corresponds to the time in the temporal sequence at which a predetermined contrast enhancement due to the contrast medium filling first occurs. A data set of temporally inverted bolus arrival times with respect to the contrast medium filling is determined for each pixel or voxel, resulting in a temporally inverted sequence of frames with respect to the contrast medium filling. The time-resolved angiographic image data set in the temporally inverted sequence is visualized.

A computer-implemented method for providing a blood flow parameter set for a vascular malformation includes receiving time-resolved image data. The image data maps a change over time in a vessel section of an examination subject. The vessel section includes the vascular malformation. A time-resolved image of the vessel section is reconstructed from the image data. The vascular malformation is segmented in the image of the vessel section. An afferent and an efferent vessel are identified at the vascular malformation based on the image of the vessel section. An average blood flow velocity parameter and a vessel cross-sectional area parameter are determined for each of the afferent and the efferent vessel. The method includes determining and providing the blood flow parameter set for the vascular malformation based on the average blood flow velocity parameters and the vessel cross-sectional area parameters.

A remote photoplethysmography (RPPG) system for estimating vital signs of a person is provided. The RPPG system is configured to receive a set of imaging photoplethysmography (iPPG) signals measured from different regions of a skin of a person. The RPPG system is further configured to determine frequency coefficients at the frequency bins of the quantized frequency spectrum of the measured iPPG signals by minimizing a distance between the measured iPPG signals and corresponding iPPG signals reconstructed from the determined frequency coefficients, while enforcing joint sparsity of the determined frequency coefficients subject to the sparsity level constraint, such that the determined frequency coefficients of different iPPG signals have the non-zero values at the same frequency bins; and output one or a combination of the determined frequency coefficients, the iPPG signals reconstructed from the determined frequency coefficients, and a vital sign signal corresponding to the reconstructed iPPG signals.

Methods and systems suitable for obtaining information related to at least one of: respiration rate, heart rate, respiration rate variability, heart rate variability, temporal characteristics of at least a part of a heartbeat, temporal characteristics of at least a part of a respiration cycle, or a duration of a time interval of propagation of a blood pressure pulse from a first point or area or part of a body to a second point or area or part of the body, in a non-contact fashion.