Abstract: Airflow changes in a subject's airway can be monitored and/or quantified using B-mode ultrasound, such as by computing respiratory parameter data from motion signals generated from B-mode signals. This monitoring may be performed before, during, or following a procedure, or may be used as a general patient monitoring tool. For example, signs of airway obstruction or respiratory compromise and/or failure during timeframes where patients have ongoing or residual sedation or anesthetics in their system can be monitored.

Abstract: Pressure and pressure or displacement variations are measured in a media, such as a fluid (e.g., air, other gases, or other liquid fluids), using ultrasound. The pressure may be sound pressure (e.g., acoustic pressure), pseudo-sound pressure (e.g., hydrodynamic pressure), displacement, and so on. By measuring pressure or displacement, the flow in the fluid can be measured, estimated, parameterized, or otherwise quantified. In this way, measurements of pressure (e.g., acoustic pressure, hydrodynamic pressure) or displacement can be correlated or otherwise converted into a measurement of flow. The pressure measurements can also be converted into audio signals that can be played back to a user.

Abstract: The present invention relates to a method and apparatus for clearly imaging samples such as fingerprints on substrates of forensic samples. The present invention overcomes the problems of the Laser-Induced-Fluorescence (LIF) technique to distinguish fluorescence from the sample from that of the substrate. The method of the present invention uses either a homodyne- or a heterodyne-assisted phase resolving method, or both, to suppress the contribution of the substrate fluorescence. The resulting image of the sample will then be sufficiently clear for forensic purposes. The present invention may also be used on histological and biochemical samples to visualise latent images.