METHOD OF FREQUENCY-DYNAMIC EMISSION AND RECEPTION FOCUSING IN MEDICAL ULTRASONIC DETECTION SCANNERS Russian patent published in 2009 - IPC A61B8/00 

FIELD: medicine.

SUBSTANCE: method includes: forming of emitted signal amplitude-phase front on aperture of multiple-unit wideband probe, for emission focusing on different depths of area under examination; dynamic aperture along with apodisation in emission and reception; dynamic focusing in reception; dynamic echo-signals filtration, subject to depth, in reception. During emission, single units of multiple-unit probe are excited by complex signals, each of them being composition of simple signals with frequency spectrums that lie within wave range of wideband probe. Signals are shifted relative each other so, that one of them corresponds to low frequencies, second is to medium frequencies, and third to high frequencies in the probe band. Amplitude-phase front of simple high-frequency signals is formed to focus on small depth, front of simple medium-frequency ones is formed to focus on medium depth, and front of simple low-frequency ones is formed to focus on big depth. In reception during dynamic focusing by depth, dynamic filtration is performed, extracting high-frequency signals on small depth, medium-frequency ones on medium depth, and low-frequency ones on big depth.

EFFECT: present invention allows emission and reception focusing in all depth range using one emission.

2 cl, 2 dwg