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ii New Patents A system for the non-invasive inspection of a living organism utilizes two ultrasonic fields, one of which is produced by a perturbing beam trans- mitting transducer to perturb an internal region of tissue at a focal region which may be subject to movement. The second ultrasonic field consists of a set of ultrasonic beams, constituting a sense beam and reference beams, and which may be portions of a single beam or a plurality of separate beams and which are directed through and near the focal region of the perturbing field before and/or after perturbation. The time of flight differences of the sense beam and reference beams are detected by a plurality, preferably at least three, receiving transducers whose outputs are processed by a digital computer system, interacting with the signal analysis electronics, to derive information concerning the internal tissue of the living organism. The measurement is based upon time of flight differences ( phase dif- ferences for small-angle variances) of each beam which are the timed differences between the times of flight of coherent bursts of ultrasonic waves. 4432236 SIGNAL PROCESSING CIRCUIT OF ULTRASONIC DIAGNOSTIC APPARATUS Tatsuo Nagasaki, Tokyo, Japan assigned to Olympus Optica1 Co Ltd An echo signal irradiated from an ultrasonic scanner and reflected back from ; a subject under examination is amplified by a logarithm am- plifier and is amplitude-detected by a detector. An adder adds to the detected echo signal an STC voltage, a gain control voltage and a gain control feedback voltage. The gain-controlled echo signal from the adder is input to a multiplier and multiplied by a dynamic control voltage and a negative feedback gain control voltage. The negative feedback gain control voltage is ob- tained by integrating the output from the multi- plier and inverting and amplifying the obtained signal . 4433690 COMPACT ULTRASOUND APPARATUS FOR MEDICAL EXAMINATION Philip S Green, Jon C Taenzer assigned to Siemens AG The apparatus incorporates an ultrasonic wave- generating transducer for providing ultrasonic waves, a first and a second ultrasound window, a first guiding device for guiding the ultrasonic waves to the first window, an ultrasonic receiving transducer for transforming an ac- oustic image field received froti the second win- dow into electrical signals, and a second guiding device for guiding ultrasound transmitted through the second window to the receiving transducer. The ultrasound windows define an examination gap for insonifying a patient’s or- gan positioned therein. The apparatus further in- corporates a lens for focusing the acoustic image field received from the gap onto the receiving transducer. A mirror device, preferably a plane mirror, is associated with the second guiding device. This mirror deflects ultrasound energy that passes through the gap in a direction which is different from the main insonification direc- tion in the gap. The second guiding device may comprise a compact scanning means for sweeping the acoustic image field across the receiving transducer. 4433692 ULTRASONIC DIAGNOSIS DEVICE Kazuo PUS OP Baba, Tokyo, Japan assigned to Olym- Itical Co Ltd 25 1 17 Jo AI

4433690 Compact Ultrasound Apparatus for Medical Examination

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ii New Patents

A system for the non-invasive inspection of a living organism utilizes two ultrasonic fields, one of which is produced by a perturbing beam trans- mitting transducer to perturb an internal region of tissue at a focal region which may be subject to movement. The second ultrasonic field consists of a set of ultrasonic beams, constituting a sense beam and reference beams, and which may be portions of a single beam or a plurality of separate beams and which are directed through and near the focal region of the perturbing field before and/or after perturbation. The time of flight differences of the sense beam and reference beams are detected by a plurality, preferably at least three, receiving transducers whose outputs are processed by a digital computer system, interacting with the signal analysis electronics, to derive information concerning the internal tissue of the living organism. The measurement is based upon time of flight differences ( phase dif- ferences for small-angle variances) of each beam which are the timed differences between the times of flight of coherent bursts of ultrasonic waves.

4432236

SIGNAL PROCESSING CIRCUIT OF ULTRASONIC DIAGNOSTIC

APPARATUS

Tatsuo Nagasaki, Tokyo, Japan assigned to Olympus Optica1 Co Ltd

An echo signal irradiated from an ultrasonic scanner and reflected back from ; a subject under examination is amplified by a logarithm am- plifier and is amplitude-detected by a detector. An adder adds to the detected echo signal an STC voltage, a gain control voltage and a gain control feedback voltage. The gain-controlled echo signal from the adder is input to a multiplier and multiplied by a dynamic control voltage and a negative feedback gain control voltage. The negative feedback gain control voltage is ob- tained by integrating the output from the multi- plier and inverting and amplifying the obtained signal .

4433690

COMPACT ULTRASOUND APPARATUS FOR MEDICAL

EXAMINATION

Philip S Green, Jon C Taenzer assigned to Siemens AG

The apparatus incorporates an ultrasonic wave- generating transducer for providing ultrasonic waves, a first and a second ultrasound window, a first guiding device for guiding the ultrasonic waves to the first window, an ultrasonic receiving transducer for transforming an ac- oustic image field received froti the second win- dow into electrical signals, and a second guiding device for guiding ultrasound transmitted through the second window to the receiving transducer. The ultrasound windows define an examination gap for insonifying a patient’s or- gan positioned therein. The apparatus further in- corporates a lens for focusing the acoustic image field received from the gap onto the receiving transducer. A mirror device, preferably a plane mirror, is associated with the second guiding device. This mirror deflects ultrasound energy that passes through the gap in a direction which is different from the main insonification direc- tion in the gap. The second guiding device may comprise a compact scanning means for sweeping the acoustic image field across the receiving transducer.

4433692

ULTRASONIC DIAGNOSIS DEVICE

Kazuo PUS OP

Baba, Tokyo, Japan assigned to Olym- Itical Co Ltd

25 1 17 Jo AI