Abstract: Disclosed is an NMR gated imaging apparatus in which an ultrasonic pulse signal is repeatedly transmitted toward the heart of a human body from an ultrasonic transducer to detect the position of the heart on the basis of the time of detection of a peak of an echo signal, and excitation and measurement of an NMR signal are executed only when a peak detector generates a detection output signal having a level included in a predetermined range. Thus, the NMR signal is repeatedly measured according to a programmable phase encoding amount at a limited phase of gated imaging.

Abstract: An ultrasonic probe comprising an acoustic lens (20) having a concave lens surface (21) formed on one side of a lens body, and a piezoelectric transducer (23) disposed on the other side of the acoustic lens, ultrasonic waves generated by applying voltage to the piezoelectric transducer being focused through the lens surface to detect the reflected waves of the ultrasonic waves from a sample (26) by the piezoelectric transducer for obtaining information about the surface or interior of the sample. The lens surface (21) of the acoustic lens (20) is defined by an etch profile (15) formed by etching a substrate material (11) which makes up the lens body.

Abstract: A method for examining a layer having defects and in particular the thickness of a machining damaged layer on a surface of a sample by means of a focused ultrasound beam and a device for realizing the method are disclosed, in which a focused ultrasound beam is generated and ultrasound reflected by the sample is detected. Curves (called V(z) curves) representing the relation of the distance between a transducer detecting the reflected ultrasound and the sample versus the detection output are traced while varying the distance and this measurement is repeated while varying the frequency of the focused ultrasound beam. The propagation velocity of surface acoustic wave in the sample is calculated on the basis of the period in each of the plurality of V(z) curves and a frequency dependence characteristic curve for the propagation velocity is obtained.

Abstract: An acoustic microscope wherein an ultrasonic beam is projected on a sample through a propagating medium by an ultrasonic transducer having a short focus, reflected acoustic waves from the sample are detected by the transducer, and a microscopic image of the sample is obtained by scanning the sample mechanically in two dimensions, comprises a cover member which is interposed between the sample and the propagating medium and which has an acoustic impedance higher than those of the two. The intensity of a reflection signal depends upon multipath reflection within the cover member, and an intense reflection signal is obtained even for a sample which differs slightly in the acoustic impedance from the propagating medium.

Abstract: An acoustic microscope of the type of mechanical scanning in which a single transducer works to generate an acoustic beam as well as to detect echoes reflected from the specimen. An echo reflected from an interface between an acoustic lens and an acoustic propagation medium is detected, and the detected intensity is used as a reference to display the distribution of attenuation factors of the specimen in a two-dimensional manner. Among the signals representing the distribution of attenuation factors of the specimen, furthermore, only those signals having intensities that lie within a predetermined range are displayed to obtain a picture of the specimen that represents the distribution of attenuation factors of a predetermined range only.

Abstract: A new food by lactic fermentation which has a good shape-maintaining property when squeezed from a squeezing tube at normal and lower temperatures is prepared by emulsifying an aqueous solution of non-fat milk solids and/or soybean proteins and fats to form an O/W type emulsion and subjecting said emulsion to lactic fermentation, the protein content of said O/W type emulsion is between 2 and 10% by weight, the fat content is between 20 and 40% by weight and the solid fat index of said fat is characterized as follows:6.about.30 at 5.degree. C., 3.about.20 at 15.degree. C., 1.about.10 at 25.degree. C. and difference between 5.degree. and 15.degree.0 C. being not more than 10, and difference between 15.degree. and 25.degree. C. being not more than 10.

Abstract: In an acoustic microscope wherein an acoustic wave is projected to a predetermined specimen by an acoustic lens, and a disturbed acoustic wave from the specimen is imaged; an acoustic microscope characterized in that the lens has a ring which is arranged around it, whereby a liquid to serve as an acoustic propagation medium is held between the ring and the specimen by capillarity.

Abstract: An acoustic microscope comprising an acoustic transducer which performs both generation and detection of acoustic wave beams, and a sample holding member which opposes to an acoustic wave transmitting and receiving surface of the transducer, to hold an object sample through an acoustic wave propagating medium and to offer behind the sample a layer of an acoustic impedance unequal to that of the sample, so that the sample holding member is moved in parallel, thereby to detect acoustic waves reflected from front and rear surfaces of the sample and acoustic waves reflected from a surface of the sample holding member without reaching the sample and to measure amplitudes and returning periods of time of the reflected acoustic waves, so as to measure the velocity of sound through the sample of unknown thickness, the acoustic impedance of the sample, etc. from the measured values.

Abstract: A multielement acoustic transducer comprising a metal plating which is formed by plating the convex surface of a low-melting metal having a plurality of convex semispherical holes and then fusing and removing the low-melting metal, the metal plating being used as a base electrode, a piezoelectric material which is formed on the base electrode, and a top electrode which is formed on the piezoelectric material, the piezoelectric material functioning as concave transducer elements.

Abstract: An ultrasonic microscope displays an ultrasonic wave image of a sample relatively and two-dimensionally scanned with respect to an ultrasonic wave beam transmitted from and focused by a transducer including a piezoelectric element and an acoustic lens. The F number of the acoustic lens is variably changeable while the scan in one direction of the two-dimensional scan is substituted by a time axis scan of the received echo.

Abstract: A method of image display of a specimen by an ultrasonic wave microscope comprising an acoustic wave propagating medium, a piezoelectric member provided at one end of said medium for generating an ultrasonic beam, and an acoustic wave lens formed at an opposite end of said acoustic wave propagating medium and having a predetermined focal point, said method comprising the steps of two-dimensionally scanning a specimen disposed substantially at said focal point by said ultrasonic beam while moving one of said specimen and said beam relative to the other, and applied to said specimen repetitive stress selectively during the scanning of said specimen.

Abstract: An acoustic scanning microscope includes a specimen table for supporting a specimen illuminated by an ultrasonic wave. The specimen table is supported in a non-contacting manner under aerostatic pressure or alternatively magnetic repulsion.

Abstract: An acoustic spherical lens where in a hemispherical hole is formed from a bubble which appears owing to the expansion of residual gases in a lens material employing silica, and the hemispherical hole is used as a lens surface.

Abstract: In an acoustic microscope wherein a piezoelectric transducer disposed on one face of an ultrasonic wave focusing lens radiates an ultrasonic wave into the lens and also converts into an electric signal a reflected wave from a specimen arranged on the side of the other face of the lens, a reflected wave from the interface of the lens and the reflected wave from the specimen are caused to interfere with each other.

Abstract: An ultrasonic imaging equipment employing a transducer which includes an acoustic propagating medium formed with a concave surface at one end thereof and formed with a piezoelectric thin film on the other end thereof opposing to the one end, and a medium arranged in the concave surface in order to permit the concave surface to effect a lens action, and a dummy transducer which eliminates a transmitted echo and an echo from the lens boundary and which is constructed of the acoustic propagating medium and an acoustic absorber.

Abstract: An acoustic spherical lens wherein a hemispherical hole is formed from a bubble which appears owing to the expansion of resudual gases in a lens material employing silica, and the hemispherical hole is used as a lens surface.

Abstract: In an ionization chamber type X-ray detector used in a computerized X-ray tomography device, non-insulative material such as semiconductive or conductive material is provided on each of paired electrode supporting plates for supporting anode and cathode electrodes, whereby the electrification of the electrode supporting plate may be prevented so that a signal current can be exactly and stably detected.

Abstract: A whipping cream is obtained using a partially enzymolyzed soybean protein, with which an aerosol container is filled up and CO.sub.2 gas as a propellant is charged under pressure into the container. When the partially enzymolyzed soybean protein is used in amounts of 1-6% by weight based on the cream, the whipping cream exhibits good emulsification state and has moderate overrun and a shape-maintaining property when extruded with CO.sub.2 gas.

Abstract: An ultrasonic transducer comprises an acoustic wave propagation medium, a piezoelectric element mounted on one surface of the propagation medium, and an ultrasonic lens formed in the opposite surface of the propagation medium and having a predetermined focal distance. The ultrasonic radiation generated from the piezoelectric element is propagated through the propagation medium and focused by the lens. The axial length of the propagation medium is selected to be 1/N (N: odd number) of a Fresnel focal distance.

Abstract: A stable semisolid egg yolk-free dressing is obtained by emulsifying an edible oil with an aqueous neutral solution of soybean protein, and lastly mixing vinegar therein.