Abstract: An apparatus for providing an ultrasonic sectional view stating the proportion of meat and lard in biological material. The apparatus comprises a transducer unit and an ultrasonic pulse generator providing a periodically scanning window. Said transducer unit comprises at least two multi-crystal units, the longitudinal axes of which may form a variable angle. The joint between the multi-crystal units comprises an angle information unit. By means of said angle information unit and the means for visualizing reflected ultrasonic echoes it is possible to visualize marginal surfaces.

Abstract: It has previously been suggested to indicate, or record images of, internal inhomogeneities in a sample by means of an ultrasonic angle probe which is moved on the surface of the sample, the reflected echo signal being indicated as punctiform position markings in such a way that when added together the markings form an image of the projection of the inhomogeneities on the surface of the sample. It is now suggested that also the amplitudes of the echo signals are indicated, whereby much more information about the inhomogeneities is obtained. The amplitude can be indicated as a variation of the intensity, size and/or duration of the position markings. Another possibility is to indicate the amplitude by the length of a line segment.

Abstract: Method and apparatus are disclosed in which it is possible by means of ultrasonic examination according to the pulse echo method to obtain an indication, or a recording of images, of internal inhomogeneities in otherwise homogeneous bodies, corresponding substantially to the images obtained by producing a normal radiographic film of the body. To obtain this an ultrasonic angle probe is moved across the surface of the body and the echo signals are used to produce punctiform markings on a recording surface in such a way that (a) the markings are effected along a moving axis of indication, (b) the displacement of a reference point on the axis of indication follows the displacement of the sound emission point of the probe, (c) the direction of the axis of indication follows the direction of the projection of the sound path on the surface of the body, and (d) the distance from the reference point to each marking is proportional to the echo time of the corresponding ultrasonic pulse.