Acoustic orthoscopic imaging system

• US 4,596,145 A
• Filed: 09/20/1983
• Issued: 06/24/1986
• Est. Priority Date: 09/20/1983
• Status: Expired due to Term

• Current Assignee: Koninklijke Philips N.V., Volumetrics Medical Imaging LLC
• Original Assignee: Olaf T Von Ramm, Stephen Smith
• Inventors: Smith, Stephen W., von Ramm, Olaf T.
• Primary Examiner(s): Ciarlante, Anthony V.
• Application Number:
  US06/533,956
• Time in Patent Office: 1,008 Days
• Field of Search: 73/626, 73/607, 73/606, 73/620, 128/660
• US Class Current: 73/626
• CPC Class Codes: G01S 7/52061 Plan position indication (PPI display); C-scan display
• CPC Class Codes: G01S 7/52071 Multicolour displays; using colour coding; Optimising colour or information content in displays, e.g. parametric imaging
• CPC Class Codes: G01S 7/6263 in which different colours are used

Abstract

An acoustic imaging system capable of producing C-mode images or orthoscopic projection images of a three-dimensional volume at significantly increased speeds of operation is described. For each acoustic pulse transmitted by a piezoelectric transducer array an electronic parallel processing system produces several unique image points whose locations in the image correspond to the Cartesian coordinates of the positions of receiving transducers. While range information is not directly displayed, range discrimination can be realized by means of an optional range dependent gain control or an optional color display in which range discrimination occurs through visual discrimination of differing hues.

Claims

1. An improved acoustic imaging system comprising:

transducer means for producing two-dimensional acoustic imaging data from a planar section of an object which planar section is parallel to the effective transducer aperture,

parallel processing means for receiving pulse-echo data from said transducer means and for simultaneously producing a plurality of image data related to a plurality of image locations, and

means for providing a visual display from said image data.

3. The improved acoustic imaging system defined in claim 1 or 2 wherein said transducer means comprises an array of a plurality of acoustic transducers, and further comprising:

means for triggering predetermined ones of said transducers in said array to produce transmitted acoustic pulse signals and to receive acoustic pulse signals reflected from an object being viewed.

4. The improved acoustic imaging system defined in claim 3 further comprising:

means for receiving said reflected acoustic pulse signals from said triggered transducers and for terminating receiving when said reflected acoustic pulse signals are determined to have been reflected from a predetermined maximum range.

5. The improved acoustic pulse-echo imaging system defined in claim 1 or 2 wherein said parallel processing means comprises a number of individual parallel processing channels for producing an equal number of individual image data corresponding to an equal number of image locations from each acoustic pulse signal transmitted and received by said array.

6. The improved acoustic imaging system defined in claim 5 wherein said transducer means comprises an array of a plurality of acoustic transducers, and further comprising:

means for triggering predetermined ones of said transducers in said array for emitting acoustic pulse signals and receiving ones of said emitted acoustic pulse signals reflected from an object being viewed.

7. The improved acoustic imaging system defined in claim 6 further comprising:

means for receiving said reflected acoustic pulse signals from said triggered transducers and for terminating receiving when reflected acoustic pulse signals are determined to have been reflected from a predetermined maximum range.

8. The improved acoustic imaging system defined in claim 1 or 2 further comprising:

means for encoding said image data with varying color data, said color data being varied in relation to the distance from which said pulse-echo data forming said image data is received, whereby said color data provides for range discrimination when visually displayed.

9. The improved acoustic imaging system defined in claim 1 or 2 further comprising:

weighting means for varying the amplitude of said image data in relation to the distance from which said pulse-echo data forming said image data is received, said weighted amplitude image data being applied to Z-axis driving means of said visual display.

2. An improved acoustic imaging system comprising:

transducer means for producing two-dimensional acoustic imaging data from a non-planar surface of an object,

parallel processing means for receiving pulse-echo data from said transducer means and for simultaneously producing a plurality of image data related to a plurality of image locations, and

means for providing a visual display from said image data.

10. An improved acoustic imaging system comprising:

transducer means for producing three-dimensional acoustic imaging data,

parallel processing means for receiving pulse-echo data from said transducer means and for simultaneously producing a plurality image data related to a plurality of image locations, and

means for providing a visual display from said image data.

11. In an acoustic imaging system displaying at least two dimensions of an object being viewed including a transducer means for transmitting radiated energy signals and for receiving said radiated energy signals reflected from a target, means for producing image data from said received radiated energy signals and means for providing a visual display of said image data, the improvement comprising:

means for encoding said image data with varying color data, said color data being varied in relation to the distance from which said received radiated energy signals are received, whereby said color data provides for range discrimination when visually displayed.

12. In an acoustic imaging system displaying at least two dimensions of an object being viewed including transducer means for transmitting acoustic signals and for receiving acoustic signals reflected from a target, means for producing image data from said received acoustic signals and means for providing a visual display of said image data, the improvement comprising:

weighting means for varying the amplitude of said image data in relation to the distance from which said received acoustic signals forming said image data are received, said weighted amplitude image data being applied to Z-axis driving means of said visual display.