Thermoacoustic tomographic method and thermoacoustic tomograph
First Claim
Patent Images
1. A thermoacoustic tomographic method for imaging an object, which comprises:
- thermally exciting the object and causing acoustic waves to emanate from the object;
detecting the acoustic waves from the object, caused by the thermal excitation, from different directions of the object using at least one detector;
integrating the acoustic waves detected by the detector at least in one direction over a length of at least √
{square root over (8)}·
d, where d denotes a maximum distance from a point of the object to the detector; and
reconstructing an image of the object from the acoustic waves detected by the detector and positional information.
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Abstract
A thermoacoustic tomographic method for imaging an object, wherein the object is thermally excited by a source and the acoustic waves from the object, which are caused by the thermal excitation, from different directions of the object are detected using at least one detector and an image of the object is reconstructed from the detected acoustic waves and the positional information, wherein the acoustic waves detected by the detector are integrated at least in one direction over a length of at least √{square root over (8)}·d, where d denotes the maximum distance from a point of the object to be imaged to the detector.
47 Citations
30 Claims
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1. A thermoacoustic tomographic method for imaging an object, which comprises:
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thermally exciting the object and causing acoustic waves to emanate from the object;
detecting the acoustic waves from the object, caused by the thermal excitation, from different directions of the object using at least one detector;
integrating the acoustic waves detected by the detector at least in one direction over a length of at least √
{square root over (8)}·
d, where d denotes a maximum distance from a point of the object to the detector; and
reconstructing an image of the object from the acoustic waves detected by the detector and positional information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A thermoacoustic tomograph for imaging an object, comprising:
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at least one excitation source configured to thermally excite the object;
at least one detector for detecting acoustic waves caused by the object upon excitation thereof by said source, said at least one detector having at least one dimension with an extent of at least √
{square root over (8)}·
d, where d is a maximum distance from a point of the object to be imaged to said detector;
a movement device for moving the object and/or the at least one detector relative to one another; and
a device connected to said at least one detector for reconstructing an image of the object from the acoustic waves detected by the at least one detector in dependence on a respective position of the object. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification
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Current AssigneeResearch Center for Non Destructive Testing GmbH, Universitaet WIEN
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Original AssigneeUpper Austrian Research GmbH (Government of Austria), Universitat Innsbruck
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InventorsHaltmeier, Markus, Burgholzer, Peter, Scherzer, Otmar
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Granted Patent
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Time in Patent OfficeDays
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Field of Search
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US Class Current374/45
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CPC Class CodesG01N 2021/1725 Modulation of properties by...G01N 2021/1731 Temperature modulationG01N 2021/1772 Array detectorG01N 2021/1787 Tomographic, i.e. computeri...G01N 21/1702 with opto-acoustic detectio...G01N 2201/0697 Pulsed lasers
