Sensor module with adaptive backing layer

1. A scanning apparatus comprising:

a receiver circuit and a transmitter circuit, both circuits being flexible such that they are capable of conforming to the surface contours of an object as a surface of the apparatus is pressed against it; and

an adaptive backing positioned behind the transmitter and receiver circuits in the scanning apparatus and configured to, as the scanning apparatus is pressed against the object, conform to the flexible circuits.

2. A scanning apparatus as claimed in claim 1 , comprising a dry coupling that is positioned in front of the transmitter and receiver circuit in the scanning apparatus.

3. A scanning apparatus as claimed in claim 2 , the dry coupling being configured to act as a transmission medium for conducting scanning signals into the object.

4. A scanning apparatus as claimed in claim 2 , the dry coupling forming the surface of the scanning apparatus.

5. A scanning apparatus as claimed in claim 2 , the dry coupling being flexible such that, when the surface of the scanning apparatus is pressed against an object to be scanned, the dry coupling adapts to the surface contours of the object.

6. A scanning apparatus as claimed in claim 2 , the flexible circuits being configured to adapt to the surface contours of the object by flexing in conformity with the dry coupling as the dry coupling adapts to the surface contours of the object.

7. A scanning apparatus as claimed in claim 2 , the flexible circuits being configured to flex inwardly in conformity with any inward deflection of the dry coupling into the scanning apparatus.

8. A scanning apparatus as claimed in claim 1 , the adaptive backing being compressible.

9. A scanning apparatus as claimed in claim 1 , comprising a relatively rigid surface positioned behind the adaptive backing in the scanning apparatus, the adaptive backing being configured to adapt to the shape of the flexible circuits by compressing against the rigid surface to accommodate any flexing of the flexible circuits.

10. A scanning apparatus as claimed in claim 2 , the dry coupling being less compressible than the adaptive backing.

11. A scanning apparatus as claimed in claim 9 , comprising a rigid frame configured to hold the flexible circuits between a dry coupling and the adaptive backing.

12. A scanning apparatus as claimed in claim 11 , the rear of the rigid frame forming the rigid surface against which the adaptive backing is compressed.

13. A scanning apparatus as claimed in claim 11 , the front of the rigid frame being open such that the dry coupling forms the surface of the scanning apparatus.

14. A scanning apparatus as claimed in claim 1 , the transmitter circuit and the receiver circuit being respectively configured to transmit and receive ultrasound signals.

15. A scanning apparatus as claimed in claim 1 , the transmitter and receiver circuits being configured to act as an ultrasound transducer.

16. A scanning apparatus as claimed in claim 1 , the scanning apparatus being configured to scan the object by transmitting ultrasound signals at the object and receiving reflections of those ultrasound signals from the object, the adaptive backing being configured to absorb substantially all of the reflected signals that reach it.

17. A scanning apparatus as claimed in claim 1 , the receiver circuit and the transmitter circuit having a non-planar shape in a non-deformed state.

18. A method of scanning an object using a scanning apparatus, the scanning apparatus comprising a receiver circuit and a transmitter circuit, both circuits being flexible; and an adaptive backing positioned behind the transmitter and receiver circuits in the scanning apparatus, the method comprising:

pressing a surface of the scanning apparatus against the object such that the receiver circuit and the transmitter circuit conform to surface contours of the object; and such that the adaptive backing conforms to the flexible circuits as the scanning apparatus is pressed against the object.