Breast scanning system

• US 8,366,617 B2
• Filed: 05/14/2008
• Issued: 02/05/2013
• Est. Priority Date: 05/15/2007
• Status: Active Grant

• Current Assignee: QT Imaging Incorporated
• Original Assignee: CVUS Clinical Trials, LLC
• Inventors: Johnson, Steven A., Berggren, Michael J., Borup, David T., Hanover, Barry K., Wiskin, James W., Pattee, Jeff
• Primary Examiner(s): Cattungal, Sanjay
• Application Number:
  US12/152,631
• Publication Number:
  US 20080319318A1
• Time in Patent Office: 1,728 Days
• Field of Search: 600437-469
• US Class Current: 600/437
• CPC Class Codes: A61B 8/0825 for diagnosis of the breast, e.g. mammography
• CPC Class Codes: A61B 8/15 Transmission-tomography
• CPC Class Codes: A61B 8/4477 using several separate ultrasound transducers or probes
• CPC Class Codes: A61B 8/4483 characterised by features of the ultrasound transducer
• CPC Class Codes: A61B 8/58 Testing, adjusting or calibrating the diagnostic device
• CPC Class Codes: G01S 15/8977 using special techniques for image reconstruction, e.g. FFT, geometrical transformations, spatial deconvolution, time deconvolution
• CPC Class Codes: G01S 7/52036 using analysis of echo signal for target characterisation

Abstract

A breast scanning system configured to scan a breast of a patient includes a table configured to receive the patient thereon. The table has an aperture formed therein configured to receive the breast of the patient pendant therethrough and positionable over and into a bath configured to contain a medium. An armature is movably disposable in the bath. The armature carries transducer arrays that are disposable in the bath, and configured to transmit and receive acoustic and/or ultrasound signals. A manual control is operatively coupled to the armature to manually move the armature and thus the transducer arrays within the bath.

Claims

1. A breast scanning system configured to scan a breast of a patient, comprising:

a) a transmitter array configured to transmit acoustic signals through the breast;

b) a receiver array positioned to receive acoustic signals from the transmitter array to obtain transmission attenuation data;

c) a reflection array disposed laterally between the transmitter array and the receiver array, and configured to transmit acoustic signals through the breast and receive reflected acoustic signals from the breast to obtain reflection data from the breast;

d) a table configured to receive the patient thereon, having an aperture formed therein configured to receive the breast of the patient pendant therethrough and positionable over and into a bath configured to contain a medium; and

e) an armature movably disposable in the bath and configured to carry the arrays.

2. A system in accordance with claim 1, further comprising:

an acoustic absorber disposed opposite the reflection array to absorb acoustic signals from the reflection array.

3. A system in accordance with claim 1, further comprising:

means for combining transmission speed of sound and/or attenuation data from the receiver array and reflection data from the reflection array into an image of the breast of the patient.

4. A system in accordance with claim 1, wherein the reflection array includes at least two sub-reflection arrays and each sub-reflection array is shaped to provide a different beam shape and focal point to the acoustic signal.

5. A system in accordance with claim 1, wherein the transmitter array and the receiver array are arcuate in a horizontal plane and have a curvature within a common plane.

6. A system in accordance with claim 1, wherein the transmitter array and the receiver array are sparse arrays with transducer elements that do not fully populate the arrays leaving greater spacing between the transducer elements.

7. A system in accordance with claim 1, wherein the transmitter array is a convex arcuate transmitter array.

8. A system in accordance with claim 1, wherein the transmitter array includes a plurality of rows oriented convergent to one another to define a transmitter array with a concave curvature.

9. A system in accordance with claim 1, wherein the transmitter array is laterally variable across the transmitter array with respect to strength of an acoustic signal transmitted from the transmitter array to provide relatively less energy in the acoustic signal at a desired area of the transmitter array.

10. A system in accordance with claim 1, wherein at least one of the transmission array and the receiver array has a non-rectangular configuration selected from the group consisting of an L-shaped array, an inverted L-shaped array, a T-shaped array, an inverted T-shaped array, a sideways T-shaped array, a V-shaped array, an inverted V-shaped array, a sideways V-shaped array, an X-shaped array, a U-shaped array, an inverted U-shaped array, a sideways U-shaped array, an H-shaped array, a sideways H-shaped array, a circular O-shaped array, a block O-shaped array, an I-shaped array, a sideways I-shaped array, a filled U-shaped array, a filled V-shaped array, and combinations thereof.

11. A system in accordance with claim 10, wherein the at least one array includes a greater number of transducer elements at a higher elevational location and a lesser number of transducer elements at a lower elevational location.

12. A system in accordance with claim 1, wherein the transmitter array and the receiver array are disposed opposing one another and are pivotal about a horizontal pivot axis to direct the acoustic signals at an incline with respect to the breast of the patient.

13. A system in accordance with claim 12, wherein the transmitter array includes a plurality of rows of elements with an uppermost row facing downwardly at an incline, and the receiver array includes a plurality of rows of elements with a lowermost row facing upwardly at an incline opposing the uppermost row of the transmitter array.

14. A system in accordance with claim 1, wherein the transmitter array and the receiver array are rotatable with respect to each other about a vertical axis.

15. A system in accordance with claim 1, wherein the transmitter array is electronically steerable about a pivot axis to pivot with respect to the receiver array, and the receiver array is electronically steerable about a pivot axis to pivot with respect to the receiver array.

16. A system in accordance with claim 15, wherein arrays are steerable with delays so as to emit acoustic pulses sequentially laterally and vertically across the array.

17. A system in accordance with claim 1, further comprising means for extending breast tissue to draw the breast tissue away from a wall of a chest of the patient to allow acoustic signals from the arrays to pass through the extended breast tissue.

18. A system in accordance with claim 1, wherein the reflection array is separate and discrete from the transmitter array and the receiver array.

19. A system in accordance with claim 1, wherein the reflection array is carried by an armature.

20. A system in accordance with claim 1, further comprising a yoke with pair of vertical arms carrying the transmitter and receiver arrays, and a third vertical arm carrying the reflection array.

21. A breast scanning system configured to scan a breast of a patient, comprising:

a) a table configured to receive the patient thereon, having an aperture formed therein configured to receive the breast of the patient pendant therethrough and positionable over and into a bath configured to contain a medium;

b) an armature movably disposable in the bath and configured to carry the arrays;

c) transducer arrays disposable in the bath, and including a transmitter array configured to transmit acoustic signals through the breast, and a receiver array configured receive acoustic signals to obtain transmission attenuation data from the breast; and

d) a reflection array to transmit acoustic signals through the breast and receive reflected acoustic waves from the breast to obtain reflection data from the breast.

22. A system in accordance with claim 21, further comprising:

a) a friction surface surrounding the aperture and having a relatively higher friction coefficient than the table to resist movement of the breast of the patient out of the aperture.

23. A system in accordance with claim 21, further comprising:

a) a seal disposed between the bath and the table to seal the table to the bath when the table is positioned against the bath;

b) a seal surface surrounding the aperture and positioned to seal against skin of a chest wall of the patient when the patient lies upon the table; and

c) a vacuum fluidly coupled to the bath and configured to draw a vacuum pressure on the bath to draw the breast of the patient into the bath.

24. A breast scanning system configured to scan a breast of a patient, comprising:

a) transducer arrays disposable in a bath, and including a transmitter array configured to transmit acoustic signals through the breast, and a receiver array configured receive acoustic signals to obtain transmission attenuation data from the breast;

b) a reflection array to transmit acoustic signals through the breast and receive reflected acoustic waves from the breast to obtain reflection data from the breast;

c) means for combining the transmission attenuation data from the transducer arrays and reflection data from the reflection array into an image of the breast of the patient;

e) a table configured to receive the patient thereon, having an aperture formed therein configured to receive the breast of the patient pendant therethrough and positionable over and into a bath configured to contain a medium; and

e) an armature movably disposable in the bath and configured to carry the arrays.