Dynamic Spect Camera

• US 20090152471A1
• Filed: 11/09/2006
• Published: 06/18/2009
• Est. Priority Date: 11/09/2005
• Status: Active Grant

• Current Assignee: Spectrum Dynamics Medical Ltd
• Original Assignee: Spectrum Dynamics LLC
• Inventors: Rousso, Benny, Ben-Haim, Shlomo, Nagler, Michael, Ziv, Omer
• Granted Patent: US 7,705,316 B2
• Time in Patent Office: Days
• US Class Current: 250/363.40
• CPC Class Codes: A61B 6/037 Emission tomography
• CPC Class Codes: G01T 1/161 Applications in the field of nuclear medicine, e.g. in vivo counting apparatus for radiation diagnosis A61B6/00
• CPC Class Codes: G01T 1/166 involving relative movement between detector and subject scanners in general without using scintigraphy G01T1/2964
• CPC Class Codes: G01T 1/2985 In depth localisation, e.g. using positron emitters; Tomographic imaging (longitudinal and transverse section imaging; apparatus for radiation diagnosis sequentially in different planes, steroscopic radiation diagnosis); using external radiation sources A61B6/02

Abstract

A dynamic SPECT camera is provided, comprising, a plurality of single-pixel detectors, a timing mechanism, in communication with each single-pixel detector, configured for enabling time-binning of the radioactive emissions impinging upon each single-pixel detector to time periods not greater than substantially 30 seconds, and a position-tracker, configured for providing information on the position and orientation of each detecting unit, with respect to the overall structure, substantially at all times, during the individual motion, the dynamic SPECT camera being configured for acquiring a tomographic reconstruction image of a region of interest of about 15×15×15 cubic centimeters, during an acquisition time of 30 seconds, at a spatial resolution of at least 10×10×10 cubic millimeter. The dynamic camera is configured for very short damping time, and may further acquire images in a stationary mode, with no motion. It is further configured for time binning at dynamically varying time-bin lengths, dynamically determining a spectral energy bin for each detecting unit, and employing an anatomic construction of voxels in the imaging and reconstruction.

Claims

1. A dynamic SPECT camera, comprising:

an overall structure, which defines proximal and distal ends with respect to a body;

a first plurality of assemblies, arranged on the overall structure, forming an array of the assemblies, each assembly comprising;

a second plurality of detecting units, each detecting unit including;

a detector, for detecting radioactive emissions; and

a collimator, attached to the detector, at the proximal end thereof, for defining a solid collection angle δ

for the detecting unit; and

an assembly motion provider, configured for providing the assembly with individual assembly motion with respect to the overall structure, during the acquisition of radioactive-emission data for a tomographic image;

a timing mechanism, in communication with each detector, configured for enabling time-binning of the radioactive emissions impinging upon each detector to time periods not greater than substantially 30 seconds; and

a position-tracker, configured for providing information on the position and orientation of each detecting unit, with respect to the overall structure, substantially at all times, during the individual motion,

the dynamic SPECT camera being configured for acquiring a tomographic reconstruction image of a region of interest of at least 15×

15×

15 cubic centimeters, during an acquisition time of 300 seconds or less, at a spatial resolution of at least 10×

10×

10 cubic millimeter or smaller voxel size.

2. The dynamic SPECT camera of claim 1, and further including a control unit.

4. The dynamic SPECT camera of claim 1, further configured for acquiring a tomographic reconstruction image of a region of interest of at least about 15×

15×

15 cubic centimeters, during an acquisition time of 100 seconds or less, at a spatial resolution of at least 10×

10×

10 cubic millimeter or smaller voxel size.

6. The dynamic SPECT camera of claim 1, further configured for acquiring a tomographic reconstruction image of a region of interest of at least about 15×

15×

15 cubic centimeters, during an acquisition time of 30 seconds or less, at a spatial resolution of at least 10×

10×

10 cubic millimeter or smaller voxel size.

9. The dynamic SPECT camera of claim 1, further configured for acquiring a tomographic reconstruction image of a region of interest of at least about 15×

15×

15 cubic centimeters, during an acquisition time of 5 seconds or less, at a spatial resolution of at least 10×

10×

10 cubic millimeter or smaller voxel size.

10. The dynamic SPECT camera of claim 1, further configured for acquiring a tomographic reconstruction image of a region of interest of at least about 15×

15×

15 cubic centimeters, during an acquisition time of 1 seconds or less, at a spatial resolution of at least 10×

10×

10 cubic millimeter or smaller voxel size.

11. The dynamic SPECT camera of claim 1, further configured for acquiring a series of tomographic reconstruction images of a region of interest of at least about 15×

15×

15 cubic centimeters, as a function of time, at a rate of at least a tomographic reconstruction image every 300 seconds, at a spatial resolution of at least 10×

10×

10 cubic millimeter or smaller voxel size.

15. The dynamic SPECT camera of claim 1, further configured for acquiring a series of tomographic reconstruction images of a region of interest of at least about 15×

15×

15 cubic centimeters, as a function of time, at a rate of at least a tomographic reconstruction image every 30 seconds, at a spatial resolution of at least 10×

10×

10 cubic millimeter or smaller voxel size.

17. The dynamic SPECT camera of claim 1, further configured for acquiring a series of tomographic reconstruction images of a region of interest of at least about 15×

15×

15 cubic centimeters, as a function of time, at a rate of at least a tomographic reconstruction image every 5 seconds, at a spatial resolution of at least 10×

10×

10 cubic millimeter or smaller voxel size.

18. The dynamic SPECT camera of claim 1, further configured for acquiring a series of tomographic reconstruction images of a region of interest of at least about 15×

15×

15 cubic centimeters, as a function of time, at a rate of at least a tomographic reconstruction image every 1 seconds, at a spatial resolution of at least 10×

10×

10 cubic millimeter or smaller voxel size.

22. The dynamic SPECT camera of claim 1, wherein the timing mechanism includes time stamping at an accuracy of 1 second.

23. The dynamic SPECT camera of claim 1, wherein the timing mechanism includes time stamping at an accuracy of 0.1 second.

25. The dynamic SPECT camera of claim 1, wherein the timing mechanism includes time stamping at an accuracy of 0.01 seconds.

27. The dynamic SPECT camera of claim 1, wherein the timing mechanism includes time binning to time bins of 1 second.

28. The dynamic SPECT camera of claim 1, wherein the timing mechanism includes time binning to time bins of 0.1 second.

30. The dynamic SPECT camera of claim 1, wherein the timing mechanism includes time binning to time bins of 0.01 seconds.

32. The dynamic SPECT camera of claim 1, and further including cardiac gating, at gated periods of substantially 50 milliseconds or shorter.

33. The dynamic SPECT camera of claim 1, employing an open collimator design, of a solid collection angle of at least 0.005 steradians, and configured for maintaining the spatial resolution, by motion in a stop and shoot acquisition mode, at very small incremental steps, of between about 0.01 degrees and about 0.75 degrees.

34. The dynamic SPECT camera of claim 1, employing an open collimator design, of a solid collection angle of at least 0.005 steradians, and configured for maintaining the spatial resolution, by a combination of:

motion in a stop and shoot acquisition mode, at very small incremental steps, of between about 0.01 degrees and about 0.75 degrees; and

simultaneous acquisition by the first plurality of the assemblies, each scanning the same region of interest from a different viewing position, thus achieving both shorter acquisition time and better edge definitions.

35. The dynamic SPECT camera of claim 1, employing an open collimator design, of a solid collection angle of at least 0.005 steradians, and configured for maintaining the spatial resolution, by a combination of:

motion in a stop and shoot acquisition mode, at very small incremental steps, of between about 0.01 degrees and about 0.75 degrees;

simultaneous acquisition by the first plurality of the assemblies, each scanning the same region of interest from a different viewing position, thus achieving both shorter acquisition time and better edge definitions; and

a structure that conforms to the body contours, for acquisition with substantial contact with the body.

36. The dynamic SPECT camera of claim 1,

configured for simultaneous acquisition by the first plurality of the assemblies, each scanning the same region of interest from a different viewing position.

37. The dynamic SPECT camera of claim 1, wherein the individual assembly motion with respect to the overall structure is one or both of an oscillatory sweeping motion and an oscillatory lateral motion.

40. The dynamic SPECT camera of claim 37, and further including an overall array oscillatory lateral motion in at least one direction.

42. The dynamic SPECT camera of claim 37, wherein the detecting untis are grouped in blocks, and further including an individual block oscillatory sweeping motion, of the blocks in at least one of the assemblies, with respect to the assembly associated with the blocks, the individual block oscillatory sweeping motion being orthogonal to the individual assembly oscillatory sweeping motion, thus providing cross views.

47. The dynamic SPECT camera of claim 1, wherein the assemblies in the array are configured to provide stereo views in a plane and cross views.

48. The dynamic SPECT camera of claim 1, configured for automatically receiving a precise time of radiopharmaceutical administration.

52. The dynamic SPECT camera of claim 1, configured for one or both of a continuous acquisition mode and a stop and shoot acquisition mode.

54. The dynamic SPECT camera of claim 52, wherein each assembly is configured for a short damping time of less than 5 second.

56. The dynamic SPECT camera of claim 52, configured for interlacing acquisition mode.

58. The dynamic SPECT camera of claim 1, configured for stationary prescanning.

59. The dynamic SPECT camera of claim 1, and further including an electrical scheme for minimal saturation and for fast throughput.

60. The dynamic SPECT camera of claim 1, and further including active vision.

61. The dynamic SPECT camera of claim 1, and further including non-uniform voxel definition.

62. The dynamic SPECT camera of claim 1, and further including anatomic voxel definition.

64. The dynamic SPECT camera of claim 1, configured for cardiac perfusion studies.

65. The dynamic SPECT camera of claim 1, configured for brain perfusion studies.

66. The dynamic SPECT camera of claim 1, configured for kidney perfusion studies.

67. The dynamic SPECT camera of claim 1, configured for stomach perfusion studies.

68. The dynamic SPECT camera of claim 1, configured for tumor perfusion studies.

69. The dynamic SPECT camera of claim 1, configured for acquiring a “

clinically-valuable image.”

70. The dynamic SPECT camera of claim 1, configured for time binning at dynamically varying time-bin lengths.

71. The dynamic SPECT camera of claim 1, configured for dynamically determining a spectral energy bin for each detecting unit.

72. The dynamic SPECT camera of claim 1, and further including employing an anatomic construction of voxels in the imaging and the reconstruction.

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73. An intracorporeal dynamic SPECT camera, comprising:

an overall structure, adapted for intracorporeal insertion through a body lumen;

an assembly, arranged along a length of the overall structure, the assembly comprising;

a plurality of detecting units, each detecting unit including;

a detector, for detecting radioactive emissions; and

a collimator, attached to the detector, at the proximal end thereof, with respect to a region of interest, for defining a solid collection angle δ

for the detecting unit; and

a motion provider, configured for providing motion with respect to the overall structure, during the acquisition of radioactive-emission data for a tomographic image;

a timing mechanism, in communication with each detector, configured for enabling time-binning of the radioactive emissions impinging upon each detector to time periods not greater than substantially 30 seconds; and

a position-tracker, configured for providing information on the position and orientation of each detecting unit, with respect to the overall structure, substantially at all times, during the individual motion,

the intracorporeal dynamic SPECT camera being configured for acquiring a tomographic reconstruction image of the region of interest of at least about 10×

10×

10 cubic centimeters, during an acquisition time of 30 seconds or less, at a spatial resolution of at least 10×

10×

10 cubic millimeter or smaller voxel size.

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104. A dynamic SPECT camera, configured for time binning at dynamically varying time-bin lengths, the camera comprising:

an overall structure, which defines proximal and distal ends with respect to a body;

a detecting unit, arranged on the overall structure and configured for detecting radioactive emissions from the body, using a plurality of detectors;

a timing mechanism, in communication with the detecting unit, configured for enabling time-binning of the radioactive emissions impinging upon the detecting unit, to time bins of the dynamically varying time-bin lengths;

a lookup system of recommended time-bin lengths, as functions of at least one of a specific region of interest, an administered radiopharmaceutical, time since the administration of the radiopharmaceutical, cardiac state with respect to an RR cycle, a view of the detecting unit with respect to the region of interest, and data acquisition mode,

wherein the timing mechanism is configured for selecting a recommended time-bin length from the lookup system, for each time bin, for each detector of said plurality of detectors.

105. The dynamic SPECT camera of claim 104, and further including:

a first plurality of assemblies, arranged on the overall structure, forming an array of assemblies, each assembly comprising;

a second plurality of the detecting units, each of the detecting units including;

a detector, for detecting radioactive emissions; and

a collimator, attached to the detector, at the proximal end thereof, for defining a solid collection angle δ

for the detecting unit; and

an assembly motion provider, configured for providing the assembly with individual assembly motion with respect to the overall structure, during the acquisition of radioactive-emission data for a tomographic image.

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131. A method of dynamic SPECT data acquisition using a plurality of detectors, comprising:

providing a timing mechanism, in communication with each detector for enabling time-binning of radioactive emissions impinging upon each detector of a SPECT camera to time periods not greater than substantially 30 seconds; and

providing information on the position and orientation of each detector of the SPECT camera, with respect to the overall structure, substantially at all times, during the image acquisition; and

acquiring a tomographic reconstruction image of a region of interest of at least about 15×

15×

15 cubic centimeters, during an acquisition time of about 30 seconds or less, at a spatial resolution of at least 10×

10×

10 cubic millimeter, or smaller voxel size.

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