Agile Ultrasound Modulated Optical Tomography Techniques using Smart FiberOptics

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Agile Ultrasound Modulated Optical Tomography
Techniques using Smart Fiber-Optics
Nabeel A. Riza
Photonic Information Processing Systems (PIPS)
Laboratory The School of Optics and Center for
Research and Education in Optics and Lasers
(CREOL) University of Central Florida Orlando, FL
Presented at SPIE BIOS Conference, San Jose, Jan.
2004.
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Futuristic Medical Center Using Fiber-Optic and
Photonic Technology
N. A. Riza, Photonically controlled ultrasonic
arrays scenarios and systems, IEEE Ultrasonics
Symposium, IEEE Catalog No. 96CH35993, Vol. 2,
pp. 1545-1550, Nov. 1996.
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Optics and Biomedical Imaging Probes
N. A. Riza, Photonically controlled ultrasonic
arrays scenarios and systems, IEEE Ultrasonics
Symposium, IEEE Catalog No. 96CH35993, Vol. 2,
pp. 1545-1550, Nov. 1996.
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Concept of Ultra-compact Medical Probe using
Broadband Wavelength Mapping
N. A. Riza, Photonically controlled ultrasonic
arrays scenarios and systems, IEEE Ultrasonics
Symposium, IEEE Catalog No. 96CH35993, Vol. 2,
pp. 1545-1550, Nov. 1996. N. A. Riza,
Photonically controlled ultrasonic probes, US
Patent 5718226, Feb 17, 1998.
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Agile Wavelength Manipulations for Optical
Scanner Applications
N. A. Riza and Yu Huang, High speed optical
scanner for multi-dimensional beam pointing and
acquisition , IEEE LEOS Annual Meeting, Vol. 1,
pp. 184-185, 1999.
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Broadband versus Agile Wavelength Mapping A
Comparison!
Agile
Broadband

• Power Efficient
• Independent Beam Generation
• Intelligent Cross-talk Control
• Requires Electronic Control

• Power Limited
• Simultaneous Multiple Beams
• Spot Size and Cross-talk Limited
• No Electronic Control Required

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Smart Non-Coherent Internal and External Cavity
Scanning Probe System
Broadband Optical Circulator
l
Scanning probe Tip
.
SMF
.
Tunable Laser
.
. . .
OA
VOA
PC
OA
PD
Scan Angle Control Signal
i(t)
Features - Agile Spectral Shaping Applications
- Reflectance-based Scanning Imager-
High-speed Precision Cutting Knife
SMF Single Mode FiberOA Optical AmplifierVOA
Variable Optical AttenuatorPD PhotodetectorPC
Polarization Controller
N. A. Riza and Z. Yaqoob, High-speed fiber-optic
probe for dynamic blood analysis measurements,
European Biomedical Week Progress in Biomedical
Optics and Imaging, SPIE Proc. Vol. 4163, pp.
18-23, Amsterdam, August 2000.
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High Speed Ultrasound Modulated Optical
Tomography System
No-moving Parts Optical Scanner Combined
with No-moving Parts Phased Array Ultrasound
Allows Fast Optical Tracking of Wide Band Steered
Ultrasound
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Fiber-coupled Agile Internal/Intracavity Mode
Operations Ultrasound Modulated Optical
Tomography System

• Single Frontend Module Has
• Two Scan Tips
• Generates Scanned Ultrasound
• Generates Scanned Optical Beam

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Demo Probe for External Cavity Applications
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3
1
5
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Dimensions (inches) 6 3 3
1 Tip Tilt Stage2 Grating Mount3 Fiber
Collimator4 Single Mode Fiber5 Base Plate
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Angular Scan Range and Insertion Loss of
Free-SpaceW-MOS Using Blazed Reflection Grating
qinc 2.207oL 1/600 mm
Loss Variation 4.34 dB
Start Scan 71.9oEnd Scan 86.87oTotal
Angular Scan 14.99o
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Angular Scan Range of an In-line Free-Space W-MOS
Versus Wavelength of Tunable Laser
Estimated Total Angular Scan 13.39o Measured
Total Angular Scan 13.42o
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Two-Dimensional Free-Space W-MOS Using Bragg
Gratings in Photothermorefractive Glass
Z. Yaqoob, M. A. Arain, and N. A. Riza,
High-speed two-dimensional laser scanner based
on Bragg gratings stored in Photothermorefractive
glass, Applied Optics, 42(26), pp. 5251-5262,
September 2003.
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2-D Raster Scanning Architecture (Combination of
Free-Space W-MOS and S-MOS)
Transmissive Topology Using Multiple Beam
Collimators SMF Array placed at one Focal
Length Distance from a Lenslet Array
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Experimental Setup to Study Behavior of Lung
Samples
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Near Infrared Spectrums of Scattered Light Signal
Measurements Made _at_ 4 Different Points Indicate
that Optical Signal Signatures for the Sample
Stay About the Same Across Wavelengths in the
Near Infrared Band
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Conclusion

• No-Moving Parts High Speed Ultrasound Beam
  Scanning has been
• Combined with Optical Beam Scanning to Enable A
  Dual Probe Imaging System
• Compact Fiber-Optic Design is Possible
• Steered Wideband Ultrasound can be Generated
  Creating a High Resolution
• Ultrasonic Perturbation that Can be Detected
  and Tracked with a High
• Resolution Optical Beam
• System Appropriate when High Bandwidths/Resolution
  s needed for both Temporal and Spatial Imaging