Articles in category: Probes

1. Endovascular Optical Coherence Tomography Device (Wo 2009/094341)

   Explore wipo.int Jul 30 2009 Cardiology , Patents , Probes

   

   An endovascular OCT probe is included in an endovasculiar access device for intravascular imaging. The probe includes a hollow coil wire defining an axial lumen of the endovascular access device. A single mode optical fiber for transmitting light is disposed in the axial lumen of the hollow coil wire so that translation and rotation of the hollow coil wire carrying the optical fiber within the endovascular access device is stabilized for scanning endovascuiar tissue with at least 5 microns resolution. An optic element directs light from and into the optical fiber at a distal tip of the optica! fiber and ...

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   Mentions: Zhongping Chen Mark E. Linskey UC Irvine

2. Two-dimensional scanning realized by an asymmetry fiber cantilever driven by single piezo bender actuator for optical coherence tomography

   Explore opticsinfobase.org Jul 24 2009 Probes

   

   We develop a fiber based probe that is capable of two-dimensional scanning applicable in optical coherence tomography (OCT). Based on the resonance of the fiber cantilever with asymmetry structure which has two distinguished resonant frequencies in orthogonal directions, Lissajous pattern is produced suitable for two-dimensional scanning upon a sample. Orthogonal resonances of the fiber cantilever are simultaneously excited by single piezo bender actuator with one driving signal consisting of two components corresponding to above-mentioned two resonant frequencies. By integrating a backward-placed two-dimensional position sensitive detector (PSD) into the probe, real-time lateral position of the scanning pattern is registered simultaneously for ...

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   Mentions: Zhihua Ding Zhejiang University

3. Miniature Non-MEMS Scanner for Small Size Imaging Systems

   Explore managingautomation.com Jul 21 2009 Other Business News , Probes

   The SMALLEST available non-MEMS Resonant Scanner currently on the market was developed by Electro-Optical Products Corp. It is a miniature electromagnetically driven moving mirror device (0.9 x 0.5 x 0.4 inches), which deflects a light beam with a continuous sinusoidal motion. The SC-3''s mirror size is what truly differentiates the product from MEMS-based scanners. A mirror in a MEMS-based scanner is typically 1x1 mm, whereas EOPC''s technology offers 6 mm diameter, 7 x 7 mm and 12 x 7 mm size mirrors, with an optical scanning angle up to 50°, and a fixed-frequency scanning range ...

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   Mentions: Electro-Optical Products Corporation

4. Multibeam OCT scanner for skin imaging by Michelson Diagnostics

   Explore BioOptics World Jul 8 2009 Probes

   The VivoSight Multi-Beam OCT (optical coherence tomography) scanner uses the high resolution capability of Michelson Diagnostics Ltd.'s (MDL) proprietary technology to image skin and other surface tissue with a hand-held probe. The compact, ergonomically designed probe promises an isotropic resolution of better than 10 microns to a depth of up to 2 mm. Scan rates vary from 6.5 fps to 35 fps depending on scan width, which, in turn, can be varied up to 5 mm.

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   Mentions: Michelson Diagnostics Michelson Diagnostics Vivosight Barbara G. Goode

5. Apparatus using optical coherence tomography based on spectral interference, and an ophthalmic apparatus

   Explore uspto.gov Jul 7 2009 Patents , Probes

   An apparatus using optical coherence tomography based on spectral interference and an ophthalmic apparatus, which can accurately obtain information on an object in a depth direction by correcting misalignment between an optical member of a spectral optical system and a photodetector, includes an interference optical system for irradiating measurement light being low coherent light onto the object and synthesizing the measurement light reflected from the object and reference light being low coherent light to interfere, a spectral optical system which disperses interference light for every frequency, a photodetector photo-receiving the dispersed interference light, means guiding calibration light for adjusting alignment ...

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   Mentions: Nidek

6. Feature Of The Week 7/5/09: Single-body lensed-fiber scanning probe actuated by magnetic force for optical imaging

   Explore Optical Coherence Tomography News Jul 5 2009 Probes

   

   Feature Of The Week: 7/5/09: In recent years, hand-held and endoscopic optical coherence tomography (OCT) has been investigated for a variety of clinical and therapeutic applications. As critical factors affecting the OCT performance, compactness and scanning speed of the sample arm of an OCT system have been widely recognized. Therefore, many scanning schemes have been investigated such as piezoelectric, rotational-micro-electro-mechanical-system (MEMS), electrostatic, and bimorph scanners. However, the piezoelectric scanner required high driving voltage, the MEMS scanner needs a complicated fabrication process, and the performance of the bimorph was material dependent and sensitive to external parameters, such as temperature ...

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   Mentions: Seon Young Ryu Byeong Ha Lee Eun Jung Min

7. Towards freehand image acquisition in optical coherence tomography

   Explore Home: SPIE.org Jun 30 2009 Probes

   

   A new data-capture method could provide increased flexibility for clinical imaging applications. Optical coherence tomography (OCT), a biomedical diagnostic-imaging technique, is currently transitioning from the research laboratory into clinical practice.1 Providing micrometer-scale resolution over millimeter-scale fields of view, OCT is the optical analog of ultrasound. It uses low-coherence interferometry to perform optical ranging in biological tissue. Clinical applications under investigation include optical biopsy2 and detection of tumor margins during image-guided surgery.3 The clinical applications of OCT benefit from its real-time imaging capability and diverse sample-arm designs, including hand-held probes, rotating fiber-optic catheters, and miniature needles. The real-time diagnostic ...

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   Mentions: Stephen A. Boppart Utkarsh Sharma University of Illinois at Urbana-Champaign

8. Probe and optical tomography system

   Explore uspto.gov Jun 23 2009 Patents , Probes

   An optical fiber is disposed in the direction of axis of the outer envelope inside a tubular outer envelope. Light emitted from the front end of the optical fiber is collected and projected on a body-to-be-scanned disposed externally of the outer envelope, and converged on the body-to-be-scanned. The outer envelope is filled with liquid so that the optical fiber is in the liquid.

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   Mentions: Fujifilm Medical Systems

9. High-resolution OCT balloon imaging catheter with astigmatism correction

   Explore opticsinfobase.org Jun 18 2009 Cardiology , Gastroenterology , Probes

   

   We report new optics designs for an optical coherence tomography (OCT) balloon imaging catheter to achieve diffraction-limited high resolution at a large working distance and enable the correction of severe astigmatism in the catheter. The designs employed a 1 mm diameter gradient-index lens of a properly chosen pitch number and a glass rod spacer to fully utilize the available NA of the miniature optics. Astigmatism caused by the balloon tubing was analyzed, and a method based on a cylindrical reflector was proposed and demonstrated to compensate the astigmatism. A catheter based on the new designs was successfully developed with a ...

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   Mentions: Johns Hopkins University University of Washington Michael J. Cobb

10. A concentric three element radial scanning optical coherence tomography endoscope

    Explore www3.interscience.wiley.com Jun 16 2009 Gastroenterology , Probes

    We have developed a 2.1 mm outer diameter optical coherence tomography endoscope that provides radial scans of luminal structures. The endoscope consists of three elements: (1) a stationary central core containing the fibers and focusing elements, (2) a rotating intermediate tube with a distal rod prism, and (3) a stationary sterilized glass cover. This design enables radial and spiral scanning and allows adjustment of the axial focal distance. Additionally, this design is capable of focusing light from multiple fibers into tissue. The performance of the endoscope was demonstrated in a study of tissue engineered blood vessels imaged at various ...

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    Mentions: Jennifer K. Barton University of Arizona Garret T. Bonnema

11. Single-body lensed-fiber scanning probe actuated by magnetic force for optical imaging

    Explore opticsinfobase.org Jun 11 2009 Probes

    

    We propose a fiber-based hand-held scanning probe suitable for the sample arm of an optical imaging system including optical coherence tomography. To achieve compactness, a single-body lensed-fiber and a solenoid actuator were utilized. The focusing lens of the probe was directly formed onto the distal end of a fiber, which eliminated the need for additional optical components and optical alignment. A ferromagnetic iron bead was glued onto the middle of the fiber to enable actuation by magnetic force, which allowed easy fabrication and good practicality. The fiber piece having the built-in fiber lens was forced to oscillate in its resonant ...

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    Mentions: Seon Young Ryu Byeong Ha Lee Eun Jung Min

12. Optical probe

    Explore uspto.gov Jun 9 2009 Patents , Probes

    An optical probe has a tubular outer envelope, and a shaft rotatable about a rotating axis extending longitudinal direction of the outer envelope. A light guide disposed to extend along the shaft is connected to the shaft at its leading end portion, a light deflector connected to the leading end portion of the light guide deflects light radiated from the leading end portion of the light guide, and a collecting lens converges light radiated from the light deflector outside the outer envelope. Light emitted from the light deflector is scanned along the outer envelope in response to movement of the ...

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    Mentions: Fujifilm Medical Systems

13. Optical probe and optical tomography system

    Explore uspto.gov May 26 2009 Patents , Probes

    An optical probe includes a tubular outer envelope and a optical fiber which extends in the longitudinal direction of the outer envelope inside the outer envelope. By fixing a light deflecting element to the optical fiber and rotating the optical fiber by a driver, the light deflecting element is rotated. A protective member which has a higher resistance to wear than the outer peripheral surface of the optical fiber is fixed to a part of the outer peripheral surface of the optical fiber in a position near the front end of the optical fiber and is borne for rotation by ...

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    Mentions: Fujifilm Medical Systems

14. Catheter device

    Explore uspto.gov May 26 2009 Patents , Probes

    Catheter device for insertion into a vessel of a human or animal body, comprising a guide catheter and, incorporated in same, an OCT catheter with an OCT imaging device, the guide catheter having a balloon inflatable via a supply line for occluding the vessel, as well as a device for delivering a liquid or gas to the vascular region to be recorded by means of the OCT imaging device, in particular the vascular region located distally to the balloon, wherein there is provided on the guide catheter a second inflatable balloon spaced apart from the first balloon for occluding the ...

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    Mentions: Siemens

15. Design of optical coherence tomography probe using a 2-axis MEMS scanning mirror

    Explore SPIE Digital Library May 18 2009 Probes

    We design a dual axis rotary mirror based on microelectromechanical system technology used for the endoscopic optical coherence tomography (OCT) application. With the inherent advantages of the micromachined device such as small size, low consumption and high reliability, it allows the miniaturization of conventional bulky OCT probe. The dimension of the micro-mirror is 140um×270um. Through use of finite element method, the simulation results show that the scanning mirror is capable of high frequency out-of-plane rotation in two mutually independent axes. The natural frequencies of the first two modes, corresponding to tip and tilt modes, are 65.74 KHz and ...

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16. Cross-correlation-based image acquisition technique for manually-scanned optical coherence tomography

    Explore opticsinfobase.org Apr 29 2009 Probes

    

    We present a novel image acquisition technique for Optical Coherence Tomography (OCT) that enables manual lateral scanning. The technique compensates for the variability in lateral scan velocity based on feedback obtained from correlation between consecutive A-scans. Results obtained from phantom samples and biological tissues demonstrate successful assembly of OCT images from manually-scanned datasets despite non-uniform scan velocity and abrupt stops encountered during data acquisition. This technique could enable the acquisition of images during manual OCT needle-guided biopsy or catheter-based imaging, and for assembly of large field-of-view images with hand-held probes during intraoperative in vivo OCT imaging.

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    Mentions: Stephen A. Boppart Utkarsh Sharma University of Illinois at Urbana-Champaign

17. A prototype hybrid intraoperative probe for ovarian cancer detection

    Explore opticsinfobase.org Apr 19 2009 Gynecology , Oncology , Probes

    

    A novel prototype intraoperative system combining positron detection and optical coherence tomography (OCT) imaging has been developed for early ovarian cancer detection. The probe employs eight plastic scintillating fiber tips for preferential detection of local positron activity surrounding a central scanning OCT fiber providing volumetric imaging of tissue structure in regions of high radiotracer uptake. Characterization measurements of positron sensitivity, spatial response, and position mapping are presented for Tl204/Cs137 sources as well as 18F-FDG. In conjunction with co-registered frequency domain OCT measurements the results demonstrate the potential for a miniaturized laparoscopic probe offering simultaneous functional localization and structural imaging ...

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    Mentions: Quing Zhu Yueli L. Chen Yi Yang

18. Method for obtaining the image of an object, device for carrying out said method and device for delivering low coherent optical radiation

    Explore uspto.gov Apr 7 2009 Patents , Probes

    The invention relates to studies of internal structures of objects with the aid of optical means. According to the invention an optical system (15) of the delivering device for low coherence optical radiation, in a particular embodiment, an optical fiber probe (8), includes at least two lens components (19), (20), which have a positive focal power and are positioned substantionally confocally. This ensures a constant propagation time for the low coherence optical radiation propagating from a given point of the transverse scanning surface (28) or (39) to a corresponding conjugate point of the image plane (22). That provides elimination of ...

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    Mentions: Imalux Felix I. Feldchtein Institute of Applied Physics

19. Feature Of The Week 3/8/09: MEMS micromirror with dual-reflective surfaces for circumferential scanning endoscopic OCT imaging

    Explore Optical Coherence Tomography News Mar 8 2009 Gastroenterology , Probes

    

    Feature Of The Week 3/8/09: Optical endoscopic imaging based on high-resolution, cross-sectional imaging techniques such as optical coherence tomography and non-linear optical imaging has demonstrated a great potential for non-invasive, in vivo clinical applications especially after MEMS probe scanning mirrors are employed as the scanning mechanisms. For intravascular and some internal organ imaging applications, imaging probes with full circumferential scanning (FCS) capability are highly desired. Professor Huikai Xie, PhD Student Lei Wu, and others from the University of Florida, have made some very impressive MEMS scanner designs. This video shows a dual-reflective MEMS mirror using a dual-folded electrothermal ...

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    Mentions: University of Florida Lei Wu Huikai K. Xie

20. Spectral-domain low coherence interferometry/optical coherence tomography system for fine needle breast biopsy guidance

    Explore Scitation Feb 26 2009 Oncology , Probes

    A novel technology and instrumentation for fine needle aspiration (FNA) breast biopsy guidance is presented. This technology is based on spectral-domain low coherence interferometry (SD-LCI). The method, apparatus, and preliminary in vitro/in vivo results proving the viability of the method and apparatus are presented in detail. An advanced tissue classification algorithm, preliminarily tested on breast tissue specimens and a mouse model of breast cancer is presented as well. Over 80% sensitivity and specificity in differentiating all tissue types and 93% accuracy in differentiating fatty tissue from fibrous or tumor tissue was obtained with this technology and apparatus. These results ...

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    Mentions: Daniel X. Hammer Physical Sciences Incorporated R. Daniel Ferguson

21. In-vivo office-based dynamic imaging of vocal cords in awake patients with swept-source optical coherence tomography

    Explore SPIE Digital Library Feb 23 2009 Otolaryngology , Probes

    Optical coherence tomography (OCT) is an evolving noninvasive imaging modality and has been used to image the human larynx during surgical endoscopy. The design of a long GRIN lens based probe capable of capturing images of the human larynx by use of swept-source OCT during a typical office-based laryngoscopy examination is presented. In vivo OCT imaging of the human larynx is demonstrated with 40 fame/second. Dynamic vibration of the vocal folds is recorded to provide not only high-resolution cross-sectional tissue structures but also vibration parameters, such as the vibration frequency and magnitude of the vocal cord, which provide important ...

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    Mentions: Zhongping Chen Shuguang Guo UC Irvine

22. Electrothermal micromirror with dual-reflective surfaces for circumferential scanning endoscopic imaging

    Explore SPIE Digital Library Feb 20 2009 Gastroenterology , Probes

    We report the design, fabrication, and measurements of a dual-reflective, single-crystal silicon-based micromirror that can perform circumferential scanning for endoscopic optical coherence tomography (EOCT). Full 360-deg optical scan angle (OSA) can be achieved by using a dual-reflective mirror with ±45-deg (or 90-deg) mechanical scan angle (MSA), where each reflective mirror surface contributes a 180-deg optical scanning. A novel surface- and bulk-combined micromachining process based on silicon on insulator (SOI) wafers is developed for fabricating the dual-reflective micromirror. The mirror flatness is maintained by the single-crystal-silicon device layer of SOI wafers, and aluminum is coated on both sides for reflection. A ...

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    Mentions: University of Florida Lei Wu Huikai K. Xie

23. Coherent fibre bundles in full-field swept-source OCT

    Explore SPIE Digital Library Feb 20 2009 Gastroenterology , Probes

    Endoscopic OCT probes deliver light to the measurement region via a single optical fibre mounted in a probe head. The output beam is focused onto the sample, providing a single point measurement. The beam is translated, using mechanical scanning at the probe tip, to address a line or area of sampling points and produce an image. We are investigating a swept-source OCT system incorporating coherent fibre bundles, to allow many measurement points to be addressed, within an area of the sample, without the need for mechanical motion within the endoscope probe. Scanning components are still present at the input of ...

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    Mentions: Cranfield University Ralph P. Tatam Helen D. Ford

24. Single-body lensed fiber probe actuated by magnetic force for spectral domain optical coherence tomography

    Explore SPIE Digital Library Feb 20 2009 Probes

    We propose a fiber-based hand-held scanning probe suitable for the sample arm of spectral domain optical coherence tomography (SD-OCT). To achieve a compact and miniaturized probe, a single-body lensed-fiber, on which an iron-bead ferromagnetic material is loaded was fabricated and a solenoid actuat ... [Proc. SPIE 7168, 71682I (2009)] published Fri Feb 20, 2009.

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    Mentions: Seon Young Ryu Byeong Ha Lee Eun Jung Min

Popular Articles

• Feature Of The Week 3/8/09: MEMS micromirror with dual-reflective surfaces for circumferential scanning endoscopic OCT imaging  
• Optical coherent tomographic (OCT) imaging apparatus and method using a fiber bundle  
• Integrated intravascular optical coherence tomography (OCT) - ultrasound (US) imaging system  
• Feature Of The Week 2/13/09: Common-Path Optical Coherence Tomography Using an Integrated Fiber Microlens  
• Feature Of The Week 2/7/10: Manual-Scanning Optical Coherence Tomography (OCT) Probe Based on Position Tracking  
• Comparison of different focusing systems for common-path optical coherence tomography with fiber-optic bundle as endoscopic probe  
• Electrothermal micromirror with dual-reflective surfaces for circumferential scanning endoscopic imaging  
• Fiber optic needle probes for optical coherence tomography imaging  
• 3D endoscopic optical coherence tomography based on rapid-scanning MEMS mirrors  
• Biomedical Imaging: MEMS scanners enable in vivo 3-D OCT  

Organizations in the News

1. (1 articles) University of Maryland
2. (1 articles) Medical University of Vienna

People in the News

1. (1 articles) Yu Chen
2. (1 articles) Chia-Pin Liang
3. (1 articles) Johannes F. de Boer