Catheters for optical coherence tomography

Ullah, Hafeez; Hamza, Muhammad; Ikram, Manzoor

doi:10.1002/lapl.201110035

Cited by 20 publications

(20 citation statements)

References 121 publications

(165 reference statements)

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“…The unique information content of the OCT's backscattered signal ensures high sensitivity to differ ent biological structures/analytes [6]. OCT can access a variety of clinical sites due to its compatibility with probes and catheters [7]. OCT shows some promise in measuring blood glucose levels (~1 gm of glucose in a liter of blood for normal physiology (5-6 mM) and 3-25 mM fluctuations in diabetics) [8].…”

Section: Introductionmentioning

confidence: 99%

Quantification of glucose levels in flowing blood using M-mode swept source optical coherence tomography

et al. 2012

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The increase of glucose levels in blood changes the viscosity of flowing fluids and shape of the erythrocytes. Both of these can affect the details of light scattering as can be quantified via decorrelation times measured by optical coherence tomography (OCT). The relative contributions of these competing effects have been studied by examining the motion dynamics of deformable asymmetrical (red blood cells, RBCs with ~7 µm diameter and ~2 µm thickness) and non deformable symmetrical (polystyrene microspheres, PSM with 1.4 µm diameter) flowing scattering particles. The fluid flow under the action of gravity was mod ulated by changing the glucose concentrations. Quantitative analysis of the OCT's M mode autocorrelation functions enabled the derivations of the translational diffusion coefficients. These systematic studies are aimed at eventual tissue imaging scenarios with speckle variance OCT to obtain local glucose concentrations maps.

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Section: Introductionmentioning

confidence: 99%

Quantification of glucose levels in flowing blood using M-mode swept source optical coherence tomography

et al. 2012

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“…Besides experiences from new laser systems for practi cal use [29], recent imaging techniques [30,31] can improve future investigations of the dosimetry of light in ophthalmology. Fig.…”

Section: Discussionmentioning

confidence: 99%

Comparison of retina damage thresholds simulating the femtosecond-laser in situ keratomileusis (fs-LASIK) process with two laser systems in the CW- and fs-regime

Sander¹,

Minet

Zabaryło

et al. 2012

Laser Phys.

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The femtosecond laser in situ keratomileusis procedure affords the opportunity to correct ametropia by cutting transparent corneal tissue with ultra short laser pulses. Thereby the tissue cut is gener ated by a laser induced optical breakdown in the cornea with ultra short laser pulses in the near infrared range. Compared to standard procedures such as photorefractive keratectomy and laser in situ keratomileusis with the excimer laser, where the risk potential for the eye is low due to the complete absorption of ultraviolet irradiation from corneal tissue, only a certain amount of the pulse energy is deposited in the cornea during the fs LASIK process. The remaining energy propagates through the eye and interacts with the retina and the strong absorbing tissue layers behind. The objective of the presented study was to determine and compare the retina damage thresholds during the fs LASIK process simulated with two various laser systems in the CW and fs regime.

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“…113 A recent review of the different designs of imaging probes is available. 6 Particular interest has gone into building diagnostic probes for imaging within the esophagus for providing a means of diagnosing Barrett's esophagus, and imaging in the colon for carcinoma staging. 113 Two probe designs are currently most practical for clinical use: linear scanning catheters 13 and circumferential scanning catheters.…”

Section: Optical Coherence Tomographymentioning

confidence: 99%

Surgical Vision

Stoyanov

2011

Ann Biomed Eng

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The emergence of Minimal Access Surgery (MAS) as a paradigm in modern healthcare treatment has created new challenges and opportunities for automated image understanding and computer vision. In MAS, images recovered from inside the body using specialized devices are used to visualize and operate on the surgical site but they can also be used to computationally infer in vivo 3D tissue surface shape, soft-tissue morphology, and surgical instrument motion. This information is important for facilitating in vivo biophotonic imaging modalities where the interaction between light and tissue is used to infer the structural and functional properties of the tissue. This article provides a review of the literature for computer vision and image understanding techniques applied to MAS images. The focus of this article is to elucidate a perspective on how computer vision techniques can be used to support and enhance the capabilities of biophotonic imaging modalities during surgery. Note that while MAS encompasses a variety of surgical specializations this review does not involve procedures performed in the interventional suite. The review has been carried out based on searches in the PubMed and IEEE databases using the article's keywords.

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Catheters for optical coherence tomography

Cited by 20 publications

References 121 publications

Quantification of glucose levels in flowing blood using M-mode swept source optical coherence tomography

Quantification of glucose levels in flowing blood using M-mode swept source optical coherence tomography

Comparison of retina damage thresholds simulating the femtosecond-laser in situ keratomileusis (fs-LASIK) process with two laser systems in the CW- and fs-regime

Surgical Vision

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