Literature DB >> 29296495

Spatial effect of conical angle on optical-thermal distribution for circumferential photocoagulation.

Van Gia Truong1,2, Suhyun Park3,2, Van Nam Tran1, Hyun Wook Kang4,5.   

Abstract

A uniformly diffusing applicator can be advantageous for laser treatment of tubular tissue. The current study investigated various conical angles for diffuser tips as a critical factor for achieving radially uniform light emission. A customized goniometer was employed to characterize the spatial uniformity of the light propagation. An ex vivo model was developed to quantitatively compare the temperature development and irreversible tissue coagulation. The 10-mm diffuser tip with angle at 25° achieved a uniform longitudinal intensity profile (i.e., 0.90 ± 0.07) as well as a consistent thermal denaturation on the tissue. The proposed conical angle can be instrumental in determining the uniformity of light distribution for the photothermal treatment of tubular tissue.

Keywords:  (120.6810) Thermal effects; (140.3390) Laser materials processing; (170.1610) Clinical applications; (170.3660) Light propagation in tissues; (230.1980) Diffusers

Year:  2017        PMID： 29296495      PMCID： PMC5745110          DOI： 10.1364/BOE.8.005663

Source DB:  PubMed          Journal:  Biomed Opt Express        ISSN： 2156-7085            Impact factor:   3.732


  19 in total

1.  Optical properties of native and coagulated porcine liver tissue between 400 and 2400 nm.

Authors:  J P Ritz; A Roggan; C Isbert; G Müller; H J Buhr; C T Germer
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2.  Dynamic etching method for fabricating a variety of tip shapes in the optical fibre probe of a scanning near-field optical microscope.

Authors:  H Muramatsu; K Homma; N Chiba; N Yamamoto; A Egawa
Journal:  J Microsc       Date:  1999 May-Jun       Impact factor: 1.758

3.  Shape control of near-field probes using dynamic meniscus etching.

Authors:  L H Haber; R D Schaller; J C Johnson; R J Saykally
Journal:  J Microsc       Date:  2004-04       Impact factor: 1.758

4.  Fiberoptic microneedles: novel optical diffusers for interstitial delivery of therapeutic light.

Authors:  Mehmet A Kosoglu; Robert L Hood; John H Rossmeisl; David C Grant; Yong Xu; John L Robertson; Marissa Nichole Rylander; Christopher G Rylander
Journal:  Lasers Surg Med       Date:  2011-11       Impact factor: 4.025

5.  Design and performance of thin cylindrical diffusers created in Ge-doped multimode optical fibers.

Authors:  Leonid Vesselov; William Whittington; Lothar Lilge
Journal:  Appl Opt       Date:  2005-05-10       Impact factor: 1.980

6.  Performance of a dedicated light delivery and dosimetry device for photodynamic therapy of nasopharyngeal carcinoma: phantom and volunteer experiments.

Authors:  H J Nyst; R L P van Veen; I B Tan; R Peters; S Spaniol; D J Robinson; F A Stewart; P C Levendag; H J C M Sterenborg
Journal:  Lasers Surg Med       Date:  2007-09       Impact factor: 4.025

7.  Real-time temperature monitoring with fiber Bragg grating sensor during diffuser-assisted laser-induced interstitial thermotherapy.

Authors:  Ngot Thi Pham; Seul Lee Lee; Suhyun Park; Yong Wook Lee; Hyun Wook Kang
Journal:  J Biomed Opt       Date:  2017-04-01       Impact factor: 3.170

8.  Assessing blood coagulation status with laser speckle rheology.

Authors:  Markandey M Tripathi; Zeinab Hajjarian; Elizabeth M Van Cott; Seemantini K Nadkarni
Journal:  Biomed Opt Express       Date:  2014-02-24       Impact factor: 3.732

Review 9.  Laser applications in surgery.

Authors:  Beina Azadgoli; Regina Y Baker
Journal:  Ann Transl Med       Date:  2016-12

10.  Temperature feedback-controlled photothermal treatment with diffusing applicator: theoretical and experimental evaluations.

Authors:  Trung Hau Nguyen; Suhyun Park; Kyu Kyu Hlaing; Hyun Wook Kang
Journal:  Biomed Opt Express       Date:  2016-04-19       Impact factor: 3.732
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  2 in total

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Journal:  Opt Express       Date:  2019-03-04       Impact factor: 3.894

2.  Optimization of sapphire capillary needles for interstitial and percutaneous laser medicine.

Authors:  Irina N Dolganova; Irina A Shikunova; Gleb M Katyba; Arsen K Zotov; Elena E Mukhina; Marina A Shchedrina; Valery V Tuchin; Kirill I Zaytsev; Vladimir N Kurlov
Journal:  J Biomed Opt       Date:  2019-12       Impact factor: 3.170
  2 in total

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