✦ LIBER ✦

Measurement of the optical and thermal properties of biliary calculi using pulsed photothermal radiometry

✍ Scribed by Frederick H. Long; Norman S. Nishioka; Thomas F. Deutsch

Publisher: John Wiley and Sons
Year: 1987
Tongue: English
Weight: 527 KB
Volume: 7
Category: Article
ISSN: 0196-8092
DOI: 10.1002/lsm.1900070604

No coin nor oath required. For personal study only.

✦ Synopsis

The optical absorption coefficients for biliary calculi are important in understanding the mechanism of laser-induced stone fragmentation. However, the heterogeneous composition of calculi and difficulties in producing optically thin samples prevent conventional spectrophotometric measurement techniques from being used. To overcome these limitations, we used a pulsed photothermal radiometry system to measure the optical absorption coefficients and thermal diffusivities of various biliary calculi. In the wavelength range examined (350-1,060 nm), there was strong optical absorption which was greater for pigment stones than for cholesterol stones. The data support the theory that the initiation of the plasma accompanying laser fragmentation of calculi is a thermal process.

📜 SIMILAR VOLUMES

Comparison of pulsed photothermal radiom

Comparison of pulsed photothermal radiometry, optical coherence tomography and ultrasound for melanoma thickness measurement in PDMS tissue phantoms

✍ Tianyi Wang; Srivalleesha Mallidi; Jinze Qiu; Li L. Ma; Amit S. Paranjape; Jingj 📂 Article 📅 2010 🏛 John Wiley and Sons 🌐 English ⚖ 402 KB

## Abstract Melanoma accounts for 75% of all skin cancer deaths. Pulsed photothermal radiometry (PPTR), optical coherence tomography (OCT) and ultrasound (US) are non‐invasive imaging techniques that may be used to measure melanoma thickness, thus, determining surgical margins. We constructed a ser

Comparison of the optical, thermal and s

Comparison of the optical, thermal and structural properties of Ge–Sb–S thin films deposited using thermal evaporation and pulsed laser deposition techniques

✍ J.D. Musgraves; N. Carlie; J. Hu; L. Petit; A. Agarwal; L.C. Kimerling; K.A. Ric 📂 Article 📅 2011 🏛 Elsevier Science 🌐 English ⚖ 423 KB

Thin films of Ge 23 Sb 7 S 70 glass were prepared by thermal evaporation (TE) and pulsed laser deposition (PLD) techniques. We measured their thermal, optical and structural properties and compared with those of the parent bulk. The probe penetration temperature (T p ) of the bulk glass, measured us

The effects of grating period and heatin

The effects of grating period and heating duration time on the measurement of thermal diffusivity of liquids using photothermal grating spectroscopy

✍ Jung Hun Kim; Daesung Chi; Sok Won Kim; Chul Kyu Choi; Chunghi Rhee 📂 Article 📅 1995 🏛 Elsevier Science 🌐 English ⚖ 439 KB

Measurement of the critical properties o

Measurement of the critical properties of thermally unstable substances and mixtures by the pulse-heating method

✍ E.D. Nikitin; P.A. Pavlov; P.V. Skripov 📂 Article 📅 1993 🏛 Elsevier Science 🌐 English ⚖ 340 KB

Measurement of the thermal characteristi

Measurement of the thermal characteristics of packaged double-heterostructure light emitting diodes for space applications using spontaneous optical spectrum properties

✍ L. Bechou; O. Rehioui; Y. Deshayes; O. Gilard; G. Quadri; Y. Ousten 📂 Article 📅 2008 🏛 Elsevier Science 🌐 English ⚖ 804 KB

Measurement of thermal effects on the op

Measurement of thermal effects on the optical properties of prostate tissue at wavelengths of 1,064 and 633 nm

✍ Nau, William H.; Roselli, Robert J.; Milam, Douglas F. 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 205 KB 👁 1 views

## Background and Objective: The extent of thermal injury during laser prostatectomy is dependent on the light distribution in laser-irradiated tissue. As tissue is irradiated, the optical properties change as a function of temperature due to an alteration of molecular and cellular structure. The p