Limits of radial time constants to approximate thermal response of tissue.

Abstract:

:The time constant model, as an approximation to the bio-heat equation, was tested for non-ablating, deep penetrating (argon) laser beams in absorbing tissue phantoms (polyacrylamide) in air. Temperature responses were measured with a thermal camera, both during laser irradiation as well as after the laser beam was switched off. The radial time constant model was found to give a reasonable prediction (within 5%) of temperature rise for irradiation times of up to the order of one time constant. The cooling behavior of tissue could not be described by one single time constant. The time constant model was found to fit the early cooling rate (cooling time about equal to irradiation time) for laser pulse durations of up to one time constant. The late cooling rate turned out to be much slower than predicted by the radial time constant model, yet it was faster than the cooling rate predicted by the one-dimensional instantaneous hot cylinder surface model.

journal_name

Lasers Surg Med

authors

Meijering LJ,van Gemert MJ,Gijsbers GH,Welch AJ

doi

10.1002/lsm.1900130615

subject

Has Abstract

pub_date

1993-01-01 00:00:00

pages

685-7

issue

6

eissn

0196-8092

issn

1096-9101

journal_volume

13

pub_type

杂志文章
  • Pulmonary blast injury in mice: a novel model for studying blast injury in the laboratory using laser-induced stress waves.

    abstract:BACKGROUND AND OBJECTIVES:Primary blast injury is produced by shock waves. Blast injuries to lungs are extremely critical threats to survival, but their etiology is largely undefined. The majority of animal models for these injuries use explosive or complex experimental settings, limiting the laboratory study of blast ...

    journal_title:Lasers in surgery and medicine

    pub_type: 杂志文章

    doi:10.1002/lsm.20899

    authors: Satoh Y,Sato S,Saitoh D,Tokuno S,Hatano B,Shimokawaji T,Kobayashi H,Takishima K

    更新日期:2010-04-01 00:00:00

  • A light emitting diode (LED) based spatial frequency domain imaging system for optimization of photodynamic therapy of nonmelanoma skin cancer: quantitative reflectance imaging.

    abstract:BACKGROUND:Photodynamic therapy (PDT) offers the potential for enhanced treatment of nonmelanoma skin cancer (NMSC) with minimal scarring. Yet, PDT has not achieved consistent long term effectiveness to gain widespread clinical acceptance for treatment of skin cancer. Therapeutic response varies between practitioners, ...

    journal_title:Lasers in surgery and medicine

    pub_type: 杂志文章

    doi:10.1002/lsm.22139

    authors: Saager RB,Cuccia DJ,Saggese S,Kelly KM,Durkin AJ

    更新日期:2013-04-01 00:00:00

  • Histologic changes associated with talaporfin sodium-mediated photodynamic therapy in rat skin.

    abstract:BACKGROUND AND OBJECTIVE:Alternative treatments are needed to achieve consistent and more complete port wine stain (PWS) removal, especially in darker skin types; photodynamic therapy (PDT) is a promising alternative treatment. To this end, we previously reported on Talaporfin Sodium (TS)-mediated PDT. It is essential ...

    journal_title:Lasers in surgery and medicine

    pub_type: 杂志文章

    doi:10.1002/lsm.22677

    authors: Moy WJ,Yao J,de Feraudy SM,White SM,Salvador J,Kelly KM,Choi B

    更新日期:2017-10-01 00:00:00

  • Reduced in vivo local recurrence with contact neodymium: Yttrium-Aluminium-Garnet (Nd:YAG) laser scalpels.

    abstract:BACKGROUND AND OBJECTIVE:Local recurrence after surgical resection for breast cancer is a significant problem and is often not controlled by radiation or chemotherapy treatments. Local recurrence is thought to be, at least in part, due to residual disease, and/or due to the contamination of the surgical field during re...

    journal_title:Lasers in surgery and medicine

    pub_type: 杂志文章

    doi:10.1002/lsm.1900170406

    authors: Maker VK,Elseth KM,Radosevich JA

    更新日期:1995-01-01 00:00:00

  • Dentinal tubule penetration of AH Plus, iRoot SP, MTA fillapex, and guttaflow bioseal root canal sealers after different final irrigation procedures: A confocal microscopic study.

    abstract:BACKGROUND AND OBJECTIVE:Varied physical and chemical characteristic of root canal sealers and different irrigant agitation systems can influence the depth of penetration. The aim of this in vitro study was to use a laser scanning confocal microscope in order to assess the dentinal tubules penetration of various sealer...

    journal_title:Lasers in surgery and medicine

    pub_type: 杂志文章

    doi:10.1002/lsm.22446

    authors: Akcay M,Arslan H,Durmus N,Mese M,Capar ID

    更新日期:2016-01-01 00:00:00

  • Effect of the CO2 milliwatt laser on tensile strength of microsutures.

    abstract:BACKGROUND AND OBJECTIVE:Laser-assisted tissue repair is often accompanied by a high dehiscence rate, which may be due to alterations in suture material after laser exposure. The goal of this study was to investigate the effect of CO2 laser irradiation on the tensile strength of microsurgical suture material. STUDY DE...

    journal_title:Lasers in surgery and medicine

    pub_type: 杂志文章

    doi:10.1002/(sici)1096-9101(1997)20:1<64::aid-lsm10>3.

    authors: Menovsky T,Beek JF,van Gemert MJ

    更新日期:1997-01-01 00:00:00

  • Treatment of leg veins with combined pulsed dye and Nd:YAG lasers: 60 patients assessed at 6 months.

    abstract:INTRODUCTION:Leg telangiectasias have been reported to have been treated with a variety of lasers. This study was designed to measure response to treatment of leg telangiectasias with a unique coupled 585 nm and 1064 nm pulse. METHODS:Sixty female patients (24-62 y.o., skin types II-IV) with leg vein varicosities were...

    journal_title:Lasers in surgery and medicine

    pub_type: 杂志文章

    doi:10.1002/lsm.20972

    authors: Trelles MA,Weiss R,Moreno-Moragas J,Romero C,Vélez M,Alvarez X

    更新日期:2010-11-01 00:00:00

  • Semiautomated intraocular laser surgery using handheld instruments.

    abstract:BACKGROUND AND OBJECTIVE:In laser retinal photocoagulation, hundreds of dot-like burns are applied. We introduce a robot-assisted technique to enhance the accuracy and reduce the tedium of the procedure. MATERIALS AND METHODS:Laser burn locations are overlaid on preoperative retinal images using common patterns such a...

    journal_title:Lasers in surgery and medicine

    pub_type: 杂志文章

    doi:10.1002/lsm.20897

    authors: Becker BC,MacLachlan RA,Lobes LA Jr,Riviere CN

    更新日期:2010-03-01 00:00:00

  • Photoeradication of Helicobacter pylori using 5-aminolevulinic acid: preliminary human studies.

    abstract:BACKGROUND AND OBJECTIVES:Helicobacter pylori (HP) is an endemic pathogenic bacterium causing gastritis and gastroduodenal ulceration in humans and is linked to the development of gastric malignancies. These first human in vivo studies investigated the photoeradication of HP using laser and white light. STUDY DESIGN/M...

    journal_title:Lasers in surgery and medicine

    pub_type: 临床试验,杂志文章

    doi:10.1002/lsm.10066

    authors: Wilder-Smith CH,Wilder-Smith P,Grosjean P,van den Bergh H,Woodtli A,Monnier P,Dorta G,Meister F,Wagnières G

    更新日期:2002-01-01 00:00:00

  • Low level laser therapy for the management of breast cancer-related lymphedema: A randomized controlled feasibility study.

    abstract:OBJECTIVES:This study aimed to determine the feasibility of conducting a full scale randomized controlled trial investigating the effectiveness of low level laser therapy (LLLT), also known as photobiomodulation (PBM) therapy, used in addition to conventional therapy, for managing breast cancer related lymphedema (BCRL...

    journal_title:Lasers in surgery and medicine

    pub_type: 杂志文章,随机对照试验

    doi:10.1002/lsm.22947

    authors: Baxter GD,Liu L,Tumilty S,Petrich S,Chapple C,Anders JJ,Laser Lymphedema Trial Team.

    更新日期:2018-09-01 00:00:00

  • In vitro and in vivo optimization of infrared laser treatment for injured peripheral nerves.

    abstract:BACKGROUND AND OBJECTIVE:Repair of peripheral nerve injuries remains a major challenge in restorative medicine. Effective therapies that can be used in conjunction with surgical nerve repair to improve nerve regeneration and functional recovery are being actively investigated. It has been demonstrated by a number of pe...

    journal_title:Lasers in surgery and medicine

    pub_type: 杂志文章

    doi:10.1002/lsm.22212

    authors: Anders JJ,Moges H,Wu X,Erbele ID,Alberico SL,Saidu EK,Smith JT,Pryor BA

    更新日期:2014-01-01 00:00:00

  • Surface layer-preserving photodynamic therapy (SPPDT) in a subcutaneous mouse model of lung cancer.

    abstract:BACKGROUND AND OBJECTIVES:Photodynamic therapy (PDT) may be a less invasive treatment for lung cancer. Our newly developed surface layer-preserving PDT (SPPDT) technique enables us to irradiate deep tumor while preserving the overlying tissue. The aim of this basic study was to verify that the SPPDT technique might be ...

    journal_title:Lasers in surgery and medicine

    pub_type: 杂志文章

    doi:10.1002/lsm.22046

    authors: Kawakubo M,Eguchi K,Arai T,Kobayashi K,Hamblin MR

    更新日期:2012-08-01 00:00:00

  • Hair removal with a non-coherent filtered flashlamp intense pulsed light source.

    abstract:BACKGROUND AND OBJECTIVE:To evaluate the effects on disruption of hair growth of the non-coherent filtered flashlamp intense pulsed light (IPL) source. MATERIALS AND METHODS:Twenty-eight sites on 23 patients with Fitzpatrick type I-III were enrolled using a single treatment IPL followed for three months post-treatment...

    journal_title:Lasers in surgery and medicine

    pub_type: 临床试验,杂志文章,随机对照试验

    doi:10.1002/(sici)1096-9101(1999)24:2<128::aid-lsm8>3.

    authors: Weiss RA,Weiss MA,Marwaha S,Harrington AC

    更新日期:1999-01-01 00:00:00

  • Randomized, double-blind, phase III clinical study of a novel nanotechnological topical anesthetic formulation containing lidocaine 25 mg/g and prilocaine 25 mg/g (nanorap) in skin phototypes I-III patients with ablative fractional CO2 laser treatment ind

    abstract:BACKGROUND AND OBJECTIVES:Nanotechnology may increase the speed of penetration into the skin. This study evaluated the efficacy, safety, and pharmacokinetics of a novel topical anesthetic nanocapsule formulation (2 g) containing 2.5% lidocaine and 2.5% prilocaine (nanorap-test formulation) compared to placebo (control ...

    journal_title:Lasers in surgery and medicine

    pub_type: 杂志文章,随机对照试验

    doi:10.1002/lsm.23071

    authors: Gobbato C,Gobbato A,Magalhães TB,Mendes GD,Ilha JO,Moreno RA,Antunes NJ,De Nucci G

    更新日期:2019-09-01 00:00:00

  • Pharmacokinetics of pyropheophorbide-a-hexyl ether in the dog.

    abstract:BACKGROUND AND OBJECTIVES:Pyropheophorbide-a-hexyl ether (HPPH) is a new compound being investigated for use as a photosensitizer for photodynamic therapy; however, the pharmacokinetics are not known for any of the target species likely to be treated with this drug. The objective of this study was to determine the phar...

    journal_title:Lasers in surgery and medicine

    pub_type: 杂志文章

    doi:10.1002/(SICI)1096-9101(1996)18:4<406::AID-LSM10>3

    authors: Payne JT,McCaw DL,Casteel SW,Frazier D,Rogers K,Tompson RV

    更新日期:1996-01-01 00:00:00

  • Current status of infrared fiber optics for medical laser power delivery.

    abstract::There are a host of fiber-optic delivery devices available for use with the Er:YAG, HF, CO, and CO2 lasers at 2.9, 2.8, 5.3, and 10.6 microns wavelengths, respectively. While many of these fibers are not as convenient to use as conventional silica fibers, they offer the ability to deliver infrared laser energy for a w...

    journal_title:Lasers in surgery and medicine

    pub_type: 杂志文章,评审

    doi:10.1002/lsm.1900130513

    authors: Merberg GN

    更新日期:1993-01-01 00:00:00

  • In vitro evaluation of ablation parameters of normal and fibrous aorta using smooth excimer laser coronary angioplasty.

    abstract::A modified excimer laser energy delivery system was used to irradiate 100 segments of normal and fibrous aorta in vitro. The laser beam was scanned into 8 fiber bundles consisting of 50 fibers each resulting in a reduction of the applied pulse energy. The total repetition rate was increased to 150 Hz in order to keep ...

    journal_title:Lasers in surgery and medicine

    pub_type: 杂志文章

    doi:10.1002/lsm.1900130605

    authors: Xie DY,Hassenstein S,Oberhoff M,Hanke H,Baumbach A,Hohla K,Haase KK,Karsch KR

    更新日期:1993-01-01 00:00:00

  • Bactericidal effect of pulsed 1,064 nm Nd:YAG laser light on Staphylococcus epidermidis is of photothermal origin: an in vitro study.

    abstract:BACKGROUND AND OBJECTIVE:The aim was to investigate the bactericidal effect of the 1,064 nm Nd:YAG laser on Staphylococcus epidermidis. MATERIAL AND METHODS:S. epidermidis was inoculated on agar plates and then exposed to pulsed laser light in three different modes: with an uninterrupted train of pulses, or with two d...

    journal_title:Lasers in surgery and medicine

    pub_type: 杂志文章

    doi:10.1002/1096-9101(2000)27:4<336::aid-lsm6>3.0.co;2

    authors: Grönqvist A,Wiström J,Axner O,Monsen TJ

    更新日期:2000-01-01 00:00:00

  • Dynamic behavior of cryogen spray cooling: effects of spurt duration and spray distance.

    abstract:BACKGROUND AND OBJECTIVES:Cryogen spray cooling (CSC) is used to minimize the risk of epidermal damage during laser dermatologic surgery. Since optimization of CSC permits the safe use of higher light doses, which improves therapeutic outcome in many patients with superficial skin lesions, studies have focused on under...

    journal_title:Lasers in surgery and medicine

    pub_type: 杂志文章

    doi:10.1002/lsm.10133

    authors: Aguilar G,Wang GX,Nelson JS

    更新日期:2003-01-01 00:00:00

  • Treatment of atrophic acne scarring with fractional micro-plasma radio-frequency in Chinese patients: A prospective study.

    abstract:BACKGROUND:Acne scarring is a common disfiguring sequela of acne vulgaris which can lead to serious psychosocial problems and have a negative effect on patients' quality of life. Although a variety of approaches can be used to treat atrophic acne scars, disadvantages such as long-healing time, dyspigmentation, infectio...

    journal_title:Lasers in surgery and medicine

    pub_type: 临床试验,杂志文章

    doi:10.1002/lsm.22825

    authors: Lan T,Xiao Y,Tang L,Hamblin MR,Yin R

    更新日期:2018-10-01 00:00:00

  • Optical coherence tomography as a method to identify parathyroid glands.

    abstract:BACKGROUND AND OBJECTIVE:The identification of parathyroid glands can be a major problem in parathyroid surgery. The purpose of this study was to evaluate the feasibility of optical coherence tomography (OCT) in distinguishing between parathyroid tissue, thyroid tissue, lymph nodes, and adipose tissue. METHODS:Ex vivo...

    journal_title:Lasers in surgery and medicine

    pub_type: 杂志文章

    doi:10.1002/lsm.22195

    authors: Ladurner R,Hallfeldt KK,Al Arabi N,Stepp H,Mueller S,Gallwas JK

    更新日期:2013-12-01 00:00:00

  • Photobiomodulation with polychromatic light increases zone 4 survival of transverse rectus abdominis musculocutaneous flap.

    abstract:OBJECTIVE:The aim of this study was to evaluate the effect of relatively novel approach of application of polychromatic light waves on flap survival of experimental musculocutaneous flap model and to investigate efficacy of this modality as a delay procedure to increase vascularization of zone 4 of transverse rectus ab...

    journal_title:Lasers in surgery and medicine

    pub_type: 杂志文章

    doi:10.1002/lsm.23063

    authors: Calis M,Demirtas TT,Sert G,Irmak G,Gumusderelioglu M,Turkkani A,Çakar AN,Ozgur F

    更新日期:2019-08-01 00:00:00

  • Fractional carbon dioxide laser ablation for the treatment of microcystic lymphatic malformations (lymphangioma circumscriptum) in an adult patient with Klippel-Trenaunay syndrome.

    abstract:BACKGROUND:Lymphangioma circumscriptum (LC) is a rare, benign, vascular malformation of dilated superficial lymphatic channels. Treatment is typically undertaken for cosmetic reasons or complications such as fluid drainage, pain, and infection risk that can negatively impact quality of life. Management of LC remains ch...

    journal_title:Lasers in surgery and medicine

    pub_type: 杂志文章

    doi:10.1002/lsm.22379

    authors: Saluja S,Petersen M,Summers E

    更新日期:2015-09-01 00:00:00

  • Therapeutic ratio quantifies laser antisepsis: ablation of Porphyromonas gingivalis with dental lasers.

    abstract:BACKGROUND AND OBJECTIVES:It is established that both pulsed Nd:YAG (1,064 nm) and continuous diode (810 nm) dental lasers kill pathogenic bacteria (laser antisepsis), but a quantitative method for determining clinical dosimetry does not exist. The purpose of this study was to develop a method to quantify the efficacy ...

    journal_title:Lasers in surgery and medicine

    pub_type: 杂志文章

    doi:10.1002/lsm.20086

    authors: Harris DM,Yessik M

    更新日期:2004-01-01 00:00:00

  • Double-frequency Nd:YAG laser vs. argon-green laser in the treatment of proliferative diabetic retinopathy: randomized study with long-term follow-up.

    abstract:BACKGROUND AND OBJECTIVE:A randomized clinical trial using the argon-green (514 nm) and the double-frequency Nd:YAG (532 nm) lasers was carried out on 42 eyes with proliferative diabetic retinopathy (PDR), with the aim of assessing the long-term effects of double-frequency Nd:YAG panretinal photocoagulation (PRP). MAT...

    journal_title:Lasers in surgery and medicine

    pub_type: 临床试验,杂志文章,随机对照试验

    doi:10.1002/(SICI)1096-9101(1996)19:2<173::AID-LSM8>3.

    authors: Bandello F,Brancato R,Lattanzio R,Trabucchi G,Azzolini C,Malegori A

    更新日期:1996-01-01 00:00:00

  • Body contouring by non-invasive transdermal focused ultrasound.

    abstract:BACKGROUND AND OBJECTIVES:The risks of currently available invasive procedures in body contouring motivate a need for safer, non-invasive technologies for improving the appearance of body silhouette. A new device has been developed that uses focused therapeutic ultrasound to reduce adipose tissue non-invasively. The ai...

    journal_title:Lasers in surgery and medicine

    pub_type: 临床试验,杂志文章

    doi:10.1002/lsm.20478

    authors: Moreno-Moraga J,Valero-Altés T,Riquelme AM,Isarria-Marcosy MI,de la Torre JR

    更新日期:2007-04-01 00:00:00

  • In vitro resistance of articular chondrocytes to 5-Aminolevulinic acid based photodynamic therapy.

    abstract:OBJECTIVE:5-Aminolevulinic acid based photodynamic therapy (5-ALA-PDT) has revealed promising results in the treatment of inflammatory joint diseases due to the sensitivity of inflamed synovial tissue. For 5-ALA-PDT to be safe and beneficial for intra-articular applications, resistance of chondrocytes is essential to p...

    journal_title:Lasers in surgery and medicine

    pub_type: 杂志文章

    doi:10.1002/lsm.20625

    authors: Egli RJ,Di Criscio A,Hempfing A,Schoeniger R,Ganz R,Hofstetter W,Leunig M

    更新日期:2008-04-01 00:00:00

  • Pc 4 photodynamic therapy of U87-derived human glioma in the nude rat.

    abstract:BACKGROUND AND OBJECTIVES:As a potential therapy for malignant glioma, we tested the phthalocyanine photosensitizer Pc 4 for: (1) rapid clearance from the vasculature, (2) specificity for glioma, and (3) tumoricidal photosensitizing capability. STUDY DESIGN/MATERIALS AND METHODS:Parenchymal injection of U87 cells into...

    journal_title:Lasers in surgery and medicine

    pub_type: 杂志文章

    doi:10.1002/lsm.20185

    authors: George JE 3rd,Ahmad Y,Varghai D,Li X,Berlin J,Jackowe D,Jungermann M,Wolfe MS,Lilge L,Totonchi A,Morris RL,Peterson A,Lust WD,Kenney ME,Hoppel CL,Sun J,Oleinick NL,Dean D

    更新日期:2005-06-01 00:00:00

  • Fine structure of zonal changes in experimental Nd:YAG laser-induced interstitial hyperthermia.

    abstract::Interstitial thermotherapy using Nd:YAG-laser induced hyperthermia is a new stereotactic method for the treatment of brain tumors in poorly accessible regions. To provide a basis for the underlying tissue alterations, we have analyzed the spatial and temporal pattern of interstitial laser hyperthermia lesions in the n...

    journal_title:Lasers in surgery and medicine

    pub_type: 杂志文章

    doi:10.1002/lsm.1900130212

    authors: Schober R,Bettag M,Sabel M,Ulrich F,Hessel S

    更新日期:1993-01-01 00:00:00

  • Facial teleangectasias: our experience in treatment with IPL.

    abstract:BACKGROUND AND OBJECTIVES:Facial teleangectasias can be a relevant cosmetic problem, which the patient usually hides with a thick layer of makeup. This study will describe the response on these vascular lesions using the intense pulsed light (IPL) source. METHODS:Five hundred eighteen consecutive patients were treated...

    journal_title:Lasers in surgery and medicine

    pub_type: 杂志文章

    doi:10.1002/lsm.20187

    authors: Clementoni MT,Gilardino P,Muti GF,Signorini M,Pistorale A,Morselli PG,Cavina C

    更新日期:2005-07-01 00:00:00