keyword
MENU ▼
Read by QxMD icon Read
search

skin lasers

keyword
https://www.readbyqxmd.com/read/28432730/assessment-of-voluntary-deep-inspiration-breath-hold-with-cine-imaging-for-breast-radiotherapy
#1
Reuben Patrick Estoesta, Lani Attwood, Diana Naehrig, Elizabeth Claridge-Mackonis, David Odgers, Darren Martin, Melissa Pham, Joanne Toohey, Susan Carroll
Deep Inspiration Breath-Hold (DIBH) techniques for breast cancer radiation therapy (RT) have reduced cardiac dose compared to Free Breathing (FB). Recently, a voluntary deep inspiration breath-hold (vDIBH) technique was established using in-room lasers and skin tattoos to monitor breath-hold. An in-house quality assessment of positional reproducibility during RT delivery with vDIBH in patients with left-sided breast cancer was evaluated. The electronic portal imaging device (EPID) was used in cinematographic (CINE) mode to capture a sequence of images during beam delivery...
April 22, 2017: Journal of Medical Imaging and Radiation Oncology
https://www.readbyqxmd.com/read/28429191/melanogenesis-inhibition-in-mice-using-a-low-fluence-1064-nm-q-switched-neodymium-doped-yttrium-aluminum-garnet-laser-a-pilot-study
#2
Jae-Hui Nam, Joon Hong Min, Wang-Kyun Kim, Sunmin Yim, Won-Serk Kim
A low-fluence 1064-nm Q-switched neodymium-doped yttrium aluminum garnet laser, or laser toning, has yielded favorable outcomes in various benign pigmented disorders. However, the exact mechanism of action of laser toning has not been fully elucidated. We sought to determine the inhibitory effect of laser toning on melanogenesis and to assess how laser passes influence the outcomes. To produce perceptible pigmentation, nine HRM-2 melanin-possessing hairless mice were treated with ultraviolet (UV) B radiation on the dorsal skin...
April 20, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28428827/fundamental-research-on-the-action-mechanism-of-the-800-nm-semiconductor-laser-on-skin-blackheads-and-coarse-pores
#3
Jie Lin, Li Jing, Hao Zhu, Fu-Sheng Dong
The aim of the study was to determine the mechanism of action of the 800 nm semiconductor laser on skin blackheads and coarse pores. A total of 24 healthy purebred short-haired male guinea pigs, weighing 350-400 g, were selected and smeared with 0.5 ml coal tar suspension evenly by injector once daily. Treatment was continued for 14 days to form an experimental area of 8×3 cm on the back of the guinea pigs. The animals were divided into the following groups: Normal control group (NC), low-dose laser treatment group (L-LS), high-dose laser treatment group (H-LS), and Q-switched Nd:YAG treatment group (QC)...
January 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28427990/neuropeptide-y-not-involved-in-cutaneous-vascular-control-in-young-human-females-taking-oral-contraceptive-hormones
#4
Gary J Hodges, Zachary T Martin, Andrew T Del Pozzi
We previously reported that the cutaneous vasodilator response to local warming in males required noradrenaline (NA) and neuropeptide-Y (NPY). Animal work has shown no role for NPY in female vascular control. We investigated the contribution of NA and NPY in human female cutaneous vascular control. Nine female and nine male participants volunteered. To elucidate whether synthetic oestrogen and progesterone altered cutaneous vascular responses, females were tested in high-hormone (HH) and low-hormone (LH) phases of oral contraceptive pill (OCP)...
April 18, 2017: Microvascular Research
https://www.readbyqxmd.com/read/28422819/gnaq-tt-695-694-gc-polymorphism-is-associated-with-increased-gq-expression-vascular-reactivity-and-myocardial-injury-after-coronary-artery-bypass-surgery
#5
Ulrich H Frey, Stefanie Klenke, Anna Mitchell, Tim Knüfermann, Heinz Jakob, Matthias Thielmann, Winfried Siffert, Jürgen Peters
BACKGROUND: Angiotensin II receptor type 1-mediated activation of the α-subunit of the heterotrimeric Gq protein evokes increased vasoconstriction and may promote hypertrophy-induced myocardial damage. The authors recently identified a TT(-695/-694)GC polymorphism in the human Gq promoter, the GC allele being associated with an increased prevalence of cardiac hypertrophy. In this article, the authors tested whether the TT(-695/-694)GC polymorphism is associated with differences in (1) myocardial Gq protein expression, (2) vascular reactivity, and (3) myocardial damage after coronary artery bypass grafting...
April 19, 2017: Anesthesiology
https://www.readbyqxmd.com/read/28419120/structural-and-functional-changes-in-the-microcirculation-of-lepromatous-leprosy-patients-observation-using-orthogonal-polarization-spectral-imaging-and-laser-doppler-flowmetry-iontophoresis
#6
Curt Treu, Maria das Graças Coelho de Souza, Omar Lupi, Fernando Lencastre Sicuro, Priscila Alves Maranhão, Luiz Guilherme Kraemer-Aguiar, Eliete Bouskela
Leprosy is a chronic granulomatous infection of skin and peripheral nerves caused by Mycobacterium leprae and is considered the main infectious cause of disability worldwide. Despite the several studies regarding leprosy, little is known about its effects on microvascular structure and function in vivo. Thus, we have aimed to compare skin capillary structure and functional density, cutaneous vasomotion (spontaneous oscillations of arteriolar diameter), which ensures optimal blood flow distribution to skin capillaries) and cutaneous microvascular blood flow and reactivity between ten men with lepromatous leprosy (without any other comorbidity) and ten age- and gender-matched healthy controls...
2017: PloS One
https://www.readbyqxmd.com/read/28418107/a-new-path-in-defining-light-parameters-for-hair-growth-discovery-and-modulation-of-photoreceptors-in-human-hair-follicle
#7
Serena Buscone, Andrei N Mardaryev, Bianca Raafs, Jan W Bikker, Carsten Sticht, Norbert Gretz, Nilofer Farjo, Natallia E Uzunbajakava, Natalia V Botchkareva
BACKGROUND AND OBJECTIVE: Though devices for hair growth based on low levels of light have shown encouraging results, further improvements of their efficacy is impeded by a lack of knowledge on the exact molecular targets that mediate physiological response in skin and hair follicle. The aim of this study was to investigate the expression of selected light-sensitive receptors in the human hair follicle and to study the impact of UV-free blue light on hair growth ex vivo. MATERIAL AND METHODS: The expression of Opsin receptors in human skin and hair follicles has been characterized using RT-qPCR and immunofluorescence approaches...
April 18, 2017: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/28418076/ultrasonic-modulation-of-tissue-optical-properties-in-ex-vivo-porcine-skin-to-improve-transmitted-transdermal-laser-intensity
#8
Paul J D Whiteside, Chenxi Qian, Nicholas Golda, Heather K Hunt
BACKGROUND AND OBJECTIVE: Applications of light-based energy devices involving optical targets within the dermis frequently experience negative side-effects resultant from surface scattering and excess optical absorption by epidermal melanin. As a broadband optical absorber, melanin decreases the efficacy of light-based treatments throughout the ultraviolet, visible, and near-infrared spectra while also generating additional heat within the surface tissue that can lead to inflammation or tissue damage...
April 18, 2017: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/28417584/ir-spectroscopy-of-skin-in%C3%A2-vivo-optimal-skin-sites-and-properties-for-non-invasive-glucose-measurement-by-photoacoustic-and-photothermal-spectroscopy
#9
Alexander Bauer, Otto Hertzberg, Arne Küderle, Dominik Strobel, Miguel A Pleitez, Werner Mäntele
We have reported two methods to analyze glucose in the interstitial fluid of skin based on mid-infrared excitation with a tunable quantum cascade laser and photoacoustic or photothermal detection. These methods were evaluated for optimum skin locations to obtain reproducible glucose information. The lower part of the arm, the hypothenar, the tips of the index finger and the thumb were tested. The thumb appears to be the optimal skin location, followed by the index finger. Basic requirements for an optimum site are good capillary blood perfusion, low Stratum corneum thickness and the absence of fat layers...
April 18, 2017: Journal of Biophotonics
https://www.readbyqxmd.com/read/28414721/a-novel-smart-navigation-system-for-intramedullary-nailing-in-orthopedic-surgery
#10
Jaesuk Choi, Jihun Kim, Jae Youn Hwang, Minkyu Je, Jun-Young Kim, Shin-Yoon Kim
This paper proposes a novel smart surgical navigation system for intramedullary nailing in orthopedic surgery. Using a handle-integrated laser guidance module, the system can target a drill insertion point onto skin, indicating an accurate target position to perpendicularly access an invisible distal hole. The proposed handle-integration-based fixation of the laser guidance module precisely defines the relative position of the module with respect to the distal hole. Consequently, unlike conventional systems, the proposed system can indicate the target insertion point without any help from bulky and costly external position-tracking equipment that is usually required for compensating disturbances generated by external impacts...
2017: PloS One
https://www.readbyqxmd.com/read/28411641/nanoarmoring-of-proteins-by-conjugation-to-block-copolymer-micelles
#11
Nisaraporn Suthiwangcharoen, Ramanathan Nagarajan
The creation of polymer nanoparticles with protein functionality is of great interest to many applications such as targeted drug or gene delivery, diagnostic imaging, cancer theranostics, delivery of protein therapeutics, sensing chemical and biomolecular analytes in complex environments, and design of protective clothing resembling a second skin. Many approaches to achieving this goal are being explored in the current literature. In this chapter, we describe a relatively simple and flexible approach of conjugating the protein to an amphiphilic block copolymer and creating polymer nanoparticles with protein functionality by taking advantage of the intrinsic self-assembly behavior of the amphiphilic block copolymer...
2017: Methods in Enzymology
https://www.readbyqxmd.com/read/28410842/evidence-of-impaired-microvascular-dilatation-in-preterms-with-acute-respiratory-distress-syndrome
#12
Stefania Troiani, Andrea Cardona, Maddalena Milioni, Debora Monacelli, Alberto Verrotti, Marta Gehring, Giuseppe Ambrosio
BACKGROUND: Evaluating microcirculatory function in severely ill neonates is a relevant, unmet clinical need. Inappropriate peripheral microvascular vasodilatation is thought to contribute to cardiovascular alterations in preterm infants with acute respiratory distress syndrome (ARDS). We directly evaluated microcirculatory function in preterms with ARDS. METHODS: Peripheral microvascular function was assessed in 50 newborns, divided in three groups: preterms with ARDS; at-term newborns with mild-moderate congenital cardiac disease (Cardio group); healthy controls...
April 6, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28409937/spatial-and-temporal-localization-of-flavonoid-metabolites-in-strawberry-fruit-fragaria-%C3%A3-ananassa
#13
Anna Christina Crecelius, Dirk Hoelscher, Thomas Hoffmann, Bernd Schneider, Thilo C Fischer, Magda-Viola Hanke, Henry Flachowsky, Wilfried Schwab, Ulrich S Schubert
Flavonoids are important metabolites in strawberries (Fragaria × ananassa), since they accomplish an extensive collection of physiological functions and are valuable for human health. However, their localization within the fruit tissue has not been extensively explored. Matrix-assisted laser desorption/ionization mass spectrometric imaging (MALDI-MSI) was employed to shed light on the spatial distribution of flavonoids during fruit development. One wild-type (WT) and two transgenic lines were compared, where in the transgenics enzymes anthocyanidin reductase (ANRi) and flavonol synthase (FLSi), respectively were down-regulated using an RNAi based silencing approach...
April 14, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28403265/improvement-of-atrophic-acne-scars-in-skin-of-color-using-topical-synthetic-epidermal-growth-factor-egf-serum-a-pilot-study
#14
Marie Alexia Stoddard, Jennifer Herrmann, Lauren Moy, Ronald Moy
<p>BACKGROUND: Atrophic scarring in skin of color is a common, permanent, and distressing result of uncontrolled acne vulgaris. Ablative lasers and chemical peels are frequently used to improve the appearance of atrophic scars, primarily through the stimulation of collagen and elastin; however, these treatment modalities are associated with risks, such as dyspigmentation and hypertrophic scarring, especially in patients with darker skin.</p> <p>OBJECTIVE: We evaluated the efficacy of topically applied synthetic epidermal growth factor (EGF) serum in reducing the appearance of atrophic acne scars in skin of color...
April 1, 2017: Journal of Drugs in Dermatology: JDD
https://www.readbyqxmd.com/read/28399196/combined-use-of-laser-doppler-flowmetry-and-skin-thermometry-for-functional-diagnostics-of-intradermal-finger-vessels
#15
Evgeny A Zherebtsov, Angelina I Zherebtsova, Alexander Doronin, Andrey V Dunaev, Konstantin V Podmasteryev, Alexander Bykov, Igor Meglinski
No abstract text is available yet for this article.
April 1, 2017: Journal of Biomedical Optics
https://www.readbyqxmd.com/read/28398430/successful-treatment-of-ota-nevus-with-the-532-nm-solid-state-picosecond-laser
#16
Kimberly Jerdan, Jeffrey Ts Hsu, Emily Schnurstein
Laser treatment of Ota nevi can be complicated, particularly in darker skin types, as there is a higher risk for adverse effects if the laser is not carefully employed. We report a case of successful treatment of an Ota nevus in a patient with Fitzpatrick skin type IV with the novel 532-nm solid-state picosecond laser after 2 treatments.
March 2017: Cutis; Cutaneous Medicine for the Practitioner
https://www.readbyqxmd.com/read/28397660/-dermatologic-laser-surgery
#17
Lene Hedelund, Berit C Carlsen, Hans Bredsted Lomholt, Susanne Vissing, Merete Hædersdal
In this article we give an overview of which skin conditions that are currently treated with laser and explains the basic principles of treatment. In addition, we summarize recommendations of the Danish Dermatological Society for demarcation of medical treatments which can be provided free of charge from cosmetic self-payment treatments.
February 20, 2017: Ugeskrift for Laeger
https://www.readbyqxmd.com/read/28397320/pregnancy-associated-plasma-protein-a-is-positively-correlated-to-first-trimester-skin-microvascular-reactivity
#18
C Iacobaeus, T Kahan, G Jörneskog, K Bremme, E Andolf, M Thorsell
OBJECTIVE: To investigate if there is a correlation between levels of circulating maternal pregnancy-associated plasma protein A (PAPP-A) and first trimester maternal vascular function. METHODS: A cross-sectional study of 53 healthy non-smoking, pregnant, nulliparous women in Stockholm, Sweden. PAPP-A and vascular function were assessed during gestational week 11-14. Forearm skin microcirculation was investigated by laser Doppler perfusion imaging during iontophoresis of acetylcholine (ACh) and sodium nitroprusside (SNP) to assess endothelium dependent and endothelium independent microvascular vasodilatation, respectively...
April 11, 2017: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28394665/comparison-of-q-switched-nd-yag-laser-alone-versus-its-combination-with-ultra-pulse-co2-laser-for-the-treatment-of-black-tattoo
#19
Mithila Vanarase, Ram Krishan Gautam, Pooja Arora, Sonali Bajaj, Neha Meena, Ananta Khurana
BACKGROUND: Q-switched lasers are conventionally used for the treatment of black tattoo. However they require multiple sittings and the response may be slow due to competing epidermal pigment in dark skin. OBJECTIVE: To compare the efficacy of Q Switched Nd:YAG laser alone with its combination with ultrapulse CO2 in black tattoo removal. MATERIALS AND METHODS: Sixty patients of black tattoo were randomized into two groups. Group A was treated with QS Nd:YAG laser (1064 nm) alone and group B received combination of ablative ultrapulse CO2 followed by fixed dose QS Nd:YAG laser (1064 nm), at 6 weeks interval for a maximum of 6 sittings...
April 10, 2017: Journal of Cosmetic and Laser Therapy: Official Publication of the European Society for Laser Dermatology
https://www.readbyqxmd.com/read/28388282/combined-pulsed-dye-laser-and-fiberoptic-nd-yag-laser-for-the-treatment-of-hypertrophic-port-wine-stain
#20
Mohammed Radmanesh, Ramin Radmanesh
The hypertrophic port wine stain (PWS) is only partially and superficially treated with the Pulsed dye laser(PDL) because of its limited depth of penetration. We used combined PDL and fiberoptic 1444nm Nd-YAG laser to treat a case with hypertrophic PWS. METHOD: After tumescent anesthesia, few holes were made by a 16 gauge needle on different sides of the lesion. The fiberoptic tip was of 1444nm Nd-YAG laser was inserted within the holes and was pushed forward while triggering. In a fan pattern and by a back and forth movement, the subcutaneous and deep dermal areas were coagulated...
April 7, 2017: Journal of Cosmetic and Laser Therapy: Official Publication of the European Society for Laser Dermatology
keyword
keyword
96898
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"