نتایج جستجو برای: Light penetration

تعداد نتایج: 430628  

Objectives: In this article, a new procedure for increasing the light penetration depth in a tissue is studied and simulated. It has been reported that the most important problem in biomedical optical imaging relates to the light penetration depth, and so this makes a dramatic restriction on its applications. In the optical imaging method, the detection of the backscattered pho...

Journal: :Journal of Experimental Biology 1934

Journal: :Journal of Geophysical Research 2008

2016
Jonathan Nylk Kaley McCluskey Sanya Aggarwal Javier A. Tello Kishan Dholakia

We have investigated the effect of Airy illumination on the image quality and depth penetration of digitally scanned light-sheet microscopy in turbid neural tissue. We used Fourier analysis of images acquired using Gaussian and Airy light-sheets to assess their respective image quality versus penetration into the tissue. We observed a three-fold average improvement in image quality at 50 μm dep...

Journal: :Journal of Dairy Science 1955

Journal: :Lasers in surgery and medicine 2015
Clark E Tedford Scott DeLapp Steven Jacques Juanita Anders

BACKGROUND AND OBJECTIVE Photobiomodulation (PBM) also known as low-level light therapy has been used successfully for the treatment of injury and disease of the nervous system. The use of PBM to treat injury and diseases of the brain requires an in-depth understanding of light propagation through tissues including scalp, skull, meninges, and brain. This study investigated the light penetration...

Journal: :Plant physiology 1978
J T Woolley E W Stoller

Light penetration through a Drummer silty clay loam and a Broomfield sand was measured spectrophotometrically and biologically. The spectrophotometric measurements showed that less than 1% of the incident light penetrated 2.2 millimeters at any wavelength between 350 and 780 nanometers for ped sizes up to 1 millimeter. Biological measurements with light-sensitive lettuce (Lactuca sativa) seeds ...

Journal: :Journal of biomedical optics 2011
Caroline M Moore C Alexander Mosse Clare Allen Heather Payne Mark Emberton Stephen G Bown

Photodynamic therapy (PDT) is being investigated as a treatment for localized prostate cancer. Photodynamic therapy uses a photosensitizing drug which is activated by a specific wavelength of light, in the presence of oxygen. The activated drug reacts with tissue oxygen to produce reactive oxygen species which are responsible for localized tissue necrosis. One of the determinants of the PDT eff...

2002
Mark J. Brush Scott W. Nixon

Declines in the seagrass Zostera marina L. in estuaries and lagoons have been attributed in part to reductions in irradiance reaching the seagrass blades. Epiphytes growing on Z. marina have the potential to attenuate a large fraction of the light that would otherwise reach the blades. This problem has previously been studied by measuring light penetration through homogenized epiphytic slurries...

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