Results 211 to 220 of about 508,325 (264)
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Cartilage thickness measurement in foals
Research in Veterinary Science, 1987The talus and proximal and distal epiphysis of the humerus, radius, femur, tibia and distal metacarpus of 20 foals aged 0 to 150 days were obtained at necropsy and sawn sagittally into slabs 4 to 8 mm thick. The thickness of the cartilage (articular cartilage and unossified epiphyseal cartilage) was measured in three to five places in each slab, using ...
E C, Firth, Y, Greydanus
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Accurate thickness measurement of graphene
Nanotechnology, 2016Graphene has emerged as a material with a vast variety of applications. The electronic, optical and mechanical properties of graphene are strongly influenced by the number of layers present in a sample. As a result, the dimensional characterization of graphene films is crucial, especially with the continued development of new synthesis methods and ...
Cameron J Shearer +4 more
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Corneal thickness measured by interferometry
Journal of the Optical Society of America, 1975An optical method for measuring the thickness of transparent structures has been developed, and has been used to measure, in vivo, the thickness of the human cornea. The thickness is measured by placing the anterior surface of the cornea at the focus of a beam of coherent laser light and then measuring the spacing between the interference fringes ...
D G, Green, B R, Frueh, J M, Shapiro
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In Vivo Choroidal Thickness Measurement
American Journal of Ophthalmology, 1979We developed a system that permits exceptionally accurate measurements of human choroidal thickness in vivo by means of ultrasound. With minicomputer techniques, the complementary functions of the time and spectral domains of reflected sound can be used to permit measurements accurate to less than 20 mu at 10 MHz center frequency.
D J, Coleman, F L, Lizzi
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Thickness Measurement of Hydrogel Lenses
Optometry and Vision Science, 1981Abstract The thickness of hydrogel lenses was measured in air with a Radiuscope and in saline with a specular microscope. The measurements are in good agreement, showing that drying is not a problem with air measurement. With a simple modification to the Radiuscope, the thickness measured is satisfactory for calculating optical power ...
G S, Wilson, E C, Erwin
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The Repeatability of Corneal Thickness Measures
Cornea, 2000To compare the repeatability of three measures of corneal thickness: Orbscan Slitscan pachymetry, ultrasound pachymetry, and optical pachymetry.Twenty normal subjects were tested on three occasions. Two occurred on the same day and the third was on a different day at approximately the same time of day as one of the first two visits.
M W, Marsich, M A, Bullimore
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Coating Thickness Measurement by Interferometry*
Journal of the Optical Society of America, 1947Thickness measurements of thin transparent coatings on thick transparent bases by reflection interferometry are made possible through use of an immersion medium of the same refractive index as the base to intensify interference. A convenient interferometer comprising three essential parts, a “pocket” spectroscope, an incandescent lamp, and a ...
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A simple technique for measurement of corneal thickness
Contact Lens and Anterior Eye, 1998Measurement of corneal thickness has potential benefit both in the fitting of contact lenses and in monitoring any pathology that could affect corneal thickness. Corneal thickness measurement is undertaken using an accessory to the biomicroscope, the optical pachometer, or by means of expensive apparatus such as the ultrasonic pachometer.
C, Albarrán +4 more
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Quantifying Breast Thickness for Density Measurement
2008The largest source of error in the estimation of volumetric breast density typically arises from inaccuracies in the measurement of breast thickness. We present a method which accounts for paddle tilt and show that the variation within the compressed breast region may be as much as 21.2mm in the chest wall to nipple direction.
Jennifer Diffey +5 more
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