We announce here the public availability of the Edinburgh/Durham Southern Galaxy Catalogue (EDSGC, http://www.edsgc.org). This objective galaxy catalogue was constructed using the COSMOS micro-densitometer at the Royal Observatory Edinburgh and constitutes one of the largest digitized galaxy surveys currently in existence. The EDSGC contains a total of 1,495,877 galaxies (each with 27 image par...

The aim of this study was to investigate the radiation exposure of the hands and thyroid glands of orthopaedic surgeon and assistant during procedures involving percutaneous wiring of the hand and wrist. The radiation dose to the hand and thyroid glands was prospectively studied from a total of 30 percutaneous hand and wrist procedures. Four thermolucent densitometers were used to measure the r...

Specimensof serum were collected from 198 clinically healthy persons,chosento provide approximately 10 males and 10 females in each decade up to the tenth. After electrophoretic separationusing the Spincomethod B, the strips were stained by the periodicacid-Schiff reactionaccordingto K#{246}iw and Gr#{246}nwall (Scand. J. Clin. Lab. Invest. 4, 244, 1952) and scannedon the Analytrol integrating ...

The authors have studied the feasibility of using three new high-sensitivity radiochromic devices in measuring the doses to peripheral points outside the primary megavoltage photon beams. The three devices were GAFCHROMIC® EBT film, prototype Low Dose (LD) Film, and prototype LD Card. The authors performed point dosimetry using these three devices in water-equivalent solid phantoms at x = 3,5,8...

It was with interest that I read the article by Zhu et al., especially the part concerning the inherent variation of optical density across the film which the author concluded is likely due to a nonuniform dispersion of the radiochromic sensitive dye rather than an artifact of the scanning technique. I agree with the author on this point as we had performed the same examinations. However, we mu...

Background: The number of hip fractures during recent decades has been reported to be increasing, partly because of an increasing proportion of elderly women in the society. However, whether changes in hip fracture annual incidence in women are attributable to secular changes in the prevalence of osteoporosis is unclear. Methods: Bone mineral density was evaluated by single-photon absorptiometr...

Current diagnosis of bone loss and osteoporosis is based on the measurement of the Bone Mineral Density (BMD) or the apparent mass density. Unfortunately, in most clinical ultrasound densitometers: 1) measurements are often performed in a single anatomical direction, 2) only the first wave arriving to the ultrasound probe is characterized, and 3) the analysis of bone status is based on empirica...

PURPOSE. To estimate the normal value of macular pigment optical density (MPOD) in an adult south Indian sample. METHODS. Three hundred eyes of 161 healthy volunteers (30 men and 30 women in each of the age groups of 20-29, 30-39, 40-49, 50-59, and ≥60 years) underwent MPOD measurement with a macular densitometer. Thirty-two eyes were also checked for intersession variability. RESULTS. The mean...

Optic disk reflectance was measured from 27 normal observers with their physiological lenses (aged 21-74 yr) and from two pseudophakic observers (aged 69 and 70 yr) with use of a Utrecht fundus reflection densitometer. Psychophysical heterochromatic flicker photometric luminance matches (10 degrees field) were obtained on the same group of the observers. A four-parameter model incorporating len...