Inherent to the scanning procedure of the OCT-Ophthalmoscope, using a curved fan ray equivalent to the curvature of the eye, there is some distortion at the borders of both parts of OCT C-scan relative to the centre of the images.
For United fan Ray, who went viral on the internet last week with a full-frontal video attack on beleaguered manager David Moyes, this season has been less an opportunity than a series of bloody nightmares.
Cats were placed in ventral recumbency and body composition was analyzed using a Hologic model QDR-4500 Fan Beam X-ray Bone Densitometer and software (Hologic Inc., Waltham, MA).
Micro computed tomography was performed using a cone beam scanner (μCT 20; SCANCO Medical, Brüttisellen, Switzerland) with a fixed x-ray fan beam of 7-μm spot size at 50 kVp and 160 mA.
Our study used the Chinese Mini Mental State Examination (C-MMSE) [ 23, 24] to assess the patient recognition function and the Fan Beam X-ray Bone Densitometer to assess bone density.
The X-ray source moving beneath the subject emits a pencil beam or fan beam of X-rays at two energy levels, typically 40/70 or 43/110 keV (depending on the manufacturer), which allow algorithms for the quantification of two distinct tissue types.
BMD (g/cm) at the posteroanterior (PA) L2-4 lumbar spine (LS); PA femoral neck (FN); dominant arm distal radius; TB and body composition (lean and fat mass) were measured by dual-energy X-ray absorptiometry (fan beam, Lunar DPX-L series GE Medical systems, Lunar Madison, Wisconsin, USA).
Areal bone mineral density was measured for the total hip and spine by using fan beam dual energy x ray absorptiometry (QDR 4500W, Hologic, Bedford, MA) at all study sites.
Body fat (percent fat) was measured annually from 7 years by dual-energy X-ray absorptiometry (Lunar Prodigy Advanced fan beam system; Lunar Corporation, Madison, WI).
It is, however, often much more convenient to regard an object point as emitting fans of rays, the rays being straight lines everywhere perpendicular to the waves.
The objective collects a fan of rays from each object point and images the ray bundle at the front focal plane of the eyepiece.
