This Article Abstract Full Text Full Text (PDF) Services Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Kotre, C J Articles by Guibelalde, E Search for Related Content PubMed PubMed Citation Articles by Kotre, C J Articles by Guibelalde, E

Optimization of variable temporal averaging in digital fluoroscopy

¹ Regional Medical Physics Department, Newcastle General Hospital, Newcastle-upon-Tyne NE4 6BE, UK and ² Department of Radiology (Medical Physics), School of Medicine, Complutense University of Madrid, 28040 Madrid, Spain

View larger version (18K): [in a new window]   Figure 1. An example of the threshold contrast results obtained against frame averaging time constant, for a range of speeds. This example is for the 11.1 mm disk diameter. The illustrative error bar represents a standard deviation of 16% on each observation.

View larger version (14K): [in a new window]   Figure 2. Illustration of the method for deriving the optimum frame averaging time constant. This example is for the 11.1 mm disk diameter moving at 20 mm s–1. The solid arrow shows the minimum of the curve, taken as the optimum time constant. The curved dashed lines indicate an estimate of the standard error about the cubic curve fit. The resulting estimate of standard error on the optimum time constant is shown by the horizontal error bar.

View larger version (17K): [in a new window]   Figure 3. The experimentally derived optimum persistence time constant as a function of disk diameter for speeds of (a) 6.25 mm s–1, (b) 12.5 mm s–1, (c) 20 mm s–1, (d) 40 mm s–1 and (e) 75 mm s–1. The illustrative error bar represents an average standard error estimate for each point.