exposure index


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exposure index

A relative value indicating the quantity of ionizing radiation received by a digital radiographic image receptor. Although vendors currently use many kinds of exposure indices, e.g., Sensitivity Numbers, standardization is being developed by physicists' organizations.
See also: index
References in periodicals archive ?
The correlation between the mobile phone use information, which was obtained from the self-reported questionnaire, and exposure index recorded by the PEM was poor, whereas that between the information from the operators' log data and exposure index for transmission of mobile communication was fair.
Exposure index Percentage 1968 22 1980 36 1988 36 2000 31 2012 27 (1b) Yet school segregation, as measured by dissimilarity between the racial makeup of schools and the overall student population, declined throughout this period.
There was, in fact, evidence of multicollineary with both the Latino poverty rate and the neighborhood poverty exposure index in the model (with variance inflation factors of 6.5 or greater for both variables).
Table 4 shows the polytomous logistic regression between vitamin D status and blood pressure classification, both unadjusted and after adjusting for age, sex, and BMI as well as after adjusting for age, sex, BMI, total vitamin D intake, and solar exposure index. No significant associations were found between vitamin D status and blood pressure classification after adjusting for these variables.
The personal exposure index [[epsilon].sub.exp] is 0.7 when the distance between the manikins is equal to or larger than 1.2 m, but is reduced to 0.5 ([c.sub.exp]]/[c.sub.R] ~ 2) when the distance is 0.4 m.
As well, the exposure index was computed several times using different numbers of lines to determine the minimum number of lines that could be used with the most consistent results.
The level of protection of the target manikin is expressed by the personal exposure index:
Here, much like the advertisement exposure index, we summed the number of correct responses to create a knowledge index ranging from 0 to 8.
Youthful respondents who were low in exposure to political media had a mean Knowledge of Current Events Index score of 1.2 (s = 1.0 [N = 77]), compared with a mean of 1.7 (s = 1.1 [N = 277]) for those who were medium on the Political Media Exposure Index, and an average of 2.3 (s = 1.2 [N = 51]) for those who were high on the Political Media Exposure Index.
[Z.sub.m] is a vector of MSA characteristics expected to influence local labor market outcomes, and [E.sub.rm] is the exposure index described in Equation (1).
The overall exposure index was significantly higher for students in live workshop districts.