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Returns the ROC and AFROC AUCs corresponding to
specified RSM parameters. See also UtilAucPROPROC
,
UtilAucBinormal
and UtilAucCBM
UtilAucsRSM(mu, lambdaP, nuP, lesDistr)
The mean(s) of the Gaussian distribution(s) for the ratings of latent LLs (continuous ratings of lesions that are found by the search mechanism)
The Poisson distribution parameter(s), which describes the random number of latent NLs (suspicious regions that do not correspond to actual lesions) per case; these are the physical parameters.
The physical nuP
parameters, each of which is
the success probability of the binomial distribution(s) describing
the random number of latent LLs (suspicious regions that correspond
to actual lesions) per diseased case.
A list containing the ROC and AFROC AUCs corresponding to the specified parameters
The RSM parameters (mu
, lambdaP
and
nuP
) can be vectors, provided they are of the same length;
the first parameter of each array is used, followed by the second,
etc; a common lesion distribution is assumed.
Chakraborty DP (2017) Observer Performance Methods for Diagnostic Imaging - Foundations, Modeling, and Applications with R-Based Examples, CRC Press, Boca Raton, FL. https://www.crcpress.com/Observer-Performance-Methods-for-Diagnostic-Imaging-Foundations-Modeling/Chakraborty/p/book/9781482214840
Chakraborty DP (2006) A search model and figure of merit for observer data acquired according to the free-response paradigm, Phys Med Biol 51, 3449-3462.
Chakraborty DP (2006) ROC Curves predicted by a model of visual search, Phys Med Biol 51, 3463--3482.
# NOT RUN {
mu <- 1;lambdaP <- 1;nuP <- 1
lesDistr <- rbind(c(1, 0.9), c(2, 0.1))
## i.e., 90% of dis. cases have one lesion, and 10% have two lesions
UtilAucsRSM(mu, lambdaP, nuP, lesDistr)$aucROC
UtilAucsRSM(mu, lambdaP, nuP, lesDistr)$aucAFROC
mu <- c(1,2);lambdaP <- c(1,0.5);nuP <- c(1, 0.8)
lesDistr <- rbind(c(1, 0.9), c(2, 0.1))
## i.e., 90% of dis. cases have one lesion, and 10% have two lesions
UtilAucsRSM(mu, lambdaP, nuP, lesDistr)$aucROC
UtilAucsRSM(mu, lambdaP, nuP, lesDistr)$aucAFROC
# }
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