cmr.local {cmR}

Spline analysis of cardiovascular magnetic resonance imaging

Description

Spline analysis of cardiovascular magnetic resonance imaging

Usage

cmr.local(data, mask, input, quantiles = c(0.25, 0.75), cores = 1)

Arguments

data

3d array of CMR signal

mask

2d array of mask. Voxel with 0 or FALSE will be omitted from analysis

input

input function

quantiles

quantiles used for credible interval, default: c(0.25, 0.75)

cores

number of cores to use in parallel computing

Value

list of mbf (point estimation) and ci (credible interval)

Examples

oldpar <- par(no.readonly = TRUE)
 library(cmR)
 data(cmrsim)
 local.mbf=local.ci=array(NA,c(30,30,3))
 for (i in 1:3){
  mask=array(NA,c(30,30))
  mask[cmrdata_sim[,,i,1]!=0]=1
  temp=cmr.local(cmrdata_sim[,,i,], mask, input_sim, cores=2)
  local.mbf[,,i]=t(as.matrix(temp$mbf))
  local.ci[,,i]=t(as.matrix(temp$ci))
 }
 par(mfrow=c(2,1))
 imageMBF(maxresp_sim, zlim=c(0,5))
 imageMBF(local.mbf, zlim=c(0,5))
 imageMBF(local.ci, zlim=c(0,0.8))
par(oldpar)