dcemriS4 (version 0.55)

rCBV.fast: Regional Cerebral Blood Volume

Description

Quantification of relative cerebral blood volume (rCBV) using the first pass from a bolus injection of a contrast agent.

Usage

rCBV.fast(signal, ...)
# S4 method for array
rCBV.fast(signal, mask, aif, time, multicore = FALSE,
  verbose = FALSE)
rCBV(Ct, Ca, time, Hf = 1, rho = 1)

Arguments

signal

is a multidimensional array of signal intensities (or concentrations). The last dimension is assumed to be a function of the acquisition times, while the previous dimenions are assued to be spatial.

...

Additional variables defined by the method.

mask

is a (logical) multidimensional array that identifies the voxels to be analyzed.

aif

Arterial Input Function.

time

is the vector of acquisition times associated with the dynamic data.

multicore

is a logical variable (default = FALSE) that allows parallel processing via parallel.

verbose

is a logical variable (default = FALSE) that allows text-based feedback during execution of the function.

Ct

is the time series of contrast agent concentration in tissue.

Ca

is the time series of contrast agent concentration in the blood.

Hf

is the hematocrit factor.

rho

is the density of brain tissue.

Value

A nifti object containing the estimates of regional cerebral blood volume (rCBV).