fractal.Extr.threshold: Fractal features extractor from a folder based on threshold...
In kbolab/moddicom: Package for handling DICOM RT files

This function extracts fractal features from a folder using the threshold filter.

1 2	fractal.Extr.threshold(path, ROIName, fstPerc, lstPerc, ThDown, ThUp, ThStep, filename)

`path`	The path to be browsed for folders containing DICOM images and Structure Set of patients
`ROIName`	A `character` object containing the name(s) (as vector) of ROIs to be analyzed. If there is more than one ROI (multiple references) or no ROI is listed the analysis is stopped
`fstPerc`	A `numeric` value for normalized the image. It is the first percentile.
`lstPerc`	A `numeric` value for normalized the image. It is the last percentile.
`ThDown`	A `numeric` value for masked image filter. It is the minimum value of the threshold
`ThUp`	A `numeric` value for masked image filter. It is the maximum value of the threshold
`filename`	The Rdata file name saved locally during the running, by default 'Fractals.Rdata'.

## Not run: 
prova <- fractal.Extr.threshold(path = './Images', ROIName = 'GTV', fstPerc = 1, lstPerc = 99, 
ThDown = 0, ThUp = 100, ThStep = 50, filename = 'Fractals_Lung.Rdata')

## End(Not run)