R/glrlm_all.R

Defines functions glrlm_all

Documented in glrlm_all

#' @title Creates gray-level run length matrix of all possible directions of a RIA image
#' @export
#'
#' @description  Creates gray-level run length matrix (GLRLM) from \emph{RIA_image}.
#' GLRLM assesses the spatial relation of voxels to each other by investigating how many times
#' same value voxels occur next to each other in a given direction. While the \code{\link[RIA]{glrlm}}
#' function calculates the GLRLM in one given direction, the \code{\link[RIA]{glrlm_all}} function
#' simultaneously calculates all GLRLMs in all possible directions. 
#' For 3D datasets, this means GLCMs will be calculated for all 13 different directions.
#' In case of 2D datasets, only 4 are returned by default.
#' By default the \emph{use_type} is set to \emph{discretize}, therefore GLRLMs will be calculated
#' for all discretized images in all directions. Also \emph{single} data processing is supported, 
#' then by default the image in the \emph{$modif} slot will be used. If \emph{use_slot} is given,
#' then the data present in \emph{RIA_image$use_slot} will be used for calculations.
#' Results will be saved into the \emph{glrlm} slot. The name of the subslot is automatically
#' generated by RIA.
#'
#' @param RIA_data_in \emph{RIA_image}.
#' 
#' @param use_type string, can be \emph{"single"} which runs the function on a single image,
#' which is determined using \emph{"use_orig"} or \emph{"use_slot"}. \emph{"discretized"}
#' takes all datasets in the \emph{RIA_image$discretized} slot and runs the analysis on them.
#'
#' @param use_orig logical, indicating to use image present in \emph{RIA_data$orig}.
#' If FALSE, the modified image will be used stored in \emph{RIA_data$modif}.
#'
#' @param use_slot string, name of slot where data wished to be used is. Use if the desired image
#' is not in the \emph{data$orig} or \emph{data$modif} slot of the \emph{RIA_image}. For example,
#' if the desired dataset is in \emph{RIA_image$discretized$ep_4}, then \emph{use_slot} should be
#' \emph{discretized$ep_4}. The results are automatically saved. If the results are not saved to
#' the desired slot, then please use \emph{save_name} parameter.
#'
#' @param save_name string, indicating the name of subslot of \emph{$glcm} to save results to.
#' If left empty, then it will be automatically determined by RIA.
#'
#' @param verbose_in logical indicating whether to print detailed information.
#' Most prints can also be suppressed using the \code{\link{suppressMessages}} function.
#'
#' @return \emph{RIA_image} containing the GLRLMs.
#'
#' @examples \dontrun{
#' #Discretize loaded image and then calculate GLRLM matrix of RIA_image$modif
#' RIA_image <- discretize(RIA_image, bins_in = c(4, 8), equal_prob = TRUE,
#' use_orig = TRUE, write_orig = FALSE)
#' RIA_image <- glrlm_all(RIA_image, use_type = "single")
#'
#' #Use use_slot parameter to set which image to use
#' RIA_image <- glrlm_all(RIA_image, use_type = "single",
#' use_orig = FALSE, use_slot = "discretized$ep_4")
#' 
#' #Batch calculation of GLCM matrices on all disretized images
#' RIA_image <- glrlm_all(RIA_image)
#' }
#' @references Márton KOLOSSVÁRY et al.
#' Radiomic Features Are Superior to Conventional Quantitative Computed Tomographic
#' Metrics to Identify Coronary Plaques With Napkin-Ring Sign
#' Circulation: Cardiovascular Imaging (2017).
#' DOI: 10.1161/circimaging.117.006843
#' \url{https://www.ncbi.nlm.nih.gov/pubmed/29233836}
#' 
#' Márton KOLOSSVÁRY et al.
#' Cardiac Computed Tomography Radiomics: A Comprehensive Review on Radiomic Techniques.
#' Journal of Thoracic Imaging (2018).
#' DOI: 10.1097/RTI.0000000000000268
#' \url{https://www.ncbi.nlm.nih.gov/pubmed/28346329}
#' @encoding UTF-8
#' 

glrlm_all <- function(RIA_data_in, use_type = "discretized", use_orig = FALSE, use_slot = NULL, save_name = NULL, verbose_in = TRUE)
{
    if(!any(class(RIA_data_in) == "RIA_image")) {message("PROCESSING OF RIA_image OBJECTS ARE SUPPORTED, OTHER CLASSES MIGHT CAUSE PROBLEMS! PLEASE LOAD DATA USING load_dicom")}
    
    if(dim(RIA_data_in$data$orig)[3] == 1) {
        dim_image <- 2
    } else {dim_image <- 3}
    
    if(dim_image == 3)  {
        offsets <- matrix(c( 1, 0, 0,
                             0, 1, 0,
                             1, 1, 0,
                             1,-1, 0,
                             
                             1, 0, 1,
                             0, 1, 1,
                             1, 1, 1,
                             1,-1, 1,
                             
                             1, 0,-1,
                             0, 1,-1,
                             1, 1,-1,
                             1,-1,-1,
                             
                             0, 0, 1
        ), nrow = 13, ncol = 3, byrow = TRUE)
    }
    
    if(dim_image == 2)  {
        offsets <- matrix(c(1, 0, 0,
                            0, 1, 0,
                            1, 1, 0,
                            1,-1, 0
        ), nrow = 4, ncol = 3, byrow = TRUE)
    }
    
    if(!is.null(save_name) & (dim(offsets)[1] != length(save_name))) {stop(paste0("PLEASE PROVIDE THE SAME NUMBER OF NAMES AS THERE ARE IMAGES!\n",
                                                                                  "NUMBER OF NAMES:  ", length(save_name), "\n",
                                                                                  "NUMBER OF IMAGES: ", dim(offsets)[1], "\n"))
    }
    
    for (i in 1: dim(offsets)[1])
    {
        RIA_data_in <- glrlm(RIA_data_in, off_right = offsets[i,1], off_down = offsets[i,2], off_z = offsets[i,3],
                            use_type = use_type, use_orig = use_orig, use_slot = use_slot, save_name = save_name[i], verbose_in = verbose_in)
    }
    
    return(RIA_data_in)
    
}

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RIA documentation built on July 2, 2018, 1:04 a.m.