Differences

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--- neuroimagen:neuro4.pm [2019/12/09 09:21]
osotolongo
+++ neuroimagen:neuro4.pm [2022/05/17 07:49] (current)
osotolongo [NEURO4]
@@ Line 3: / Line 3: @@
 Esta pagina es solo de referencia de los modulos Perl que dan soporte al pipeline de neuroimagen.
-===== NEURO4.pm =====
+<markdown>
+# NEURO4
-Subrutinas:
+This is a set of functions for helping in the pipeline
-  * sub print_help -> Imprime la ayuda de un script, tomandola del directorio //docs//
-  * sub escape_name -> Escapa caracteres molestos de los nombres de directorio
-  * sub trim -> Elimina espacios, antes y despues de un string
-  * sub check_or_make -> crea un directorio si no existe
-  * sub load_project -> lee las variables de un proyecto dentro de un hash
-  * sub check_subj -> lee la estructura BIDS de un sujeto dentro de un hash
-  * sub check_fs_subj -> comprueba que un sujeto se haya procesado en FS
-  * sub get_lut ->
-  * sub run_dckey -> corre //dckey// sobre un DICOM y saca el valor de un tag
-  * sub dclokey -> devuelve el valor de un tag oculto en un DICOM
-  * sub centiloid_fbb -> devuelve el valor de Centiloide para un valor de SUVR en FBB
-  * sub populate -> Lee un archivo de CSV (o texto plano) y devuelve un hash con los valores, segun el patron que se suministra
-  * sub get_subjects -> Devuelve un array con los sujetos de un proyecto contenidos en un archivo de DB del proyecto
-  * sub get_list -> Devuelve un array con los sujetos de un proyecto contenidos, ignora el formato posterior a los primero 4 numeros
-  * sub get_pair -> devuelve un hash que contiene una DB de proyecto
-  * sub shit_done -> Envia un email con un archivo comprimido de attachment
-  * sub cut_shit -> Tomando como argumentos la DB de un proyecto y una lista simple de sujetos, devuelve un array con los sujetos de la lista incluidos en el proyecto.
+- print\_help
-<code perl NEURO4.pm>
+    just print the help
-#!/usr/bin/perl
-use strict; use warnings;
+    this funtions reads the path of a TXT file and print it at STDOUT
-package NEURO4;
-require Exporter;
-use File::Slurp qw(read_file);
-use File::Find::Rule;
-use Mail::Sender;
-use MIME::Lite;
-use File::Basename qw(basename);
-our @ISA                = qw(Exporter);
+    usage:
-our @EXPORT             = qw(print_help load_project cut_shit);
-our @EXPORT_OK  = qw(print_help escape_name trim check_or_make load_project populate get_subjects check_subj check_fs_subj get_list shit_donei get_pair cut_shit);
-our %EXPORT_TAGS        = (all => [qw(print_help escape_name trim check_or_make load_project check_subj check_fs_subj get_lut run_dckey dclokey centiloid_fbb populate get_subjects get_list shit_done get_pair cut_shit)],
-                                        usual => [qw(print_help load_project check_or_make cut_shit)],);
-our $VERSION    = 1.0;
-sub print_help {
+            print_help(help_file);
-# just print the help
-        my $hlp = shift;
-        open HELP, "<$hlp";
-        while(<HELP>){
-                print;
-        }
-        close HELP;
-        return;
-}
-sub trim {
+- escape\_name
-        my $string = shift;
-        $string =~ s/^\s+//;  #trim leading space
-        $string =~ s/\s+$//;  #trim trailing space
-        return $string;
-}
-sub check_or_make {
+    This function takes a string and remove some especial characters
-        my $place = shift;
+    in order to escape directory names with a lot of strange symbols.
-        # I must check if directory exist, else I create it.
-        if(opendir(TEST, $place)){
-        closedir TEST;
-        }else{
-                mkdir $place;
-        }
-}
-sub load_project {
+    It returns the escaped string
-        my $study = shift;
-        my %stdenv = map {/(.*) = (.*)/; $1=>$2 } read_file $ENV{HOME}."/.config/neuro/".$study.".cfg";
-        return %stdenv;
-}
-sub check_subj {
+    usage:
-        my $proj_path = shift;
-        my $subj = shift;
-        my %mri = ('T1w' => 0, 'T2w' => 0, 'dwi' => 0, 'dwi_sbref' => 0);
-        my $subj_dir = $proj_path.'/bids/sub-'.$subj.'/anat';
-        if( -e $subj_dir && -d $subj_dir){
-                my @t1 = find(file => 'name' => "sub-$subj*_T1w.nii.gz", in =>  $subj_dir);
-                if (-e $t1[0] && -f $t1[0]){
-                        $mri{'T1w'} = $t1[0];
-                }
-                my @t2 = find(file => 'name' => "sub-$subj*_T2w.nii.gz", in =>  $subj_dir);
-                if (-e $t2[0] && -f $t2[0]){
-                        $mri{'T2w'} = $t2[0];
-                }
-        }
-        $subj_dir = $proj_path.'/bids/sub-'.$subj.'/dwi';
-        if( -e $subj_dir && -d $subj_dir){
-                my @dwi_sbref = find(file => 'name' => "sub-$subj*_sbref_dwi.nii.gz", in =>  $subj_dir);
-                if (-e $dwi_sbref[0] && -f $dwi_sbref[0]){
-                        $mri{'dwi_sbref'} = $dwi_sbref[0];
-                }
-                my @dwi = find(file => 'name' => "sub-$subj*_dwi.bval", in =>  $subj_dir);
-                if (-e $dwi[0] && -f $dwi[0]){
-                        ($mri{'dwi'} = $dwi[0]) =~ s/bval$/nii\.gz/;
-                }
-        }
-        return %mri;
-}
-sub check_fs_subj {
+            escape_name(string);
-        my $subj = shift;
-        my $subj_dir = qx/echo \$SUBJECTS_DIR/;
-        chomp($subj_dir);
-        my $place = $subj_dir."/".$subj;
-        my $ok = 0;
-        # I must check if directory exist.
-        if( -e $place && -d $place){$ok = 1;}
-        return $ok;
-}
-sub get_lut {
+- trim
-        my $ifile = shift;
-        my $patt = '\s*(\d{1,8})\s*([A-Z,a-z,\-,\_,\.,0-9]*)\s*.*';
-        my %aseg_data = map {/$patt/; $1=>$2} grep {/^$patt/} read_file $ifile;
-        return %aseg_data;
-}
-sub run_dckey{
+    This function takes a string and remove any trailing spaces after and before the text
-        my @props = @_;
-        my $order = "dckey -k $props[1] $props[0] 2\>\&1";
-        print "$order\n";
-        my $dckey = qx/$order/;
-        chomp($dckey);
-        $dckey =~ s/\s*//g;
-        return $dckey;
-}
-sub dclokey{
+    usage:
-        my @props = @_;
-        my $order = "dcdump $props[0] 2\>\&1 \| grep \"".$props[1]."\"";
-        print "$order\n";
-        my $line = qx/$order/;
-        (my $dckey) = $line =~ /.*VR=<\w{2}>\s*VL=<0x\d{3,4}[a-z]*>\s*<(.*)\s*>/;
-        if($dckey){
-                $dckey =~ s/\s*//g;
-        }
-        return $dckey;
-}
-sub centiloid_fbb {
+            trim(string);
-    my $suvr = shift;
-    return 153.4*$suvr-154.9;
-}
-sub populate {
+- check\_or\_make
-        my $patt = shift;
-        my $csv = shift;
-        my %pdata = map { /^$patt$/; $1 => $2} grep {/^$patt$/} read_file $csv;
-        return %pdata;
-}
-sub get_subjects {
+    This is mostly helpless, just takes a path,
-        my $db = shift;
+    checks if exists and create it otherwise
-        my @slist = map {/^(\d{4});.*$/; $1} grep { /^\d{4}/ } read_file($db, chomp => 1);
-        return @slist;
-}
-sub get_list {
+    usage:
-        my $ifile = shift;
-        my @slist = map {/^(\d{4}).*$/; $1} grep { /^\d{4}/ }read_file($ifile, chomp => 1);
-        return @slist;
-}
-sub get_pair {
+            check_or_make(path);
-        my $ifile = shift;
-        my %pet_data = map {/(.*);(.*)/; $1=>$2} read_file $ifile;
-        return %pet_data;
-}
-sub shit_done {
+- inplace
-        my @adv = @_;
-        my $msg = MIME::Lite->new(
-                From    => "$ENV{'USER'}\@detritus.fundacioace.com",
-                To      => "$ENV{'USER'}\@detritus.fundacioace.com",
-                Subject => 'Script terminado',
-                Type    => 'multipart/mixed',
-        );
-        $msg->attach(
+    This function takes a path and a file name or two paths
-                Type     => 'TEXT',
+    and returns a string with a single path as result of
-                Data     => "$adv[0] ha terminado en el estudio $adv[1].\n\n",
+    the concatenation of the first one plus the second one
-        );
-        $msg->attach(
+    usage:
-                Type     => 'application/gzip',
-                Path     => $adv[2],
-                Filename => basename($adv[2]),
-        );
-        $msg->send;
+            inplace(path, filename);
-}
-sub cut_shit {
+- load\_project
-        my $db = shift;
-        my $cfile = shift;
-        my @plist = get_subjects($db);
-        my @oklist;
-        if (-e $cfile){
-                my @cuts = get_list($cfile);
-                foreach my $cut (sort @cuts){
-                        if(grep {/$cut/} @plist){
-                                push @oklist, $cut;
-                        }
-                }
-        }else{
-                @oklist = @plist;
-        }
-return @oklist;
-}
-sub escape_name {
+    This function take the name of a project, reads the configuration file
-# in order to escape directory names with a lot of strange symbols
+    that is located at ~/.config/neuro/ and return every project configuration
-        my $name = shift;
+    stored as a hash that can be used at the scripts
-        $name=~s/\ /\\\ /g;
-        $name=~s/\`/\\\`/g;
-        $name=~s/\(/\\\(/g;
-        $name=~s/\)/\\\)/g;
-        return $name;
-}
-</code>
+    usage:
-===== FSMetrics =====
+            load_project(project_name);
-  * fs_file_metrics -> devuelve las ordenes que se ejecutaran en la extraccion de las metricas de FS
+- check\_subj
-<code perl FSMetrics.pm>
+    Here the fun begins
-#!/usr/bin/perl
-use strict; use warnings;
+    This function takes as input the name of the project and the subject ID
-package FSMetrics;
+    Then it seeks along the BIDS structure for this subject and returns a hash,
-require Exporter;
+    containing the MRI proper images.
-our @ISA                = qw(Exporter);
-our @EXPORT             = qw(fs_file_metrics);
+    It should return a single value, except for the T1w images, where an array
-our @EXPORT_OK  = qw(fs_file_metrics);
+    is returned. This was though this way because mostly a single session is done.
-our %EXPORT_TAGS        = (all => [qw(fs_file_metrics)], usual => [qw(fs_file_metrics)],);
+    However, the skill to detect more than one MRI was introduced to allow the
-our $VERSION    = 0.1
+    movement correction when ADNI images are analyzed
-;
-sub fs_file_metrics {
+    So, for T1w images the returned hash should be asked as
-my %stats = ('wmparc_stats' => {
-                'order' => "asegstats2table --subjects <list> --meas volume --skip --statsfile wmparc.stats --all-segs --tablefile <fs_output>/wmparc_stats.txt",
+            @{$nifti{'T1w'}}
-                'active' => 1,
-        },
+    but for other kind of image it should asked as
-        'aseg_stats' => {
-                'order' => "asegstats2table --subjects <list> --meas volume --skip --tablefile <fs_output>/aseg_stats.txt",
+            $nifti{'T2w'}
-                'active' => 1,
-        },
+    usage:
-        'aparc_volume_lh' => {
-                'order' => "aparcstats2table --subjects <list> --hemi lh --meas volume --skip --tablefile <fs_output>/aparc_volume_lh.txt",
+            check_subj(project_path, bids_id);
-                'active' => 1,
-        },
+- check\_pet
-        'aparc_thickness_lh' => {
-                'order' => "aparcstats2table --subjects <list> --hemi lh --meas thickness --skip --tablefile <fs_output>/aparc_thickness_lh.txt",
+    This function takes as input the name of the project and the subject ID
-                'active' => 1,
+    Then it seeks along the BIDS structure for this subject and returns a hash,
-        },
+    containing the PET proper images.
-        'aparc_area_lh' => {
-                'order' => "aparcstats2table --subjects <list> --hemi lh --meas area --skip --tablefile <fs_output>/aparc_area_lh.txt",
+    If also a tracer is given as input, then the returned hash contains the PET-tau
-                'active' => 1,
+    associated to this tracer. This was introduced as part of a project were the subjects
-        },
+    were analyzed with different radiotracers.
-        'aparc_meancurv_lh' => {
-                'order' => "aparcstats2table --subjects <list> --hemi lh --meas meancurv --skip --tablefile <fs_output>/aparc_meancurv_lh.txt",
+    If no tracer is given, it will seek for the FBB PETs. Those PETs are stored as
-        },
-        'aparc_volume_rh' => {
+            - single: 4x5min
-                'order' => "aparcstats2table --subjects <list> --hemi rh --meas volume --skip --tablefile <fs_output>/aparc_volume_rh.txt",
+            - combined: 20min
-                'active' => 1,
-        },
+    usage:
-        'aparc_thickness_rh' => {
-                'order' => "aparcstats2table --subjects <list> --hemi rh --meas thickness --skip --tablefile <fs_output>/aparc_thickness_rh.txt",
+            check_pet(project_path, bids_id, $optional_radiotracer);
-                'active' => 1,
-        },
+- check\_fs\_subj
-        'aparc_area_rh' => {
-                'order' => "aparcstats2table --subjects <list> --hemi rh --meas area --skip --tablefile <fs_output>/aparc_area_rh.txt",
+    This function checks if the Freesurfer directory of a given subjects exists
-                'active' => 1,
-        },
+    usage:
-        'aparc_meancurv_rh' => {
-                'order' => "aparcstats2table --subjects <list> --hemi rh --meas meancurv --skip --tablefile <fs_output>/aparc_meancurv_rh.txt",
+            check_fs_subj(freesurfer_id)
-        },
-        'lh.a2009s.volume' => {
+- get\_lut
-                'order' => "aparcstats2table --hemi lh --subjects <list> --parc aparc.a2009s --meas volume --skip -t <fs_output>/lh.a2009s.volume.txt",
-        },
+    I really don't even remenber what this shit does
-        'lh.a2009s.thickness' => {
-                'order' => "aparcstats2table --hemi lh --subjects <list> --parc aparc.a2009s --meas thickness --skip -t <fs_output>/lh.a2009s.thickness.txt",
+- run\_dckey
-        },
-        'lh.a2009s.area' => {
+    Get the content of a public tag from a DICOM file.
-                'order' => "aparcstats2table --hemi lh --subjects <list> --parc aparc.a2009s --meas area --skip -t <fs_output>/lh.a2009s.area.txt",
-        },
+    usage:
-        'lh.a2009s.meancurv' => {
-                'order' => "aparcstats2table --hemi lh --subjects <list> --parc aparc.a2009s --meas meancurv --skip -t <fs_output>/lh.a2009s.meancurv.txt",
+            run_dckey(key, dicom)
-        },
-        'rh.a2009s.volume' => {
+- dclokey
-                'order' => "aparcstats2table --hemi rh --subjects <list> --parc aparc.a2009s --meas volume --skip -t <fs_output>/rh.a2009s.volume.txt",
-        },
+    Get the content of a private tag from a DICOM file.
-        'rh.a2009s.thickness' => {
-                'order' => "aparcstats2table --hemi rh --subjects <list> --parc aparc.a2009s --meas thickness --skip -t <fs_output>/rh.a2009s.thickness.txt",
+    usage:
-        },
-        'rh.a2009s.area' => {
+            dclokey(key, dicom)
-                'order' => "aparcstats2table --hemi rh --subjects <list> --parc aparc.a2009s --meas area --skip -t <fs_output>/rh.a2009s.area.txt",
-        },
+- centiloid\_fbb
-        'rh.a2009s.meancurv' => {
-                'order' => "aparcstats2table --hemi rh --subjects <list> --parc aparc.a2009s --meas meancurv --skip -t <fs_output>/rh.a2009s.meancurv.txt",
+    Returns the proper centiloid value for a given SUVR.
-        },
+    Only valid for FBB.
-        'lh.BA.volume' => {
-                'order' => "aparcstats2table --hemi lh --subjects <list> --parc BA --meas volume --skip -t <fs_output>/lh.BA.volume.txt",
+    usage:
-        },
-        'lh.BA.thickness' => {
+            centiloid_fbb(suvr);
-                'order' => "aparcstats2table --hemi lh --subjects <list> --parc BA --meas thickness --skip -t <fs_output>/lh.BA.thickness.txt",
-        },
+- populate
-        'lh.BA.area' => {
-                'order' => "aparcstats2table --hemi lh --subjects <list> --parc BA --meas area --skip -t <fs_output>/lh.BA.area.txt",
+    Takes a pattern and a filename and stores the content of the file
-        },
+    into a HASH according to the given pattern
-        'lh.BA.meancurv' => {
-                'order' => "aparcstats2table --hemi lh --subjects <list> --parc BA --meas meancurv --skip -t <fs_output>/lh.BA.meancurv.txt",
+    usage:
-        },
-        'rh.BA.volume' => {
+            populate(pattern, filename);
-                'order' => "aparcstats2table --hemi rh --subjects <list> --parc BA --meas volume --skip -t <fs_output>/rh.BA.volume.txt",
-        },
+- get\_subjects
-        'rh.BA.thickness' => {
-                'order' => "aparcstats2table --hemi rh --subjects <list> --parc BA --meas thickness --skip -t <fs_output>/rh.BA.thickness.txt",
+    Parse a project database taking only the subjects and storing them into an array.
-        },
+    The databse is expected to be build as,
-       'lh.BA.area' => {
-                'order' => "aparcstats2table --hemi lh --subjects <list> --parc BA --meas area --skip -t <fs_output>/lh.BA.area.txt",
+;name
-        },
-        'lh.BA.meancurv' => {
+    usage:
-                'order' => "aparcstats2table --hemi lh --subjects <list> --parc BA --meas meancurv --skip -t <fs_output>/lh.BA.meancurv.txt",
-        },
+            get_subjects(filename);
-        'rh.BA.volume' => {
-                'order' => "aparcstats2table --hemi rh --subjects <list> --parc BA --meas volume --skip -t <fs_output>/rh.BA.volume.txt",
+- get\_list
-        },
-        'rh.BA.thickness' => {
+    Parse a project database taking only the subjects and storing them into an array.
-                'order' => "aparcstats2table --hemi rh --subjects <list> --parc BA --meas thickness --skip -t <fs_output>/rh.BA.thickness.txt",
+    The databse is expected to be build with a four digits number at the beginning of
-        },
+    line. Is similar to get\_subjects() function but less restrictive
-        'rh.BA.area' => {
-                'order' => "aparcstats2table --hemi rh --subjects <list> --parc BA --meas area --skip -t <fs_output>/rh.BA.area.txt",
+    usage:
-        },
-        'rh.BA.meancurv' => {
+            get_list(filename);
-                'order' => "aparcstats2table --hemi rh --subjects <list> --parc BA --meas meancurv --skip -t <fs_output>/rh.BA.meancurv.txt",
-        },
+- get\_pair
-);
-return %stats;
+    A single file is loaded as input and parse into a HASH.
-}
+    The file should be written in the format:
+            key;value
+    usage:
+            get_pair(filename);
+- shit\_done
+    this function is intended to be used  after a script ends
+    and then an email is send to the user
+    with the name of the script, the name of the project and th results attached
+    usage:
+            shit_done(script_name, project_name, attached_file)
+- cut\_shit
+    This function takes a project database and a file with a list, then
+    returns the elements that are common to both.
+    It is intended to be used to restrict the scripts action
+    over a few elements. It returns a single array.
+    If it is correctly used, first the db is identified with
+    _load\_project()_ function and then passed through this function
+    to get the array of subjects to be analyzed. If the file with
+    the cutting list do not exist, an array with all the subjects
+    is returned.
+    usage:
+            cut_shit(db, list);
+- getLoggingTime
+    This function returns a timestamp based string intended to be used
+    to make unique filenames
+    Stolen from Stackoverflow
+    usage:
+            getLoggingTime();
+</markdown>
+<markdown>
+# FSMetrics
+Bunch of helpers for storing ROI structure and relative data
+- fs\_file\_metrics
+    This function does not read any input. It sole purpose is to
+    returns a HASH containing the templates of order for converting Freesurfer (FS)
+    results into tables.
+    Any hash element is composed by the template ('order'), a boolean ('active') to decide
+    if the FS stats will be processed and the name of the FS stat file ('file').
+    The order template has two wildcards (<list> and <fs\_output>) that should be
+    parsed and changed by the FS subject id and the output directory where the
+    data tables will be stored for each subject
+    The function could be invoked as,
+            my %stats = fs_file_metrics();
+    in any script where this information would be needed.
+    The boolean element could be used to choose the stats that should
+    be processed and can be added or modified even at run time if needed. The
+    stored booleans only provided a decent default
+- fs\_fbb\_rois
+    _deprecated_
+    This function exports a HASH that contains the Freesurfer composition of the
+    usual segmentations used for building the SUVR ROI
+- tau\_rois
+    This function takes a string as input and returns an ARRAY containing
+    the list of ROIs that should be build and where the SUVR should be calculated
+    It is intended to be used for PET-Tau but could be used anywhere
+    By default a list of Braak areas are returned. If the input string is **alt**
+    a grouping of those Braak areas is returned. If the purpose is to build
+    a meta\_temporal ROI the string **meta** should be passed as input
+    The main idea here is read the corresponding file for each ROI, stored at
+    `PIPEDIR/lib/tau/` and build each ROI with the FS LUTs store there
+- pet\_rois
+    This function takes a string as input and returns an ARRAY containing
+    the list of ROIs that should be build and where the SUVR should be calculated
+    Input values are **parietal**, **frontal**, **pieces** or **global** (default)
+    The main idea here is read the corresponding file for each ROI, stored at
+    `PIPEDIR/lib/pet/` and build each ROI with the FS LUTs stored there
+</markdown>
+<markdown>
+# SLURM
+This module contains just a function to send the jobs to SLURM
+from the Perl scripts
+- send2slurm
+    The function takes a HASH as input where all the information
+    relative to the job should be stored. No data is mandatory
+    inside the input HASH, since the minimal values are automagicaly
+    asigned by default as a constructor (no really, but anyway).
+    Take into account that this subroutine only pass the parameters
+    to SLURM. So, the logic behind your actions should correspond
+    to what you want to do in any case, exactly as if you were
+    writing sbatch scripts.
+    The managed options for SLURM jobs are:
+            - filename: File where the sbatch script will be stored
+            - job_name: Job name for SLURM (-J)
+            - cpus: Number of CPUs to be used by each job (-c)
+            - mem_per_cpu: Amount of memory to be used for each CPU (--mem-per-cpu)
+            - time: Maximum time that the job will be allowed to run (--time)
+            - output: File where the sbatch script output will be stored (-o)
+            - partition: SLURM partition to be used (-p)
+            - gres: GPUs to be used (--gres)
+            - command: Command to be executed at sbatch script
+            - mailtype: Type of warning to be emailed (--mail-type)
+            - dependency: Full dependency string to be used at sbatch execution (--dependency), see more below
+    The function returns the jobid of the queued job, so it can be used to
+    build complex workflows.
+    usage: my $job\_id = send2slurm(\\%job\_properties);
+    Warning email: By default, if an empty HASH is passed to the function,
+    a no command sbatch script is launched
+    with _--mail-type=END_ option. The intention is that this could be used to
+    warn at the end of any launched swarm. Also, by changing **mailtype** but
+    ommiting the **command** value you can force the function to execute
+    an empty sbatch job with whatever warning behavior that you choose.
+    Dependencies: If dependencies are going to be used, you need to pass to
+    the function the full string that SLURM expects. That is, you can pass something
+    like _singleton_ or _after:000000_ or even _afterok:000000,000001,000002_.
+    This last can be build, by example, storing every previous jobid into an ARRAY
+    and passing then as,
+            ...
+                    my $jobid = send2slurm(\%previous);
+                    push @jobids, $jobid;
+            ...
+            $task{'dependency'} = 'afterok:'.join(',',@jobids);
+            ...
+            send2slurm(\%task);
+    Of course, if dependencies are not going to be used, the
+    **dependency** option could be safely ignored. But notice that, if you are
+    reusing a HASH then this key should be deleted from it.
+</markdown>
+<markdown>
+# XNATACE
+- xconf
+    Publish path of xnatapic configuration file
+    usage:
+            $path = xconf();
+- xget\_conf
+    Get the XNAT connection data into a HASH
+    usage:
+            %xnat_data = xget_conf()
+- xget\_pet
+    Get the XNAT PET experiment ID
+    usage:
+            xget_pet(host, jsession, project, subject)
+- xget\_mri
+    Get the XNAT MRI experiment ID
+    usage:
+            xget_mri(host, jsession, project, subject)
+- xget\_fs\_data
+Get the full Freesurfer directory in a tar.gz file
+    usage:
+            xget_fs_data(host, jsession, project, experiment, output_path)
+- xget\_fs\_stats
+    Get a single stats file from Freesurfer segmentation
+    usage:
+            xget_fs_stats(host, jsession, experiment stats_file, output_file)
+- xget\_session
+    Create a new JSESSIONID on XNAT. Return the connection data
+    for the server AND the ID of the created session
+    usage:
+            xget_session();
+- xput\_report
+    Upload a pdf report to XNAT
+    usage:
+            xput_report(host, jsession, subject, experiment, pdf_file);
+- xput\_rvr
+    Upload a JSON file with VR data
+    usage:
+            xput_rvr(host, jsession, experiment, json_file);
+- xget\_rvr
+    Get VR results into a HASH. Output is a hash with filenames and URI of each element stored at RVR
+    usage:
+            xget_rvr(host, jsession, project, experiment);
+- xget\_rvr\_data
+    Get RVR JSON data into a hash
+    usage:
+            xget_rvr_data(host, jsession, URI);
+- xget\_subjects
+    Get the list of subjects of a project into a HASH.
+    El HASH de input, _%sbjs_, se construye como _{ XNAT\_ID => Label }_
+    usage:
+            %sbjs = xget_subjects(host, jsession, project);
+- xget\_pet\_reg
+    Download de pet registered into native space in nifti format
+    usage:
+            xget_pet_reg(host, jsession, experiment, nifti_output);
+- xget\_pet\_data
+    Get the PET FBB analysis results into a HASH
+    usage:
+            %xresult = xget_pet_data(host, jsession, experiment);
+- xget\_exp\_data
+    Get a data field of an experiment.
+    The desired field shoud be indicated as input.
+    By example, if you want the date of the experiment this is
+    seeked as
+            my $xdate = xget_exp_data($host, $session_id, $experiment, 'date')
+    There are some common fields as _date_, _label_ or _dcmPatientId_
+    but in general  you should look at,
+            curl -X GET -b JSESSIONID=00000blahblah "http://myhost/data/experiments/myexperiment?format=json" 2>/dev/null | jq '.items[0].data_fields'
+    in order to know the available fields
+    usage:
+            $xdata = xget_exp_data(host, jsession, experiment, field);
+- xget\_sbj\_data
+    Get the subjects metadata. Not too
+    much interesting but to extract
+    the subject label.
+    usage:
+            $xdata = xget_sbj_data(host, jsession, subject, field);
+</markdown>
+====== Dependencias ======
+<code>
+Data::Dump
+File::Slurp
+File::Basename
+File::Temp
+File::Copy::Recursive
+File::Copy
+File::Find::Rule
+File::Remove
+Cwd
+Spreadsheet::Write
+Text::CSV
+File::Path
+MIME::Lite
+JSON
 </code>

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