DICOMDir - OO dicom directory

%DICOMDIR DICOMDir object representing the heirarchical structure of a DICOMDIR file
%
% USAGE:
% DD = DICOMDir(FILE) where FILE is the path to a given DICOMDIR file
%
% DICOMDIR methods:
% gui - will open a graphical user interface to browse the DICOMDIR
% exportImgsToDCM - will export images in the DICOMDIR to a new folder
% deleteImgs - will delete images in the DICOMDIR from disk
%
% getOrigFullFilenames - returns the full file names of images in the DICOMDIR
% retrieveExtraFields - retrieves additional fields into patients, studies, series or images
%
% parseDicomdir - (Static) returns DICOMDIR patients, studies, series and images separately
%
%
% DICOMDIR properties:
% filepath - Full path of this DICOMDIR file
% filename - DICOMDIR filename (defaults to "DICOMDIR")
% patients - Structure array containing all PATIENT information
% studies - Structure array containing all STUDY information
% series - Structure array containing all SERIES information
% images - Structure array containing all IMAGE information
% studiesMap - N-by-2 array linking STUDIES to their corresponding PATIENT index
% seriesMap - N-by-3 array linking SERIES to their corresponding PATIENT/STUDY indices
% imagesMap - N-by-3 array linking IMAGES to their corresponding PATIENT/STUDY/SERIES indices

% Written by Sven Holcombe (Oct 6, 2011)