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############################################################################## |
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# CommonUtil.pm -- a module including common functions for internal use |
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# |
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# Copyright (c) 2010 Baoshe Zhang. All rights reserved. |
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# This file is part of "DicomPack". DicomPack is free software; |
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# you can redistribute it and/or modify it under the same |
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# terms as Perl itself. |
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############################################################################## |
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package DicomPack::IO::CommonUtil; |
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use strict; |
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use warnings; |
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2514
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use DicomPack::DB::DicomTagDict qw/getTagDesc getTagID/; |
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use DicomPack::DB::DicomVRDict qw/getVR/; |
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use vars qw(@ISA @EXPORT_OK); |
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use Exporter; |
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1607
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@ISA = qw/Exporter/; |
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@EXPORT_OK = qw/_getEndian _pack _unpack _isLittleEndian _toString _getDicomValue _showDicomField _parseDicomFieldPath/; |
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# get the endianness of current system. ">" for big endiannes, "<" for little endianness. |
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sub _getEndian |
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{ |
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return ">" if pack("L", 1) eq pack("N", 1); |
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return "<"; |
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} |
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# a repalcement for pack function. The versions of perl prior to 5.10.0 do not support ">" and "<". |
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sub _pack |
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{ |
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my ($dataType, $endianness, $data) = @_; |
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if(eval("require 5.0100") or $endianness eq "") |
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{ |
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return pack($dataType.$endianness."*", @$data); |
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} |
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if($dataType !~ /^[sSiIlLqQjJfFdDpP]$/) |
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{ |
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die "DataType: $dataType, not supporte!!!\n"; |
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} |
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0
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if(ref($data) ne "ARRAY") |
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{ |
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die "Data should be an ARRAY Ref!!!\n"; |
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} |
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0
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if(_getEndian() eq $endianness) |
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{ |
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return pack($dataType."*", @$data); |
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} |
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else |
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{ |
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my $data_t = ""; |
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foreach my $iData (@$data) |
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{ |
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my $iData_t = pack "C*", reverse unpack("C*", pack($dataType, $iData)); |
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$data_t .= $iData_t; |
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} |
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return $data_t; |
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} |
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} |
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66
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# A replacement for unpack. The versions of perl prior to 5.10.0 do not support ">" and "<". |
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sub _unpack |
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{ |
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my ($dataType, $endianness, $data) = @_; |
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if(eval("require 5.0100") or $endianness eq "") |
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{ |
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return unpack($dataType.$endianness."*", $data); |
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} |
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76
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0
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0
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if($dataType !~ /^[sSiIlLqQjJfFdDpP]$/) |
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{ |
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die "DataType: $dataType, not supporte!!!\n"; |
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} |
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81
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0
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0
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if(_getEndian() eq $endianness) |
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{ |
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return unpack($dataType."*", $data); |
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} |
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else # little endianness |
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{ |
87
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0
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my @data_t; |
88
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0
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foreach my $iData (unpack($dataType."*", $data)) |
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{ |
90
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my $iData_t = unpack($dataType, pack("C*", reverse unpack("C*", pack($dataType, $iData)))); |
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0
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push @data_t, $iData_t; |
92
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} |
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0
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return @data_t; |
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} |
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} |
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97
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# check the endianness of a dicom file according to "0002,0010" of meta info |
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sub _isLittleEndian |
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{ |
100
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0
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my $dicomFields = shift; |
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my $isLittleEndian = 1; |
102
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0
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0
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if(defined $dicomFields) |
103
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{ |
104
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0
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0
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if(defined $dicomFields->{"0002,0010"}) |
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{ |
106
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0
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my ($tt_t, $vv_t) = _getDicomValue($dicomFields->{"0002,0010"}); |
107
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0
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my $transferSyntax = $vv_t->[0]; |
108
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0
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0
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if($transferSyntax eq "1.2.840.10008.1.2.2") |
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{ |
110
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0
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$isLittleEndian = 0; |
111
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} |
112
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} |
113
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} |
114
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0
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return $isLittleEndian; |
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} |
116
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117
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# convert a composite dicom value to a string |
118
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sub _toString |
119
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{ |
120
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0
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my $dicomValue = shift; |
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my $isLittleEndian = shift; |
122
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my $verbose = shift; |
123
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0
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my $indent = shift; |
124
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125
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my ($vr, $value) = _getDicomValue($dicomValue, $isLittleEndian); |
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127
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0
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my $valueStr = ""; |
128
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129
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0
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0
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if($verbose <= 1) |
130
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{ |
131
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0
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my $nPrint = scalar @$value; |
132
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0
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0
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if($nPrint > 15) |
133
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{ |
134
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0
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$nPrint = 15; |
135
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} |
136
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0
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for(my $i=0; $i<$nPrint; $i++) |
137
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{ |
138
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0
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my $t = $value->[$i]; |
139
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0
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$valueStr .= $t.' '; |
140
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} |
141
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0
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0
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if($nPrint < scalar @$value) |
142
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{ |
143
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0
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$valueStr .= "...\n"; |
144
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} |
145
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146
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0
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0
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if(length($valueStr) > 255) |
147
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{ |
148
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0
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$valueStr = substr($valueStr, 0, 255); |
149
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0
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$valueStr .= "...\n"; |
150
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} |
151
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} |
152
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else |
153
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{ |
154
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0
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for(my $i=0; $i
|
155
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{ |
156
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0
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my $t = $value->[$i]; |
157
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0
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$valueStr .= $t.' '; |
158
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0
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0
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if(($i+1)%16 == 0) |
159
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{ |
160
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0
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$valueStr .= "\n"." ".$indent; |
161
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} |
162
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} |
163
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} |
164
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165
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0
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return $vr.":".$valueStr; |
166
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} |
167
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168
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# process a composite dicom value |
169
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sub _getDicomValue |
170
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{ |
171
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0
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0
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my $dicomValue = shift; |
172
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0
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my $isLittleEndian = shift; |
173
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174
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0
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my $vr = substr($dicomValue, 0, 2); |
175
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0
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my $value = substr($dicomValue, 3); |
176
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177
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0
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my @t_data; |
178
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179
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0
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my $vrItem = getVR($vr); |
180
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0
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0
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if(defined $vrItem->{tailing}) |
181
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{ |
182
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0
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$value =~ s/($vrItem->{tailing})+$//; |
183
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} |
184
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0
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0
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if(defined $vrItem->{leading}) |
185
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{ |
186
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0
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$value =~ s/^($vrItem->{leading})+//; |
187
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} |
188
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189
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0
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0
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if(defined $vrItem->{type}) |
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0
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190
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{ |
191
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0
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my $endianness = "<"; |
192
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0
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0
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$endianness = ">" unless $isLittleEndian; |
193
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0
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0
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0
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if($vrItem->{type} eq "C" or $vrItem->{type} eq "c") |
194
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{ |
195
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0
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$endianness = ""; |
196
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} |
197
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#@t_data = unpack($vrItem->{type}.$endianness."*", $value); |
198
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0
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@t_data = _unpack($vrItem->{type}, $endianness, $value); |
199
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} |
200
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elsif (defined $vrItem->{delimiter}) |
201
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{ |
202
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0
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@t_data = split quotemeta($vrItem->{delimiter}), $value; |
203
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} |
204
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else |
205
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{ |
206
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0
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@t_data = $value; |
207
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} |
208
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209
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0
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return ($vr, \@t_data); |
210
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} |
211
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212
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# show dicom file's structure and field data (recursive) |
213
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sub _showDicomField |
214
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|
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{ |
215
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0
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0
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my $dicomFields = shift; |
216
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0
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my $depth = shift; |
217
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0
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my $verbose = shift; |
218
|
|
|
|
|
|
|
|
219
|
0
|
|
|
|
|
|
my $isLittleEndian = shift; |
220
|
|
|
|
|
|
|
|
221
|
0
|
|
|
|
|
|
my $tagID = shift; |
222
|
|
|
|
|
|
|
|
223
|
0
|
|
|
|
|
|
my $indent = " " x (4*$depth); |
224
|
|
|
|
|
|
|
|
225
|
0
|
0
|
|
|
|
|
if(ref($dicomFields) eq "HASH") |
|
|
0
|
|
|
|
|
|
226
|
|
|
|
|
|
|
{ |
227
|
0
|
|
|
|
|
|
foreach my $field_t (sort keys %$dicomFields) |
228
|
|
|
|
|
|
|
{ |
229
|
0
|
|
|
|
|
|
my $desc = getTagDesc($field_t); |
230
|
0
|
|
|
|
|
|
print $indent."$field_t"." [".$desc."]"."->\n"; |
231
|
0
|
|
|
|
|
|
_showDicomField($dicomFields->{$field_t}, $depth+1, $verbose, $isLittleEndian, $field_t); |
232
|
|
|
|
|
|
|
} |
233
|
|
|
|
|
|
|
} |
234
|
|
|
|
|
|
|
elsif(ref($dicomFields) eq "ARRAY") |
235
|
|
|
|
|
|
|
{ |
236
|
0
|
|
|
|
|
|
for(my $index=0; $index < scalar @$dicomFields; $index++) |
237
|
|
|
|
|
|
|
{ |
238
|
0
|
|
|
|
|
|
print $indent."$index->\n"; |
239
|
0
|
|
|
|
|
|
_showDicomField($dicomFields->[$index], $depth+1, $verbose, $isLittleEndian); |
240
|
|
|
|
|
|
|
} |
241
|
|
|
|
|
|
|
} |
242
|
|
|
|
|
|
|
else |
243
|
|
|
|
|
|
|
{ |
244
|
0
|
0
|
|
|
|
|
if($verbose >= 1) |
245
|
|
|
|
|
|
|
{ |
246
|
0
|
0
|
0
|
|
|
|
if(defined $tagID and $tagID =~ /^0002,/) |
247
|
|
|
|
|
|
|
{ |
248
|
0
|
|
|
|
|
|
print $indent._toString($dicomFields, 1, $verbose, $indent), "\n"; |
249
|
|
|
|
|
|
|
} |
250
|
|
|
|
|
|
|
else |
251
|
|
|
|
|
|
|
{ |
252
|
0
|
|
|
|
|
|
print $indent._toString($dicomFields, $isLittleEndian, $verbose, $indent), "\n"; |
253
|
|
|
|
|
|
|
} |
254
|
|
|
|
|
|
|
} |
255
|
|
|
|
|
|
|
} |
256
|
|
|
|
|
|
|
} |
257
|
|
|
|
|
|
|
|
258
|
|
|
|
|
|
|
sub _parseDicomFieldPath |
259
|
|
|
|
|
|
|
{ |
260
|
0
|
|
|
0
|
|
|
my $fieldPath = shift; |
261
|
|
|
|
|
|
|
|
262
|
0
|
|
|
|
|
|
$fieldPath =~ s/^\s*\/*//; |
263
|
0
|
|
|
|
|
|
$fieldPath =~ s/\/*\s*$//; |
264
|
0
|
|
|
|
|
|
my @fieldID = split /\//, $fieldPath; |
265
|
|
|
|
|
|
|
|
266
|
0
|
|
|
|
|
|
my @tagIDList; |
267
|
|
|
|
|
|
|
|
268
|
0
|
|
|
|
|
|
my $nFields = scalar @fieldID; |
269
|
0
|
|
|
|
|
|
for(my $i=0; $i<$nFields; $i++) |
270
|
|
|
|
|
|
|
{ |
271
|
0
|
|
|
|
|
|
my $tagID = $fieldID[$i]; |
272
|
|
|
|
|
|
|
|
273
|
0
|
0
|
0
|
|
|
|
$tagID = getTagID($tagID) if ($tagID !~ /^\d+$/ and $tagID ne "x"); |
274
|
|
|
|
|
|
|
|
275
|
0
|
0
|
|
|
|
|
die "Tag: $fieldID[$i], not exists!!!" unless defined $tagID; |
276
|
|
|
|
|
|
|
|
277
|
0
|
|
|
|
|
|
push @tagIDList, $tagID; |
278
|
|
|
|
|
|
|
} |
279
|
0
|
|
|
|
|
|
return @tagIDList; |
280
|
|
|
|
|
|
|
} |
281
|
|
|
|
|
|
|
|
282
|
|
|
|
|
|
|
1; |
283
|
|
|
|
|
|
|
|