/usr/lib/python2.7/dist-packages/dicom/datadict.py is in python-dicom 0.9.7-1.1ubuntu1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 | # datadict.py
# -*- coding: utf-8 -*-
"""Access dicom dictionary information"""
#
# Copyright (c) 2008-2011 Darcy Mason
# This file is part of pydicom, released under a modified MIT license.
# See the file license.txt included with this distribution, also
# available at http://pydicom.googlecode.com
#
import logging
logger = logging.getLogger("pydicom")
from dicom.tag import Tag
from dicom._dicom_dict import DicomDictionary # the actual dict of {tag: (VR, VM, name, is_retired, keyword), …}
from dicom._dicom_dict import RepeatersDictionary # those with tags like "(50xx, 0005)"
from dicom._private_dict import private_dictionaries
import warnings
# Generate mask dict for checking repeating groups etc.
# Map a true bitwise mask to the DICOM mask with "x"'s in it.
masks = {}
for mask_x in RepeatersDictionary:
# mask1 is XOR'd to see that all non-"x" bits are identical (XOR result = 0 if bits same)
# then AND those out with 0 bits at the "x" ("we don't care") location using mask2
mask1 = long(mask_x.replace("x", "0"),16)
mask2 = long("".join(["F0"[c=="x"] for c in mask_x]),16)
masks[mask_x] = (mask1, mask2)
# For shorter naming of dicom member elements, put an entry here
# (longer naming can also still be used)
# The descriptive name must start with the long version (not replaced if internal)
shortNames = [("BeamLimitingDevice", "BLD"),
("RTBeamLimitingDevice", "RTBLD"),
("ControlPoint", "CP"),
("Referenced", "Refd")
]
def mask_match(tag):
for mask_x, (mask1, mask2) in masks.items():
if (tag ^ mask1) & mask2 == 0:
return mask_x
return None
def get_entry(tag):
"""Return the tuple (VR, VM, name, is_retired, keyword) from the DICOM dictionary
If the entry is not in the main dictionary, check the masked ones,
e.g. repeating groups like 50xx, etc.
"""
tag = Tag(tag)
try:
return DicomDictionary[tag]
except KeyError:
mask_x = mask_match(tag)
if mask_x:
return RepeatersDictionary[mask_x]
else:
raise KeyError, "Tag %s not found in DICOM dictionary" % tag
def dictionary_description(tag):
"""Return the descriptive text for the given dicom tag."""
return get_entry(tag)[2]
def dictionaryVM(tag):
"""Return the dicom value multiplicity for the given dicom tag."""
return get_entry(tag)[1]
def dictionaryVR(tag):
"""Return the dicom value representation for the given dicom tag."""
return get_entry(tag)[0]
def dictionary_has_tag(tag):
"""Return True if the dicom dictionary has an entry for the given tag."""
return (tag in DicomDictionary)
def dictionary_keyword(tag):
"""Return the official DICOM standard (since 2011) keyword for the tag"""
return get_entry(tag)[4]
import string
normTable = string.maketrans('','')
def keyword_for_tag(tag):
"""Return the DICOM keyword for the given tag. Replaces old CleanName()
method using the 2011 DICOM standard keywords instead.
Will return GroupLength for group length tags,
and returns blank ("") if the tag doesn't exist in the dictionary.
"""
try:
return dictionary_keyword(tag)
except KeyError:
return ""
def CleanName(tag):
"""Return the dictionary descriptive text string but without bad characters.
Used for e.g. *named tags* of Dataset instances (before DICOM keywords were
part of the standard)
"""
tag = Tag(tag)
if tag not in DicomDictionary:
if tag.element == 0: # 0=implied group length in DICOM versions < 3
return "GroupLength"
else:
return ""
s = dictionary_description(tag) # Descriptive name in dictionary
# remove blanks and nasty characters
s = s.translate(normTable, r""" !@#$%^&*(),;:.?\|{}[]+-="'’/""")
# Take "Sequence" out of name as more natural sounding
# e..g "BeamSequence"->"Beams"; "ReferencedImageBoxSequence"->"ReferencedImageBoxes"
# 'Other Patient ID' exists as single value AND as sequence so check for it and leave 'Sequence' in
if dictionaryVR(tag) == "SQ" and not s.startswith("OtherPatientIDs"):
if s.endswith("Sequence"):
s = s[:-8]+"s"
if s.endswith("ss"):
s = s[:-1]
if s.endswith("xs"):
s = s[:-1] + "es"
if s.endswith("Studys"):
s = s[:-2]+"ies"
return s
# Provide for the 'reverse' lookup. Given clean name, what is the tag?
logger.debug("Reversing DICOM dictionary so can look up tag from a name...")
NameDict = dict([(CleanName(tag), tag) for tag in DicomDictionary])
keyword_dict = dict([(dictionary_keyword(tag), tag) for tag in DicomDictionary])
def short_name(name):
"""Return a short *named tag* for the corresponding long version.
Return a blank string if there is no short version of the name.
"""
for longname, shortname in shortNames:
if name.startswith(longname):
return name.replace(longname, shortname)
return ""
def long_name(name):
"""Return a long *named tag* for the corresponding short version.
Return a blank string if there is no long version of the name.
"""
for longname, shortname in shortNames:
if name.startswith(shortname):
return name.replace(shortname, longname)
return ""
def tag_for_name(name):
"""Return the dicom tag corresponding to name, or None if none exist."""
if name in keyword_dict: # the usual case
return keyword_dict[name]
# If not an official keyword, check the old style pydicom names
if name in NameDict:
tag = NameDict[name]
msg = ("'%s' as tag name has been deprecated; use official DICOM keyword '%s'"
% (name, dictionary_keyword(tag)))
warnings.warn(msg, DeprecationWarning)
return tag
# check if is short-form of a valid name
longname = long_name(name)
if longname:
return NameDict.get(longname, None)
return None
def all_names_for_tag(tag):
"""Return a list of all (long and short) names for the tag"""
longname = keyword_for_tag(tag)
shortname = short_name(longname)
names = [longname]
if shortname:
names.append(shortname)
return names
# PRIVATE DICTIONARY handling
# functions in analogy with those of main DICOM dict
def get_private_entry(tag, private_creator):
"""Return the tuple (VR, VM, name, is_retired) from a private dictionary"""
tag = Tag(tag)
try:
private_dict = private_dictionaries[private_creator]
except KeyError:
raise KeyError, "Private creator '%s' not in private dictionary" % private_creator
# private elements are usually agnostic for "block" (see PS3.5-2008 7.8.1 p44)
# Some elements in _private_dict are explicit; most have "xx" for high-byte of element
# Try exact key first, but then try with "xx" in block position
try:
dict_entry = private_dict[tag]
except KeyError:
# so here put in the "xx" in the block position for key to look up
group_str = "%04x" % tag.group
elem_str = "%04x" % tag.elem
key = "%sxx%s" % (group_str, elem_str[-2:])
if key not in private_dict:
raise KeyError, "Tag %s not in private dictionary for private creator '%s'" % (key, private_creator)
dict_entry = private_dict[key]
return dict_entry
def private_dictionary_description(tag, private_creator):
"""Return the descriptive text for the given dicom tag."""
return get_private_entry(tag, private_creator)[2]
def private_dictionaryVM(tag, private_creator):
"""Return the dicom value multiplicity for the given dicom tag."""
return get_private_entry(tag, private_creator)[1]
def private_dictionaryVR(tag, private_creator):
"""Return the dicom value representation for the given dicom tag."""
return get_private_entry(tag, private_creator)[0]
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