def jitter_timestamp(dicom, field, value):
"""if present, jitter a timestamp in dicom
field "field" by number of days specified by "value"
The value can be positive or negative.
Parameters
==========
dicom: the pydicom Dataset
field: the field with the timestamp
value: number of days to jitter by. Jitter bug!
"""
if not isinstance(value, int):
value = int(value)
original = dicom.get(field)
if original is not None:
# Create default for new value
new_value = None
# If we have a string, we need to create a DataElement
if isinstance(field, str):
dcmvr = dicom.data_element(field).VR
else:
dcmvr = dicom.get(field).VR
original = dicom.get(field).value
# DICOM Value Representation can be either DA (Date) DT (Timestamp),
# or something else, which is not supported.
if dcmvr == "DA":
# NEMA-compliant format for DICOM date is YYYYMMDD
new_value = get_timestamp(original,
jitter_days=value,
format="%Y%m%d")
elif dcmvr == "DT":
# NEMA-compliant format for DICOM timestamp is
# YYYYMMDDHHMMSS.FFFFFF&ZZXX
new_value = get_timestamp(original,
jitter_days=value,
format="%Y%m%d%H%M%S.%f%z")
else:
# Do nothing and issue a warning.
bot.warning("JITTER not supported for %s with VR=%s" %
(field, dcmvr))
if new_value is not None and new_value != original:
# Only update if there's something to update AND there's been change
dicom = update_tag(dicom, field=field, value=new_value)
return dicom
def jitter_timestamp(dicom, field, value):
'''if present, jitter a timestamp in dicom
field "field" by number of days specified by "value"
The value can be positive or negative.
Parameters
==========
dicom: the pydicom Dataset
field: the field with the timestamp
value: number of days to jitter by. Jitter bug!
'''
if not isinstance(value, int):
value = int(value)
original = dicom.get(field, None)
if original is not None:
dcmvr = dicom.data_element(field).VR
'''
DICOM Value Representation can be either DA (Date) DT (Timestamp),
or something else, which is not supported.
'''
if (dcmvr == 'DA'):
'''
NEMA-compliant format for DICOM date is YYYYMMDD
'''
new_value = get_timestamp(original,
jitter_days=value,
format='%Y%m%d')
elif (dcmvr == 'DT'):
'''
NEMA-compliant format for DICOM timestamp is
YYYYMMDDHHMMSS.FFFFFF&ZZXX
'''
new_value = get_timestamp(original,
jitter_days=value,
format='%Y%m%d%H%M%S.%f%z')
else:
# Do nothing and issue a warning.
new_value = None
bot.warning("JITTER not supported for %s with VR=%s" %
(field, dcmvr))
if (new_value is not None and new_value != original):
# Only update if there's something to update AND there's been change
dicom = update_tag(dicom, field=field, value=new_value)
return dicom