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dcmodify(1)			  OFFIS	DCMTK			   dcmodify(1)

       dcmodify	- Modify DICOM files

       dcmodify	[options] dcmfile-in...

       dcmodify	 is  a	tool that allows one to	modify,	insert and delete tags
       and items in DICOM files. Sequences and tags with a value  multiplicity
       > 1 are also supported. Metaheader information and the tag's VR can not
       be modified directly by dcmodify	at  this  time.	 In  addition  to  tag
       modifications,  dcmodify	 makes	available some input options - forcing
       dcmodify	to handle its input files as the user specifies	-  and	output
       options to control the output format of the resulting files.

       In  case	multiple modifications have to be performed, dcmodify does the
       modifications in	the same order as they appear  on  the	command	 line.
       Please  note that dcmodify does not check whether a given value matches
       its value representation	(VR). Usually, an error	message	is printed but
       generally the user should take care of the right	VR usage.

       If dcmodify doesn't know	the tag	it should insert, then the tag's VR is
       set to UN and the value provided	on  command  line  is  interpreted  as
       being  a	 series	 of  hexadecimal  numbers  (like they are provided for
       VR=OB). Please insert these tags	into  the  dictionary  to  avoid  this
       behavior.  Also,	 specifying  the  -iun option, it is possible to force
       dcmodify	to leave UN values untouched. Using option  -u	lets  dcmodify
       saving all VR=UN	attributes as OB.

       dcmodify	 is  able  to  work with so-called tag paths to	access tags in
       sequences. The (pseudo-formalized) syntax is


       where 'sequence'	is a sequence tag like	(0008,1111)  or	 a  dictionary
       name  for  a  tag.  'item-no'  describes	the item number	to be accessed
       (counting from zero). 'element' defines the target tag to  work	on.  A
       tag  can	 either	 be  specified	directly as (0010,0010)	or through the
       corresponding dictionary	name 'PatientName'. The	'*' denotes  that  you
       can  repeat  sequence statements	to access deeper levels	in DICOM files
       (see EXAMPLES section). For 'item-no', also a  wildcard	character  '*'
       can  be	used  selecting	all items in surrounding sequence (see section
       WILDCARDS below).

       When inserting tag paths	consisting  of	multiple  nodes	 (i.e.	not  a
       single  element)	using the -i option, any missing path elements (items,
       sequences, leaf elements) are inserted automatically when missing. That
       does  not  work	for  item wildcards: When no single item exists	in the
       surrounding sequence dcmodify of	course can't decide,  how  many	 items
       should  be  generated.  However,	if specifying an item number like '5',
       all 6  items  (counted  from  zero)  can	 be  (and  are)	 automatically
       generated  in insert mode. If already 2 items would exist, the rest (4)
       would be	inserted.

       Please note that	there are some issues concerning the  modification  of
       private tags (see PRIVATE TAGS section) and for changing	UIDs (CHANGING
       UIDs section).

       dcmfile-in  DICOM input filename(s) to be modified

   general options
	 -h    --help
		 print this help text and exit

		 print version information and exit

		 print expanded	command	line arguments

	 -q    --quiet
		 quiet mode, print no warnings and errors

	 -v    --verbose
		 verbose mode, print processing	details

	 -d    --debug
		 debug mode, print debug information

	 -ll   --log-level  [l]evel: string constant
		 (fatal, error,	warn, info, debug, trace)
		 use level l for the logger

	 -lc   --log-config  [f]ilename: string
		 use config file f for the logger

   input options
       input file format:

	 +f    --read-file
		 read file format or data set (default)

	 +fo   --read-file-only
		 read file format only

	 -f    --read-dataset
		 read data set without file meta information

	 +fc   --create-file
		 create	file format if file does not exist

       input transfer syntax:

	 -t=   --read-xfer-auto
		 use TS	recognition (default)

	 -td   --read-xfer-detect
		 ignore	TS specified in	the file meta header

	 -te   --read-xfer-little
		 read with explicit VR little endian TS

	 -tb   --read-xfer-big
		 read with explicit VR big endian TS

	 -ti   --read-xfer-implicit
		 read with implicit VR little endian TS

       parsing of odd-length attributes:

	 +ao   --accept-odd-length
		 accept	odd length attributes (default)

	 +ae   --assume-even-length
		 assume	real length is one byte	larger

       automatic data correction:

	 +dc   --enable-correction
		 enable	automatic data correction (default)

	 -dc   --disable-correction
		 disable automatic data	correction

       bitstream format	of deflated input:

	 +bd   --bitstream-deflated
		 expect	deflated bitstream (default)

	 +bz   --bitstream-zlib
		 expect	deflated zlib bitstream

   processing options
       backup input files:

		 backup	files before modifying (default)

	 -nb   --no-backup
		 don't backup files (DANGEROUS)

       insert mode:

	 -i    --insert	 "[t]ag-path=[v]alue"
		 insert	(or overwrite) path at position	t with value v

	 -if   --insert-from-file  "[t]ag-path=[f]ilename"
		 insert	(or overwrite) path at position	t with value from file f

	 -nrc  --no-reserv-check
		 do not	check private reservations

       modify mode:

	 -m    --modify	 "[t]ag-path=[v]alue"
		 modify	tag at position	t to value v

	 -mf   --modify-from-file  "[t]ag-path=[f]ilename"
		 modify	tag at position	t to value from	file f

	 -ma   --modify-all  "[t]ag=[v]alue"
		 modify	ALL matching tags t in file to value v

       erase mode:

	 -e    --erase	"[t]ag-path"
		 erase tag/item	at position t

	 -ea   --erase-all  "[t]ag"
		 erase ALL matching tags t in file

	 -ep   --erase-private
		 erase ALL private data	from file

       unique identifier:

	 -gst  --gen-stud-uid
		 generate new Study Instance UID

	 -gse  --gen-ser-uid
		 generate new Series Instance UID

	 -gin  --gen-inst-uid
		 generate new SOP Instance UID

	 -nmu  --no-meta-uid
		 do not	update metaheader UIDs if related
		 UIDs in the dataset are modified

       error handling:

	 -ie   --ignore-errors
		 continue with file, if	modify error occurs

	 -imt  --ignore-missing-tags
		 treat 'tag not	found' as success
		 when modifying	or erasing in files

	 -iun  --ignore-un-values
		 do not	try writing any	values to elements
		 having	a VR of	UN

   output options
       output file format:

	 +F    --write-file
		 write file format (default)

	 -F    --write-dataset
		 write data set	without	file meta information

       output transfer syntax:

	 +t=   --write-xfer-same
		 write with same TS as input (default)

	 +te   --write-xfer-little
		 write with explicit VR	little endian TS

	 +tb   --write-xfer-big
		 write with explicit VR	big endian TS

	 +ti   --write-xfer-implicit
		 write with implicit VR	little endian TS

       post-1993 value representations:

	 +u    --enable-new-vr
		 enable	support	for new	VRs (UN/UT) (default)

	 -u    --disable-new-vr
		 disable support for new VRs, convert to OB

       group length encoding:

	 +g=   --group-length-recalc
		 recalculate group lengths if present (default)

	 +g    --group-length-create
		 always	write with group length	elements

	 -g    --group-length-remove
		 always	write without group length elements

       length encoding in sequences and	items:

	 +le   --length-explicit
		 write with explicit lengths (default)

	 -le   --length-undefined
		 write with undefined lengths

       data set	trailing padding (not with --write-dataset):

	 -p=   --padding-retain
		 do not	change padding (default	if not --write-dataset)

	 -p    --padding-off
		 no padding (implicit if --write-dataset)

	 +p    --padding-create	 [f]ile-pad [i]tem-pad:	integer
		 align file on multiple	of f bytes and items on
		 multiple of i bytes

       There are some issues you have to consider when	working	 with  private
       tags.  However,	the  insertion	or  modification  of a reservation tag
       (gggg,00xx) should always work.

       If you wish to insert a private tag (not	a reservation with gggg,00xx),
       be   sure,   that   you've   listed   it	  in   your   dictionary  (see
       _docdir_/datadict.txt for details). If it's not listed,	dcmodify  will
       insert  it with VR=UN. Also, for	some cases insertion may even fail for
       some values.

       If you've got your private tag in  the  dictionary,  dcmodify  acts  as
       follows:	 When  it  finds a reservation in the tag's enclosing dataset,
       whose private creator matches, insertion	is done	with the VR  found  in
       the  dictionary and the value given on command line. But	if the private
       creator doesn't match or	none is	set,  dcmodify	will  return  with  an
       error.  If  a  private  tag  should  be	inserted  regardless whether a
       reservation does	not exist, the option -nrc can	be  used,  forcing  an
       insertion.  However,  the  VR  is  set to UN then, because the tag then
       cannot be found in the dictionary.

       See description above how inserting values into elements	 with  unknown
       VR are handled.

       If you modify a private tags value, dcmodify won't check	its VR against
       the dictionary. So please be careful to enter only  values  that	 match
       the tag's VR.

       If  you	wish  to  change a private tags	value and VR, because you just
       added this tag to your dictionary, you can delete it with dcmodify  and
       re-insert it. Then dcmodify uses	your dictionary	entry to determine the
       right VR	(also see subsection insertions).

       Also, see description above how inserting  values  into	elements  with
       unknown VR are handled.

       When  you use dcmodify to delete	a private reservation tag, please note
       that dcmodify  won't  touch  the	 private  tags	that  are  under  this
       reservation.  The  user	is  forced  to	handle the consistency between
       reservations and	their associated private tags.

       For the deletion	of private non-reservation tags	there are  no  special

       dcmodify	 will  automatically correct 'Media Storage SOP	Class UID' and
       'Media Storage SOP Instance UID'	in the metaheader, if you make changes
       to  the	related	tags in	the dataset ('SOP Class	UID' and 'SOP Instance
       UID') via insert	or modify mode options.	You can	disable	this  behavior
       by using	the -nmu option.

       If  you	generate  new  UID's  with  -gst, -gse or -gin,	this will only
       affect the UID you chose	to generate. So	if you use -gst	to generate  a
       new  'Study Instance UID', then 'Series Instance	UID' and 'SOP Instance
       UID' will not be	affected! This gives you the possibility  to  generate
       each value separately. Normally,	you would also modify the 'underlying'
       UIDs. As	a disadvantage of this flexibility, the	user  has  to  assure,
       that when creating 'new'	DICOM files with new UIDs with dcmodify, other
       UIDs have to be updated by the user as necessary.

       When choosing the -gin  option,	the  related  metaheader  tag  ('Media
       Storage	SOP  Instance  UID')  is  updated automatically. This behavior
       cannot be disabled.

       Option --create-file lets dcmodify create a file	if it does not already
       exist  on  disk.	This can be used in order to create files from scratch
       by performing consecutive insertions with options like  --insert.  This
       might  especially become	handy when creating query files	for tools like
       findscu or movescu. In case  no	specific  output  transfer  syntax  is
       defined,	 dcmodify  chooses  Little  Endian  Explicit  Uncompressed for
       output. Files that are newly created are	always written as  DICOM  file
       format,	i.e.  option  --write-dataset  is  not permitted together with
       --create. This way, at least the	metaheader is written and no file with
       zero byte length	is created in a	case where no insertions are performed
       in the dcmodify call.

       In order	to read	the element value from a file instead of specifying it
       on  the	command	line, option -mf and -if can be	used. Please note that
       for OW elements,	the data is expected to	be little endian  ordered  and
       will  be	 swapped  if necessary.	The file size should always be an even
       number of bytes,	i.e. no	automatic padding is performed.

       dcmodify	also permits the usage of a wildcard character	'*'  for  item
       numbers	 in   path  expressions,  e.g.	'ContentSequence[*].CodeValue'
       selects	all  'Code   Value'   attributes   in	all   items   of   the
       ContentSequence.	Using a	wildcard is possible for all basic operations,
       i.e. modifying -m, inserting -i and -e options which makes it, together
       with  the automatic creation of intermediate path nodes a powerful tool
       for construction	and processing complex datasets.

       The options -ma and -ea for modifying or	deleting all occurrences of  a
       DICOM  element  based  on  its tag do not accept	any wildcards but only
       work on single elements (i.e. a single dictionary name or tag key).

       -i   --insert:
	      dcmodify -i "(0010,0010)=A Name" file.dcm
	      Inserts the PatientName tag into 'file.dcm' at 1st level.
	      If tag already exists, -i	will overwrite it!  If you want	to
	      insert an	element	with value multiplicity	> 1 (e.g. 4) you
	      can do this with:	dcmodify -i "(0018,1310)=1\2\3\4"

	      dcmodify -i "(0008,1111)[0].PatientName=Another Name" *.dcm
	      Inserts PatientName tag into the first item of sequence
	      (0008,1111).  Note that the use of wildcards for files is
	      possible.	 You can specify longer	tag paths, too (e.g.
	      "(0008,1111)[0].(0008,1111)[1].(0010,0010)=A Third One").
	      If any part of the path, e.g. the	sequence or the	item "0"
	      does not exist, it is automatically inserted by dcmodify.

	      dcmodify -i "(0008,1111)[*].PatientName=Another Name" *.dcm
	      Inserts PatientName tag into _every_ item	of sequence
	      (0008,1111).  Note that the use of wildcards for files is
	      possible.	 You can specify longer	tag paths, too (e.g.
	      "(0008,1111)[*].(0008,1111)[*].(0010,0010)=A Third One").

       -if  --insert-from-file:
	      dcmodify -if "PixelData=pixel.raw" file.dcm
	      Inserts the content of file 'pixel.raw' into the PixelData element
	      of 'file.dcm'.  The contents of the file will be read as is.
	      OW data is expected to be	little endian ordered and will be
	      swapped if necessary.  No	checks will be made to ensure that the
	      amount of	data is	reasonable in terms of other attributes	such as
	      Rows or Columns.

       -m   --modify:
	      dcmodify -m "(0010,0010)=A Name" file.dcm
	      Changes tag (0010,0010) on 1st level to "A Name".

	      This option also permits longer tag paths	as demonstrated
	      above for	-i. If the leaf	element	or any intermediate
	      part of the path does not	exist, it is not inserted as it
	      would be if using	the '-i' option.

	      dcmodify -m "(0010,0010)=A Name" -imt file.dcm
	      Changes tag (0010,0010) on 1st level to "A Name".	Due to the
	      given option '-imt', success is returned instead of "tag not found",
	      if the element/item (or any intermediate node in a longer	path) does
	      not exist.

	      Note that	for the	'-m' option the	last node in the path must be
	      a	leaf element, i.e. not a sequence or an	item.

       -mf  --modify-from-file:
	      dcmodify -mf "PixelData=pixel.raw" file.dcm
	      Does the same as -if in case there was already a PixelData element
	      in 'file.dcm'.  Otherwise	nothing	is changed.

       -ma  --modify-all:
	      dcmodify -ma "(0010,0010)=New Name" file.dcm
	      Does the same as -m but works on all matching tags found in
	      'file.dcm'.  Therefore, it searches the whole dataset including
	      sequences	for tag	(0010,0010) and	changes	them to	"New Name"

       -e   --erase:
	      dcmodify -e "(0010,0010)"	*.dcm
	      Erases tag (0010,0010) in	all *.dcm files	at 1st level.

	      This option also allows longer tag paths as demonstrated
	      above for	-i.

	      dcmodify -e "(0010,0010)"	-imt *.dcm
	      Erases tag (0010,0010) in	all *.dcm files	at 1st level. Due to the
	      given option '-imt', success is returned instead of "tag not found",
	      if the element/item (or any intermediate node in a longer	path) does
	      not exist.

       -ea  --erase-all:
	      dcmodify -ea "(0010,0010)" *.dcm
	      Same as -e, but also searches in sequences and items.

       -ep  --erase-private:
	      dcmodify -ep *.dcm
	      Deletes all private tags (i.e. tags having an odd	group number) from
	      all files	matching *.dcm in the current directory.

       -gst --gen-stud-uid:
	      dcmodify -gst file.dcm
	      This generates a new value for the StudyInstanceUID
	      (0020,000d).  Other UIDs are not modified!

       -gse --gen-ser-uid:
	      dcmodify -gse file.dcm
	      This generates a new value for the SeriesInstanceUID
	      (0020,000e).  Other UIDs are not modified!

       -gin --gen-inst-uid:
	      dcmodify -gin file.dcm
	      This command generates a new value for the SOPInstanceUID
	      (0008,0018).  The	corresponding MediaStorageSOPInstanceUID
	      (0002,0003) is adjusted to the new value automatically.
	      Please note that it's not	possible to avoid this metaheader
	      update via the -nmu option.

       -nmu --no-meta-uid:
	      dcmodify -m "SOPInstanceUID=[UID]" -nmu *.dcm
	      This will	modify the SOPInstanceUID to the given [UID],
	      but -nmu avoids, that dcmodify adjusts the
	      MediaStorageSOPInstanceUID in the	metaheader,

       dcmodify	tries executing	each modify operation given on	command	 line:
       If one returns an error,	the others are being performed anyway. However
       in case of any error, the  modified  file  is  not  saved,  unless  the
       --ignore-errors	option	is  specified.	If  that  option  is selected,
       dcmodify	also continues modifying further files	specified  on  command
       line;   otherwise   dcmodify  exits  after  the	first  file  that  had
       modification errors.

       If the --ignore-missing-tags option is enabled,	any  modify  or	 erase
       operations (i.e.	not --insert) that fails because of a non-existing tag
       is treated as being successful. That does make sense if	someone	 wants
       to  be sure that	specific tags are not present in the file or that - if
       they exist - that they are set to a specific value.

       The level of logging output of  the  various  command  line  tools  and
       underlying  libraries  can  be  specified by the	user. By default, only
       errors and warnings are written to the  standard	 error	stream.	 Using
       option  --verbose  also	informational messages like processing details
       are reported. Option --debug can	be used	to get	more  details  on  the
       internal	 activity,  e.g.  for debugging	purposes. Other	logging	levels
       can be selected using option --log-level. In --quiet  mode  only	 fatal
       errors  are reported. In	such very severe error events, the application
       will usually terminate. For  more  details  on  the  different  logging
       levels, see documentation of module 'oflog'.

       In  case	 the logging output should be written to file (optionally with
       logfile rotation), to syslog (Unix) or the event	log  (Windows)	option
       --log-config  can  be  used.  This  configuration  file also allows for
       directing only certain messages to a particular output stream  and  for
       filtering  certain  messages  based  on the module or application where
       they are	generated.  An	example	 configuration	file  is  provided  in

       All  command  line  tools  use  the  following notation for parameters:
       square brackets enclose optional	 values	 (0-1),	 three	trailing  dots
       indicate	 that multiple values are allowed (1-n), a combination of both
       means 0 to n values.

       Command line options are	distinguished from parameters by a leading '+'
       or  '-' sign, respectively. Usually, order and position of command line
       options are arbitrary (i.e. they	 can  appear  anywhere).  However,  if
       options	are  mutually exclusive	the rightmost appearance is used. This
       behavior	conforms to the	 standard  evaluation  rules  of  common  Unix

       In  addition,  one  or more command files can be	specified using	an '@'
       sign as a prefix	to the filename	(e.g. @command.txt).  Such  a  command
       argument	 is  replaced  by  the	content	of the corresponding text file
       (multiple whitespaces are treated as a  single  separator  unless  they
       appear  between	two  quotation marks) prior to any further evaluation.
       Please note that	a command file cannot contain  another	command	 file.
       This  simple  but  effective  approach  allows  one to summarize	common
       combinations of options/parameters and  avoids  longish	and  confusing
       command lines (an example is provided in	file _datadir_/dumppat.txt).

       The  dcmodify  utility  will  attempt  to  load DICOM data dictionaries
       specified in the	DCMDICTPATH environment	variable. By default, i.e.  if
       the   DCMDICTPATH   environment	 variable   is	 not   set,  the  file
       _datadir_/dicom.dic will	be loaded unless the dictionary	is built  into
       the application (default	for Windows).

       The   default   behavior	  should  be  preferred	 and  the  DCMDICTPATH
       environment variable only used when alternative data  dictionaries  are
       required.  The  DCMDICTPATH environment variable	has the	same format as
       the Unix	shell PATH variable in that a colon (':')  separates  entries.
       On  Windows systems, a semicolon	(';') is used as a separator. The data
       dictionary code will  attempt  to  load	each  file  specified  in  the
       DCMDICTPATH  environment	variable. It is	an error if no data dictionary
       can be loaded.

       Copyright (C) 2003-2014 by OFFIS	e.V., Escherweg	 2,  26121  Oldenburg,

Version	3.6.5			Mon Oct	28 2019			   dcmodify(1)


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