NAME¶
wlmscpfs - DICOM Basic Worklist Management SCP (based on data files)
SYNOPSIS¶
wlmscpfs [options] port
DESCRIPTION¶
The
wlmscpfs application implements a Service Class Provider (SCP) for
the Basic Worklist Management Service. The application will listen on a
specified TCP/IP port for incoming association requests from a Worklist
Management SCU. In case an association was acknowledged and a worklist query
was received, the
wlmscpfs application will query particular files in a
certain directory (which can be specified through corresponding program
options) on the file system for corresponding worklist information, and it
will send this information back to the calling Worklist Management SCU. Aside
from dealing with Worklist Management queries, the
wlmscpfs application
also supports the Verification Service Class as an SCP.
PARAMETERS¶
port tcp/ip port number to listen on
OPTIONS¶
general options¶
-h --help
print this help text and exit
--version
print version information and exit
--arguments
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
multi-process options¶
-s --single-process
single process mode
--fork
fork child process for each association (default)
general:
-dfp --data-files-path [p]ath: string (default: /home/www/wlist)
path to worklist data files
handling of worklist files:
-efr --enable-file-reject
enable rejection of incomplete worklist files (default)
-dfr --disable-file-reject
disable rejection of incomplete worklist files
processing options¶
returned character set:
-cs0 --return-no-char-set
return no specific character set (default)
-cs1 --return-iso-ir-100
return specific character set ISO IR 100
-csk --keep-char-set
return character set provided in file
other processing options:
-nse --no-sq-expansion
disable expansion of empty sequences in C-FIND
request messages
network options¶
preferred network transfer syntaxes:
+x= --prefer-uncompr
prefer explicit VR local byte order (default)
+xe --prefer-little
prefer explicit VR little endian TS
+xb --prefer-big
prefer explicit VR big endian TS
+xi --implicit
accept implicit VR little endian TS only
network host access control (tcp wrapper):
-ac --access-full
accept connections from any host (default)
+ac --access-control
enforce host access control rules
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
other network options:
-ta --acse-timeout [s]econds: integer (default: 30)
timeout for ACSE messages
-td --dimse-timeout [s]econds: integer (default: unlimited)
timeout for DIMSE messages
--max-associations [a]ssocs: integer (default: 50)
limit maximum number of parallel associations
--refuse
refuse association
--reject
reject association if no implementation class UID
--no-fail
don't fail on an invalid query
--sleep-after [s]econds: integer
sleep s seconds after find (default: 0)
--sleep-during [s]econds: integer
sleep s seconds during find (default: 0)
-pdu --max-pdu [n]umber of bytes: integer (4096..131072)
set max receive pdu to n bytes (default: 16384)
-dhl --disable-host-lookup
disable hostname lookup
NOTES¶
The semantic impacts of the above mentioned options is clear for the majority of
options. Some particular options, however, are so specific that they need
detailed descriptions which will be given in this passage.
The returned character set options are intended for situations in which the
wlmscpfs application will return attribute values which are not
composed of characters from the DICOM default character repertoire. In such
cases, for example option
--return-iso-ir-100 can be used to specify
that a response to a modality's worklist management C-FIND request shall
contain DICOM's Specific Character Set attribute (0008,0005) with a
corresponding value, indicating the character repertoire from which the
characters of returned attribute values were taken (in this example the
repertoire ISO IR 100). Please note that the
wlmscpfs application will
not make sure that all returned values are actually made up of this character
repertoire; the application expects this to be the case.
In general, the Specific Character Set attribute (0008,0005) will only be
included in the C-FIND response if it contains any attributes that are
affected by the character set, i.e. for value representations PN, LO, LT, SH,
ST and UT.
Please note that a C-FIND request which is handled by this application may
contain DICOM's Specific Character Set attribute (0008,0005), but this
application will never use this attribute's value for matching. Besides, the
question if DICOM's Specific Character Set attribute (0008,0005) will be
contained in a C-FIND response which is returned by this application is always
determined by the returned character set option which was specified when this
application was started.
The options --enable-file-reject and --disable-file-reject can be used to enable
or disable a file rejection mechanism which makes sure only complete worklist
files will be used during the matching process. A worklist file is considered
to be complete if it contains all necessary type 1 information which the SCP
might have to return to an SCU in a C-FIND response message. Table K.6-1 in
part 4 annex K of the DICOM standard lists all corresponding type 1 attributes
(see column 'Return Key Type').
The
wlmscpfs application supports the following SOP Classes as an SCP:
VerificationSOPClass 1.2.840.10008.1.1
FINDModalityWorklistInformationModel 1.2.840.10008.5.1.4.31
The
wlmscpfs application will accept presentation contexts for all of the
abovementioned supported SOP Classes using any of the transfer syntaxes:
LittleEndianImplicitTransferSyntax 1.2.840.10008.1.2
LittleEndianExplicitTransferSyntax 1.2.840.10008.1.2.1
BigEndianExplicitTransferSyntax 1.2.840.10008.1.2.2
The default behaviour of the
wlmscpfs application is to prefer transfer
syntaxes having an explicit encoding over the default implicit transfer
syntax. If
wlmscpfs is running on big-endian hardware it will prefer
BigEndianExplicit to LittleEndianExplicit transfer syntax (and vice versa).
This behaviour can be changed with the
--prefer options (see above).
The
wlmscpfs application does not support extended negotiation.
Currently, the
wlmscpfs application supports the following attributes as
matching keys:
(0008,0050) AccessionNumber
(0008,0090) ReferringPhysicianName
(0010,0010) PatientName
(0010,0020) PatientID
(0010,0030) PatientBirthDate
(0010,0040) PatientSex
(0032,1032) RequestingPhysician
(0038,0010) AdmissionID
(0040,0100) ScheduledProcedureStepSequence
(0008,0060) > Modality
(0040,0001) > ScheduledStationAETitle
(0040,0002) > ScheduledProcedureStepStartDate
(0040,0003) > ScheduledProcedureStepStartTime
(0040,0006) > ScheduledPerformingPhysicianName
(0040,1001) RequestedProcedureID
(0040,1003) RequestedProcedurePriority
As return keys the following attributes are currently supported by
wlmscpfs:
(0008,0050) AccessionNumber
(0008,0080) InstitutionName
(0008,0081) InstitutionAddress
(0008,0090) ReferringPhysicianName
(0008,1080) AdmittingDiagnosesDescription
(0008,1110) ReferencedStudySequence
(0008,1150) > ReferencedSOPClassUID
(0008,1155) > ReferencedSOPInstanceUID
(0008,1120) ReferencedPatientSequence
(0008,1150) > ReferencedSOPClassUID
(0008,1155) > ReferencedSOPInstanceUID
(0010,0010) PatientName
(0010,0020) PatientID
(0010,0030) PatientBirthDate
(0010,0040) PatientSex
(0010,1000) OtherPatientIDs
(0010,1001) OtherPatientNames
(0010,1020) PatientSize
(0010,1030) PatientWeight
(0010,1040) PatientAddress
(0010,1080) MilitaryRank
(0010,2000) MedicalAlerts
(0010,2110) ContrastAllergies
(0010,2160) EthnicGroup
(0010,21a0) SmokingStatus
(0010,21b0) AdditionalPatientHistory
(0010,21c0) PregnancyStatus
(0010,21d0) LastMenstrualDate
(0010,4000) PatientComments
(0020,000d) StudyInstanceUID
(0032,1032) RequestingPhysician
(0032,1033) RequestingService
(0032,1060) RequestedProcedureDescription
(0032,1064) RequestedProcedureCodeSequence
(0008,0100) > CodeValue
(0008,0102) > CodingSchemeDesignator
(0008,0103) > CodingSchemeVersion
(0008,0104) > CodeMeaning
(0038,0010) AdmissionID
(0038,0011) IssuerOfAdmissionID
(0038,0050) SpecialNeeds
(0038,0300) CurrentPatientLocation
(0038,0500) PatientState
(0040,0100) ScheduledProcedureStepSequence
(0008,0060) > Modality
(0032,1070) > RequestedContrastAgent
(0040,0001) > ScheduledStationAETitle
(0040,0002) > ScheduledProcedureStepStartDate
(0040,0003) > ScheduledProcedureStepStartTime
(0040,0004) > ScheduledProcedureStepEndDate
(0040,0005) > ScheduledProcedureStepEndTime
(0040,0006) > ScheduledPerformingPhysicianName
(0040,0007) > ScheduledProcedureStepDescription
(0040,0008) > ScheduledProtocolCodeSequence
(0008,0100) > > CodeValue
(0008,0102) > > CodingSchemeDesignator
(0008,0103) > > CodingSchemeVersion
(0008,0104) > > CodeMeaning
(0040,0009) > ScheduledProcedureStepID
(0040,0010) > ScheduledStationName
(0040,0011) > ScheduledProcedureStepLocation
(0040,0012) > PreMedication
(0040,0020) > ScheduledProcedureStepStatus
(0040,0400) > CommentsOnTheScheduledProcedureStep
(0040,1001) RequestedProcedureID
(0040,1002) ReasonForTheRequestedProcedure
(0040,1003) RequestedProcedurePriority
(0040,1004) PatientTransportArrangements
(0040,1005) RequestedProcedureLocation
(0040,1008) ConfidentialityCode
(0040,1009) ReportingPriority
(0040,1010) NamesOfIntendedRecipientsOfResults
(0040,1400) RequestedProcedureComments
(0040,2001) ReasonForTheImagingServiceRequest
(0040,2004) IssueDateOfImagingServiceRequest
(0040,2005) IssueTimeOfImagingServiceRequest
(0040,2008) OrderEnteredBy
(0040,2009) OrderEnterersLocation
(0040,2010) OrderCallbackPhoneNumber
(0040,2016) PlacerOrderNumberImagingServiceRequest
(0040,2017) FillerOrderNumberImagingServiceRequest
(0040,2400) ImagingServiceRequestComments
(0040,3001) ConfidentialityConstraintOnPatientDataDescription
The attribute (0008,0005) SpecificCharacterSet is a special case and its support
by
wlmscpfs is discussed in the NOTES section above.
Access Control¶
When compiled on Unix platforms with TCP wrapper support, host-based access
control can be enabled with the
--access-control command line option.
In this case the access control rules defined in the system's host access
control tables for
wlmscpfs are enforced. The default locations of the
host access control tables are
/etc/hosts.allow and
/etc/hosts.deny. Further details are described in
hosts_access(5).
LOGGING¶
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
<etcdir>/logger.cfg).
COMMAND LINE¶
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 behaviour conforms to the
standard evaluation rules of common Unix shells.
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 to
summarize common combinations of options/parameters and avoids longish and
confusing command lines (an example is provided in file
<datadir>/dumppat.txt).
ENVIRONMENT¶
The
wlmscpfs 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 behaviour 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¶
Copyright (C) 1996-2010 by OFFIS e.V., Escherweg 2, 26121 Oldenburg,
Germany.