Anonymizer This class is a multi purpose anonymizer. It can work in 2 mode: More...

#include <gdcmAnonymizer.h>

Inheritance diagram for gdcm::Anonymizer:

Collaboration diagram for gdcm::Anonymizer:

Public Member Functions
	Anonymizer ()

	~Anonymizer ()

bool	BasicApplicationLevelConfidentialityProfile (bool deidentify=true)

bool	Empty (Tag const &t)

const CryptographicMessageSyntax *	GetCryptographicMessageSyntax () const

File &	GetFile ()

bool	Remove (Tag const &t)

bool	RemoveGroupLength ()
	Main function that loop over all elements and remove group length. More...

bool	RemovePrivateTags ()
	Main function that loop over all elements and remove private tags. More...

bool	RemoveRetired ()
	Main function that loop over all elements and remove retired element. More...

bool	Replace (Tag const &t, const char *value)

bool	Replace (Tag const &t, const char *value, VL const &vl)

void	SetCryptographicMessageSyntax (CryptographicMessageSyntax *cms)
	Set/Get CMS key that will be used to encrypt the dataset within BasicApplicationLevelConfidentialityProfile. More...

void	SetFile (const File &f)
	Set/Get File. More...

Public Member Functions inherited from gdcm::Subject
	Subject ()

	~Subject ()

unsigned long	AddObserver (const Event &event, Command *)

unsigned long	AddObserver (const Event &event, Command *) const

Command *	GetCommand (unsigned long tag)

bool	HasObserver (const Event &event) const

void	InvokeEvent (const Event &)

void	InvokeEvent (const Event &) const

void	RemoveAllObservers ()

void	RemoveObserver (unsigned long tag)

Public Member Functions inherited from gdcm::Object
	Object ()

	Object (const Object &)
	Special requirement for copy/cstor, assigment operator. More...

virtual	~Object ()

void	operator= (const Object &)

virtual void	Print (std::ostream &) const

Static Public Member Functions
static std::vector< Tag >	GetBasicApplicationLevelConfidentialityProfileAttributes ()
	Return the list of Tag that will be considered when anonymizing a DICOM file. More...

static SmartPointer< Anonymizer >	New ()
	for wrapped language: instantiate a reference counted object More...

Protected Member Functions
bool	BALCPProtect (DataSet &ds, Tag const &tag, const IOD &iod)

bool	CanEmptyTag (Tag const &tag, const IOD &iod) const

void	RecurseDataSet (DataSet &ds)

Protected Member Functions inherited from gdcm::Object
void	Register ()

void	UnRegister ()

Detailed Description

Anonymizer This class is a multi purpose anonymizer. It can work in 2 mode:

Full (irreversible) anonymizer (aka dumb mode)
reversible de-identifier/re-identifier (aka smart mode). This implements the Basic Application Level Confidentiality Profile, DICOM PS 3.15-2009

dumb mode This is a dumb anonymizer implementation. All it allows user is simple operation such as:

Tag based functions:

complete removal of DICOM attribute (Remove)
make a tag empty, ie make it's length 0 (Empty)
replace with another string-based value (Replace)

DataSet based functions:

Remove all group length attribute from a DICOM dataset (Group Length element are deprecated, DICOM 2008)
Remove all private attributes
Remove all retired attributes

All function calls actually execute the user specified request. Previous implementation were calling a general Anonymize function but traversing a std::set is O(n) operation, while a simple user specified request is O(log(n)) operation. So 'm' user interaction is O(m*log(n)) which is < O(n) complexity.

smart mode this mode implements the Basic Application Level Confidentiality Profile (DICOM PS 3.15-2008) In this case, it is extremely important to use the same gdcm::Anonymizer class when anonymizing a FileSet. Once the gdcm::Anonymizer is destroyed its memory of known (already processed) UIDs will be lost. which will make the anonymizer behaves incorrectly for attributes such as Series UID Study UID where user want some consistency. When attribute is Type 1 / Type 1C, a dummy generator will take in the existing value and produce a dummy value (a sha1 representation). sha1 algorithm is considered to be cryptographically strong (compared to md5sum) so that we meet the following two conditions:
- Produce the same dummy value for the same input value
- do not provide an easy way to retrieve the original value from the sha1 generated value

This class implement the Subject/Observer pattern trigger the following event:

See Also: CryptographicMessageSyntax

Examples:: ClinicalTrialAnnotate.cxx, CreateJPIPDataSet.cxx, and EncapsulateFileInRawData.cxx.

Constructor & Destructor Documentation

gdcm::Anonymizer::Anonymizer ( )

inline

gdcm::Anonymizer::~Anonymizer ( )

Member Function Documentation

bool gdcm::Anonymizer::BALCPProtect	(	DataSet &	ds,
		Tag const &	tag,
		const IOD &	iod
	)

protected

bool gdcm::Anonymizer::BasicApplicationLevelConfidentialityProfile ( bool deidentify = true )

PS 3.15 / E.1.1 De-Identifier An Application may claim conformance to the Basic Application Level Confidentiality Profile as a deidentifier if it protects all Attributes that might be used by unauthorized entities to identify the patient. NOT THREAD SAFE

bool gdcm::Anonymizer::CanEmptyTag	(	Tag const &	tag,
		const IOD &	iod
	)		const

protected

bool gdcm::Anonymizer::Empty ( Tag const & t )

Make Tag t empty (if not found tag will be created) Warning: does not handle SQ element

Examples:: CreateJPIPDataSet.cxx.

static std::vector<Tag> gdcm::Anonymizer::GetBasicApplicationLevelConfidentialityProfileAttributes ( )

static

Return the list of Tag that will be considered when anonymizing a DICOM file.

Examples:: GenFakeIdentifyFile.cxx, and TraverseModules.cxx.

const CryptographicMessageSyntax* gdcm::Anonymizer::GetCryptographicMessageSyntax ( ) const

File& gdcm::Anonymizer::GetFile ( )

inline

static SmartPointer<Anonymizer> gdcm::Anonymizer::New ( )

inlinestatic

for wrapped language: instantiate a reference counted object

void gdcm::Anonymizer::RecurseDataSet ( DataSet & ds )

protected

bool gdcm::Anonymizer::Remove ( Tag const & t )

remove a tag (even a SQ can be removed) Return code is false when tag t cannot be found

bool gdcm::Anonymizer::RemoveGroupLength ( )

Main function that loop over all elements and remove group length.

Examples:: ClinicalTrialAnnotate.cxx.

bool gdcm::Anonymizer::RemovePrivateTags ( )

Main function that loop over all elements and remove private tags.

Examples:: ClinicalTrialAnnotate.cxx.

bool gdcm::Anonymizer::RemoveRetired ( )

Main function that loop over all elements and remove retired element.

bool gdcm::Anonymizer::Replace	(	Tag const &	t,
		const char *	value
	)

Replace tag with another value, if tag is not found it will be created: WARNING: this function can only execute if tag is a VRASCII

Examples:: ClinicalTrialAnnotate.cxx, CreateJPIPDataSet.cxx, and EncapsulateFileInRawData.cxx.

bool gdcm::Anonymizer::Replace	(	Tag const &	t,
		const char *	value,
		VL const &	vl
	)

when the value contains \0, it is a good idea to specify the length. This function is required when dealing with VRBINARY tag

void gdcm::Anonymizer::SetCryptographicMessageSyntax ( CryptographicMessageSyntax * cms )

Set/Get CMS key that will be used to encrypt the dataset within BasicApplicationLevelConfidentialityProfile.

void gdcm::Anonymizer::SetFile ( const File & f )

inline

Set/Get File.

Examples:: ClinicalTrialAnnotate.cxx, CreateJPIPDataSet.cxx, and EncapsulateFileInRawData.cxx.

The documentation for this class was generated from the following file:

gdcmAnonymizer.h

Public Member Functions

Static Public Member Functions

Protected Member Functions

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation