DCMTK
Version 3.6.4
OFFIS DICOM Toolkit
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Public Member Functions | |
Item (const OFBool emptyDefaultItem=OFFalse) | |
(default) constructor More... | |
Item (const Item ©) | |
copy constructor More... | |
virtual | ~Item () |
destructor | |
Item & | operator= (const Item ©) |
assigment operator More... | |
void | clear () |
clear all internal member variables | |
OFBool | isEmpty () |
check if item is empty More... | |
OFBool | isValid () const |
check if item is valid, i.e. not the empty default item More... | |
OFCondition | read (DcmItem &item) |
read elements from sequence item More... | |
OFCondition | write (DcmItem &item) |
write elements to sequence item More... | |
OFCondition | getBitsAllocated (Uint16 &value, const unsigned long pos=0) const |
get BitsAllocated (0028,0100) More... | |
OFCondition | getBitsStored (Uint16 &value, const unsigned long pos=0) const |
get BitsStored (0028,0101) More... | |
OFCondition | getBluePaletteColorLookupTableData (Uint16 *&value, unsigned long *count=NULL) const |
get BluePaletteColorLookupTableData (0028,1203) More... | |
OFCondition | getBluePaletteColorLookupTableDescriptor (Uint16 &value, const unsigned long pos=0) const |
get BluePaletteColorLookupTableDescriptor (0028,1103) More... | |
OFCondition | getColorSpace (OFString &value, const signed long pos=0) const |
get ColorSpace (0028,2002) More... | |
OFCondition | getColumns (Uint16 &value, const unsigned long pos=0) const |
get Columns (0028,0011) More... | |
OFCondition | getGreenPaletteColorLookupTableData (Uint16 *&value, unsigned long *count=NULL) const |
get GreenPaletteColorLookupTableData (0028,1202) More... | |
OFCondition | getGreenPaletteColorLookupTableDescriptor (Uint16 &value, const unsigned long pos=0) const |
get GreenPaletteColorLookupTableDescriptor (0028,1102) More... | |
OFCondition | getHighBit (Uint16 &value, const unsigned long pos=0) const |
get HighBit (0028,0102) More... | |
OFCondition | getICCProfile (Uint8 *&value, unsigned long *count=NULL) const |
get ICCProfile (0028,2000) More... | |
OFCondition | getLargestImagePixelValue (Uint16 &value, const unsigned long pos=0) const |
get LargestImagePixelValue (0028,0107) More... | |
OFCondition | getPhotometricInterpretation (OFString &value, const signed long pos=0) const |
get PhotometricInterpretation (0028,0004) More... | |
OFCondition | getPixelAspectRatio (OFString &value, const signed long pos=0) const |
get PixelAspectRatio (0028,0034) More... | |
OFCondition | getPixelAspectRatio (Sint32 &value, const unsigned long pos=0) const |
get PixelAspectRatio (0028,0034) More... | |
OFCondition | getPixelRepresentation (Uint16 &value, const unsigned long pos=0) const |
get PixelRepresentation (0028,0103) More... | |
OFCondition | getPlanarConfiguration (Uint16 &value, const unsigned long pos=0) const |
get PlanarConfiguration (0028,0006) More... | |
OFCondition | getRedPaletteColorLookupTableData (Uint16 *&value, unsigned long *count=NULL) const |
get RedPaletteColorLookupTableData (0028,1201) More... | |
OFCondition | getRedPaletteColorLookupTableDescriptor (Uint16 &value, const unsigned long pos=0) const |
get RedPaletteColorLookupTableDescriptor (0028,1101) More... | |
OFCondition | getRows (Uint16 &value, const unsigned long pos=0) const |
get Rows (0028,0010) More... | |
OFCondition | getSamplesPerPixel (Uint16 &value, const unsigned long pos=0) const |
get SamplesPerPixel (0028,0002) More... | |
OFCondition | getSmallestImagePixelValue (Uint16 &value, const unsigned long pos=0) const |
get SmallestImagePixelValue (0028,0106) More... | |
DcmPixelData & | getPixelData () |
get PixelData (7fe0,0010) More... | |
const DcmPixelData & | getPixelData () const |
get PixelData (7fe0,0010) More... | |
OFCondition | setBitsAllocated (const Uint16 value, const unsigned long pos=0) |
set BitsAllocated (0028,0100) More... | |
OFCondition | setBitsStored (const Uint16 value, const unsigned long pos=0) |
set BitsStored (0028,0101) More... | |
OFCondition | setBluePaletteColorLookupTableData (const Uint16 *value, const unsigned long count) |
set BluePaletteColorLookupTableData (0028,1203) More... | |
OFCondition | setBluePaletteColorLookupTableDescriptor (const Uint16 value, const unsigned long pos=0) |
set BluePaletteColorLookupTableDescriptor (0028,1103) More... | |
OFCondition | setColorSpace (const OFString &value, const OFBool check=OFTrue) |
set ColorSpace (0028,2002) More... | |
OFCondition | setColumns (const Uint16 value, const unsigned long pos=0) |
set Columns (0028,0011) More... | |
OFCondition | setGreenPaletteColorLookupTableData (const Uint16 *value, const unsigned long count) |
set GreenPaletteColorLookupTableData (0028,1202) More... | |
OFCondition | setGreenPaletteColorLookupTableDescriptor (const Uint16 value, const unsigned long pos=0) |
set GreenPaletteColorLookupTableDescriptor (0028,1102) More... | |
OFCondition | setHighBit (const Uint16 value, const unsigned long pos=0) |
set HighBit (0028,0102) More... | |
OFCondition | setICCProfile (const Uint8 *value, const unsigned long count) |
set ICCProfile (0028,2000) More... | |
OFCondition | setLargestImagePixelValue (const Uint16 value, const unsigned long pos=0) |
set LargestImagePixelValue (0028,0107) More... | |
OFCondition | setPhotometricInterpretation (const OFString &value, const OFBool check=OFTrue) |
set PhotometricInterpretation (0028,0004) More... | |
OFCondition | setPixelAspectRatio (const OFString &value, const OFBool check=OFTrue) |
set PixelAspectRatio (0028,0034) More... | |
OFCondition | setPixelRepresentation (const Uint16 value, const unsigned long pos=0) |
set PixelRepresentation (0028,0103) More... | |
OFCondition | setPlanarConfiguration (const Uint16 value, const unsigned long pos=0) |
set PlanarConfiguration (0028,0006) More... | |
OFCondition | setRedPaletteColorLookupTableData (const Uint16 *value, const unsigned long count) |
set RedPaletteColorLookupTableData (0028,1201) More... | |
OFCondition | setRedPaletteColorLookupTableDescriptor (const Uint16 value, const unsigned long pos=0) |
set RedPaletteColorLookupTableDescriptor (0028,1101) More... | |
OFCondition | setRows (const Uint16 value, const unsigned long pos=0) |
set Rows (0028,0010) More... | |
OFCondition | setSamplesPerPixel (const Uint16 value, const unsigned long pos=0) |
set SamplesPerPixel (0028,0002) More... | |
OFCondition | setSmallestImagePixelValue (const Uint16 value, const unsigned long pos=0) |
set SmallestImagePixelValue (0028,0106) More... | |
Private Attributes | |
OFBool | EmptyDefaultItem |
internal flag used to mark the empty default item | |
DcmUnsignedShort | BitsAllocated |
BitsAllocated (0028,0100) vr=US, vm=1, type=1. | |
DcmUnsignedShort | BitsStored |
BitsStored (0028,0101) vr=US, vm=1, type=1. | |
DcmOtherByteOtherWord | BluePaletteColorLookupTableData |
BluePaletteColorLookupTableData (0028,1203) vr=OW, vm=1, type=1C. | |
DcmUnsignedShort | BluePaletteColorLookupTableDescriptor |
BluePaletteColorLookupTableDescriptor (0028,1103) vr=US/SS, vm=3, type=1C. | |
DcmCodeString | ColorSpace |
ColorSpace (0028,2002) vr=CS, vm=1, type=3. | |
DcmUnsignedShort | Columns |
Columns (0028,0011) vr=US, vm=1, type=1. | |
DcmOtherByteOtherWord | GreenPaletteColorLookupTableData |
GreenPaletteColorLookupTableData (0028,1202) vr=OW, vm=1, type=1C. | |
DcmUnsignedShort | GreenPaletteColorLookupTableDescriptor |
GreenPaletteColorLookupTableDescriptor (0028,1102) vr=US/SS, vm=3, type=1C. | |
DcmUnsignedShort | HighBit |
HighBit (0028,0102) vr=US, vm=1, type=1. | |
DcmOtherByteOtherWord | ICCProfile |
ICCProfile (0028,2000) vr=OB, vm=1, type=3. | |
DcmUnsignedShort | LargestImagePixelValue |
LargestImagePixelValue (0028,0107) vr=US/SS, vm=1, type=3. | |
DcmCodeString | PhotometricInterpretation |
PhotometricInterpretation (0028,0004) vr=CS, vm=1, type=1. | |
DcmIntegerString | PixelAspectRatio |
PixelAspectRatio (0028,0034) vr=IS, vm=2, type=1C. | |
DcmPixelData | PixelData |
PixelData (7fe0,0010) vr=OB/OW, vm=1, type=1. | |
DcmUnsignedShort | PixelRepresentation |
PixelRepresentation (0028,0103) vr=US, vm=1, type=1. | |
DcmUnsignedShort | PlanarConfiguration |
PlanarConfiguration (0028,0006) vr=US, vm=1, type=1C. | |
DcmOtherByteOtherWord | RedPaletteColorLookupTableData |
RedPaletteColorLookupTableData (0028,1201) vr=OW, vm=1, type=1C. | |
DcmUnsignedShort | RedPaletteColorLookupTableDescriptor |
RedPaletteColorLookupTableDescriptor (0028,1101) vr=US/SS, vm=3, type=1C. | |
DcmUnsignedShort | Rows |
Rows (0028,0010) vr=US, vm=1, type=1. | |
DcmUnsignedShort | SamplesPerPixel |
SamplesPerPixel (0028,0002) vr=US, vm=1, type=1. | |
DcmUnsignedShort | SmallestImagePixelValue |
SmallestImagePixelValue (0028,0106) vr=US/SS, vm=1, type=3. | |
Additional Inherited Members | |
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virtual | ~DRTTypes () |
destructor. More... | |
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static OFCondition | addElementToDataset (OFCondition &result, DcmItem &dataset, DcmElement *element, const OFString &vm, const OFString &type, const char *moduleName=NULL) |
add given element to the dataset. More... | |
static OFCondition | getElementFromDataset (DcmItem &dataset, DcmElement &element) |
get element from dataset More... | |
static OFCondition | getStringValueFromElement (const DcmElement &element, OFString &stringValue, const signed long pos=0) |
get string value from element More... | |
static OFCondition | getStringValueFromDataset (DcmItem &dataset, const DcmTagKey &tagKey, OFString &stringValue) |
get string value from dataset More... | |
static OFCondition | putStringValueToDataset (DcmItem &dataset, const DcmTag &tag, const OFString &stringValue, const OFBool allowEmpty=OFTrue) |
put string value to dataset More... | |
static OFBool | checkElementValue (DcmElement &element, const OFString &vm, const OFString &type, const OFCondition &searchCond=EC_Normal, const char *moduleName=NULL) |
check element value for correct value multiplicity and type More... | |
static OFCondition | getAndCheckElementFromDataset (DcmItem &dataset, DcmElement &element, const OFString &vm, const OFString &type, const char *moduleName=NULL) |
get element from dataset and check it for correct value multiplicity and type. More... | |
static OFCondition | getAndCheckStringValueFromDataset (DcmItem &dataset, const DcmTagKey &tagKey, OFString &stringValue, const OFString &vm, const OFString &type, const char *moduleName=NULL) |
get string value from dataset and check it for correct value multiplicity and type. More... | |
Item class.
DRTIconImageSequence::Item::Item | ( | const OFBool | emptyDefaultItem = OFFalse | ) |
(default) constructor
emptyDefaultItem | flag used to mark the empty default item |
DRTIconImageSequence::Item::Item | ( | const Item & | copy | ) |
copy constructor
copy | item object to be copied |
OFCondition DRTIconImageSequence::Item::getBitsAllocated | ( | Uint16 & | value, |
const unsigned long | pos = 0 |
||
) | const |
get BitsAllocated (0028,0100)
value | reference to variable in which the value should be stored |
pos | index of the value to get (0..vm-1) |
OFCondition DRTIconImageSequence::Item::getBitsStored | ( | Uint16 & | value, |
const unsigned long | pos = 0 |
||
) | const |
get BitsStored (0028,0101)
value | reference to variable in which the value should be stored |
pos | index of the value to get (0..vm-1) |
OFCondition DRTIconImageSequence::Item::getBluePaletteColorLookupTableData | ( | Uint16 *& | value, |
unsigned long * | count = NULL |
||
) | const |
get BluePaletteColorLookupTableData (0028,1203)
value | reference to variable in which the value should be stored |
count | stores number of items in the result array (if not NULL) |
OFCondition DRTIconImageSequence::Item::getBluePaletteColorLookupTableDescriptor | ( | Uint16 & | value, |
const unsigned long | pos = 0 |
||
) | const |
get BluePaletteColorLookupTableDescriptor (0028,1103)
value | reference to variable in which the value should be stored |
pos | index of the value to get (0..vm-1) |
OFCondition DRTIconImageSequence::Item::getColorSpace | ( | OFString & | value, |
const signed long | pos = 0 |
||
) | const |
get ColorSpace (0028,2002)
value | reference to variable in which the value should be stored |
pos | index of the value to get (0..vm-1), -1 for all components |
OFCondition DRTIconImageSequence::Item::getColumns | ( | Uint16 & | value, |
const unsigned long | pos = 0 |
||
) | const |
get Columns (0028,0011)
value | reference to variable in which the value should be stored |
pos | index of the value to get (0..vm-1) |
OFCondition DRTIconImageSequence::Item::getGreenPaletteColorLookupTableData | ( | Uint16 *& | value, |
unsigned long * | count = NULL |
||
) | const |
get GreenPaletteColorLookupTableData (0028,1202)
value | reference to variable in which the value should be stored |
count | stores number of items in the result array (if not NULL) |
OFCondition DRTIconImageSequence::Item::getGreenPaletteColorLookupTableDescriptor | ( | Uint16 & | value, |
const unsigned long | pos = 0 |
||
) | const |
get GreenPaletteColorLookupTableDescriptor (0028,1102)
value | reference to variable in which the value should be stored |
pos | index of the value to get (0..vm-1) |
OFCondition DRTIconImageSequence::Item::getHighBit | ( | Uint16 & | value, |
const unsigned long | pos = 0 |
||
) | const |
get HighBit (0028,0102)
value | reference to variable in which the value should be stored |
pos | index of the value to get (0..vm-1) |
OFCondition DRTIconImageSequence::Item::getICCProfile | ( | Uint8 *& | value, |
unsigned long * | count = NULL |
||
) | const |
get ICCProfile (0028,2000)
value | reference to variable in which the value should be stored |
count | stores number of items in the result array (if not NULL) |
OFCondition DRTIconImageSequence::Item::getLargestImagePixelValue | ( | Uint16 & | value, |
const unsigned long | pos = 0 |
||
) | const |
get LargestImagePixelValue (0028,0107)
value | reference to variable in which the value should be stored |
pos | index of the value to get (0..vm-1) |
OFCondition DRTIconImageSequence::Item::getPhotometricInterpretation | ( | OFString & | value, |
const signed long | pos = 0 |
||
) | const |
get PhotometricInterpretation (0028,0004)
value | reference to variable in which the value should be stored |
pos | index of the value to get (0..vm-1), -1 for all components |
OFCondition DRTIconImageSequence::Item::getPixelAspectRatio | ( | OFString & | value, |
const signed long | pos = 0 |
||
) | const |
get PixelAspectRatio (0028,0034)
value | reference to variable in which the value should be stored |
pos | index of the value to get (0..vm-1), -1 for all components |
OFCondition DRTIconImageSequence::Item::getPixelAspectRatio | ( | Sint32 & | value, |
const unsigned long | pos = 0 |
||
) | const |
get PixelAspectRatio (0028,0034)
value | reference to variable in which the value should be stored |
pos | index of the value to get (0..vm-1) |
|
inline |
get PixelData (7fe0,0010)
|
inline |
get PixelData (7fe0,0010)
OFCondition DRTIconImageSequence::Item::getPixelRepresentation | ( | Uint16 & | value, |
const unsigned long | pos = 0 |
||
) | const |
get PixelRepresentation (0028,0103)
value | reference to variable in which the value should be stored |
pos | index of the value to get (0..vm-1) |
OFCondition DRTIconImageSequence::Item::getPlanarConfiguration | ( | Uint16 & | value, |
const unsigned long | pos = 0 |
||
) | const |
get PlanarConfiguration (0028,0006)
value | reference to variable in which the value should be stored |
pos | index of the value to get (0..vm-1) |
OFCondition DRTIconImageSequence::Item::getRedPaletteColorLookupTableData | ( | Uint16 *& | value, |
unsigned long * | count = NULL |
||
) | const |
get RedPaletteColorLookupTableData (0028,1201)
value | reference to variable in which the value should be stored |
count | stores number of items in the result array (if not NULL) |
OFCondition DRTIconImageSequence::Item::getRedPaletteColorLookupTableDescriptor | ( | Uint16 & | value, |
const unsigned long | pos = 0 |
||
) | const |
get RedPaletteColorLookupTableDescriptor (0028,1101)
value | reference to variable in which the value should be stored |
pos | index of the value to get (0..vm-1) |
OFCondition DRTIconImageSequence::Item::getRows | ( | Uint16 & | value, |
const unsigned long | pos = 0 |
||
) | const |
get Rows (0028,0010)
value | reference to variable in which the value should be stored |
pos | index of the value to get (0..vm-1) |
OFCondition DRTIconImageSequence::Item::getSamplesPerPixel | ( | Uint16 & | value, |
const unsigned long | pos = 0 |
||
) | const |
get SamplesPerPixel (0028,0002)
value | reference to variable in which the value should be stored |
pos | index of the value to get (0..vm-1) |
OFCondition DRTIconImageSequence::Item::getSmallestImagePixelValue | ( | Uint16 & | value, |
const unsigned long | pos = 0 |
||
) | const |
get SmallestImagePixelValue (0028,0106)
value | reference to variable in which the value should be stored |
pos | index of the value to get (0..vm-1) |
OFBool DRTIconImageSequence::Item::isEmpty | ( | ) |
check if item is empty
OFBool DRTIconImageSequence::Item::isValid | ( | ) | const |
check if item is valid, i.e. not the empty default item
assigment operator
copy | item object to be copied |
OFCondition DRTIconImageSequence::Item::read | ( | DcmItem & | item | ) |
read elements from sequence item
item | reference to DICOM sequence item from which the elements should be read |
OFCondition DRTIconImageSequence::Item::setBitsAllocated | ( | const Uint16 | value, |
const unsigned long | pos = 0 |
||
) |
set BitsAllocated (0028,0100)
value | value to be set (should be valid for this VR) |
pos | index of the value to be set (0..vm-1), vm=1 |
OFCondition DRTIconImageSequence::Item::setBitsStored | ( | const Uint16 | value, |
const unsigned long | pos = 0 |
||
) |
set BitsStored (0028,0101)
value | value to be set (should be valid for this VR) |
pos | index of the value to be set (0..vm-1), vm=1 |
OFCondition DRTIconImageSequence::Item::setBluePaletteColorLookupTableData | ( | const Uint16 * | value, |
const unsigned long | count | ||
) |
set BluePaletteColorLookupTableData (0028,1203)
value | array value to be set (data is copied) |
count | number of items in the array |
OFCondition DRTIconImageSequence::Item::setBluePaletteColorLookupTableDescriptor | ( | const Uint16 | value, |
const unsigned long | pos = 0 |
||
) |
set BluePaletteColorLookupTableDescriptor (0028,1103)
value | value to be set (should be valid for this VR) |
pos | index of the value to be set (0..vm-1), vm=3 |
OFCondition DRTIconImageSequence::Item::setColorSpace | ( | const OFString & | value, |
const OFBool | check = OFTrue |
||
) |
set ColorSpace (0028,2002)
value | value to be set (single value only) or "" for no value |
check | check 'value' for conformance with VR (CS) and VM (1) if enabled |
OFCondition DRTIconImageSequence::Item::setColumns | ( | const Uint16 | value, |
const unsigned long | pos = 0 |
||
) |
set Columns (0028,0011)
value | value to be set (should be valid for this VR) |
pos | index of the value to be set (0..vm-1), vm=1 |
OFCondition DRTIconImageSequence::Item::setGreenPaletteColorLookupTableData | ( | const Uint16 * | value, |
const unsigned long | count | ||
) |
set GreenPaletteColorLookupTableData (0028,1202)
value | array value to be set (data is copied) |
count | number of items in the array |
OFCondition DRTIconImageSequence::Item::setGreenPaletteColorLookupTableDescriptor | ( | const Uint16 | value, |
const unsigned long | pos = 0 |
||
) |
set GreenPaletteColorLookupTableDescriptor (0028,1102)
value | value to be set (should be valid for this VR) |
pos | index of the value to be set (0..vm-1), vm=3 |
OFCondition DRTIconImageSequence::Item::setHighBit | ( | const Uint16 | value, |
const unsigned long | pos = 0 |
||
) |
set HighBit (0028,0102)
value | value to be set (should be valid for this VR) |
pos | index of the value to be set (0..vm-1), vm=1 |
OFCondition DRTIconImageSequence::Item::setICCProfile | ( | const Uint8 * | value, |
const unsigned long | count | ||
) |
set ICCProfile (0028,2000)
value | array value to be set (data is copied) |
count | number of items in the array |
OFCondition DRTIconImageSequence::Item::setLargestImagePixelValue | ( | const Uint16 | value, |
const unsigned long | pos = 0 |
||
) |
set LargestImagePixelValue (0028,0107)
value | value to be set (should be valid for this VR) |
pos | index of the value to be set (0..vm-1), vm=1 |
OFCondition DRTIconImageSequence::Item::setPhotometricInterpretation | ( | const OFString & | value, |
const OFBool | check = OFTrue |
||
) |
set PhotometricInterpretation (0028,0004)
value | value to be set (single value only) or "" for no value |
check | check 'value' for conformance with VR (CS) and VM (1) if enabled |
OFCondition DRTIconImageSequence::Item::setPixelAspectRatio | ( | const OFString & | value, |
const OFBool | check = OFTrue |
||
) |
set PixelAspectRatio (0028,0034)
value | value to be set (possibly multi-valued) or "" for no value |
check | check 'value' for conformance with VR (IS) and VM (2) if enabled |
OFCondition DRTIconImageSequence::Item::setPixelRepresentation | ( | const Uint16 | value, |
const unsigned long | pos = 0 |
||
) |
set PixelRepresentation (0028,0103)
value | value to be set (should be valid for this VR) |
pos | index of the value to be set (0..vm-1), vm=1 |
OFCondition DRTIconImageSequence::Item::setPlanarConfiguration | ( | const Uint16 | value, |
const unsigned long | pos = 0 |
||
) |
set PlanarConfiguration (0028,0006)
value | value to be set (should be valid for this VR) |
pos | index of the value to be set (0..vm-1), vm=1 |
OFCondition DRTIconImageSequence::Item::setRedPaletteColorLookupTableData | ( | const Uint16 * | value, |
const unsigned long | count | ||
) |
set RedPaletteColorLookupTableData (0028,1201)
value | array value to be set (data is copied) |
count | number of items in the array |
OFCondition DRTIconImageSequence::Item::setRedPaletteColorLookupTableDescriptor | ( | const Uint16 | value, |
const unsigned long | pos = 0 |
||
) |
set RedPaletteColorLookupTableDescriptor (0028,1101)
value | value to be set (should be valid for this VR) |
pos | index of the value to be set (0..vm-1), vm=3 |
OFCondition DRTIconImageSequence::Item::setRows | ( | const Uint16 | value, |
const unsigned long | pos = 0 |
||
) |
set Rows (0028,0010)
value | value to be set (should be valid for this VR) |
pos | index of the value to be set (0..vm-1), vm=1 |
OFCondition DRTIconImageSequence::Item::setSamplesPerPixel | ( | const Uint16 | value, |
const unsigned long | pos = 0 |
||
) |
set SamplesPerPixel (0028,0002)
value | value to be set (should be valid for this VR) |
pos | index of the value to be set (0..vm-1), vm=1 |
OFCondition DRTIconImageSequence::Item::setSmallestImagePixelValue | ( | const Uint16 | value, |
const unsigned long | pos = 0 |
||
) |
set SmallestImagePixelValue (0028,0106)
value | value to be set (should be valid for this VR) |
pos | index of the value to be set (0..vm-1), vm=1 |
OFCondition DRTIconImageSequence::Item::write | ( | DcmItem & | item | ) |
write elements to sequence item
item | reference to DICOM sequence item to which the elements should be written |