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DICOM PS3.3 2020a - Information Object Definitions​

Page 1281​

Attribute Name​

Tag​

Type​

Attribute Description​

 

>Graphic Layer​

(0070,0066)​

3​

A default single gray unsigned value in which it is recommended that the​

Recommended Display​

 

 

layer be rendered on a monochrome display. The units are specified in​

Grayscale Value​

 

 

P-Values from a minimum of 0000H (black) up to a maximum of FFFFH​

 

 

 

(white).​

 

 

 

 

Note​

 

 

 

 

The maximum P-Value for this Attribute may be different from the​

 

 

 

maximum P-Value from the output of the Presentation LUT, which​

 

 

 

may be less than 16 bits in depth.​

 

>Graphic Layer​

(0070,0401)​

3​

A default color triplet value in which it is recommended that the layer be​

Recommended Display​

 

 

rendered on a color display. The units are specified in PCS-Values, and the​

CIELab Value​

 

 

value is encoded as CIELab. See Section C.10.7.1.1.​

 

>Graphic Layer Description​

(0070,0068)​

3​

A free text description of the contents of this layer.​

 

Note​

Graphic Layer Recommended Display RGB Value (0070,0067) was previously used in this Module, but has been retired​ and its function replaced by Graphic Layer Recommended Display CIELab Value (0070,0401). See PS3.3-2004.​

C.10.7.1 Graphic Layer Module Attributes​

C.10.7.1.1 Encoding of CIELab Values​

Attributes such as Graphic Layer Recommended Display CIELab Value (0070,0401) consist of three unsigned short values:​

•​An L value linearly scaled to 16 bits, such that 0x0000 corresponds to an L of 0.0, and 0xFFFF corresponds to an L of 100.0.​

•​An a* then a b* value, each linearly scaled to 16 bits and offset to an unsigned range, such that 0x0000 corresponds to an a* or b*​ of -128.0, 0x8080 corresponds to an a* or b* of 0.0 and 0xFFFF corresponds to an a* or b* of 127.0​

Note​

This is the same form of encoding as used for the PCS in ICC Profiles.​

C.10.8 Waveform Identification Module​

The table in this section contains Attributes that identify a Waveform as a separate information entity.​

Table C.10-8. Waveform Identification Module Attributes​

Attribute Name​

Tag​

Type​

Attribute Description​

Instance Number​

(0020,0013)​

1​

A number that identifies this Waveform.​

Content Date​

(0008,0023)​

1​

The date the Waveform data was created.​

Content Time​

(0008,0033)​

1​

The time the Waveform data was created.​

Acquisition DateTime​

(0008,002A)​

1​

The date and time that the acquisition of data that resulted​

 

 

 

in this waveform started; the reference timestamp for the​

 

 

 

Multiplex Group Time Offset (0018,1068) for a waveform​

 

 

 

multiplex group​

Note​

The synchronization of this time with an external​ clock is specified in the Synchronization Module in​ Acquisition Time Synchronized (0018,1800).​

- Standard -​

Page 1282​

DICOM PS3.3 2020a - Information Object Definitions​

Attribute Name​

Tag​

Type​

Attribute Description​

Referenced Instance​

(0008,114A)​

3​

Composite SOP Instances that are significantly related to​

Sequence​

 

 

this Waveform.​

 

 

 

One or more Items are permitted in this Sequence.​

>Include Table 10-11 “SOP Instance Reference Macro Attributes”​

 

>Purpose of Reference Code​

(0040,A170)​

3​

Code describing the purpose of the reference to the​

Sequence​

 

 

Instance(s).​

 

 

 

Only a single Item is permitted in this Sequence.​

>>Include Table 8.8-1 “Code Sequence Macro Attributes”​

 

DCID 7004 “Waveform Purposes of Reference” for​

 

 

 

referenced waveforms.​

Note​

Acquisition DateTime (0008,002A) is the time of the original waveform data capture. Derived waveforms that are processed​ (e.g.,averagedorfiltered)andencodedsubsequenttothewaveformAcquisitionDateTimehaveaContentDate(0008,0023)​ and Content Time (0008,0033) representing the time of the processing. In all cases the actual date and time of creation of​ the SOP Instance for transmission or storage may be recorded in the Instance Creation Date (0008,0012) and Instance​ Creation Time (0008,0013) (see Section C.12.1).​

C.10.9 Waveform Module​

The table in this section contains Attributes that describe a time-based waveform. A waveform consists of one or more multiplex​ groups, each encoded into an Item in the Waveform Sequence. All channels within a multiplex group are synchronously digitized at​ a common sampling frequency.​

Table C.10-9. Waveform Module Attributes​

Attribute Name​

Tag​

Type​

Attribute Description​

Waveform Sequence​

(5400,0100)​

1​

Sequence of Items, each representing one waveform multiplex​

 

 

 

group.​

 

 

 

One or more Items shall be included in this Sequence.​

 

 

 

Ordering of Items in this Sequence is significant for external​

 

 

 

reference to specific multiplex groups.​

>Multiplex Group Time Offset​

(0018,1068)​

1C​

Offset time in milliseconds from a reference time (see​

 

 

 

Section C.10.9.1.1).​

 

 

 

Required if Acquisition Time Synchronized (0018,1800) value is Y;​

 

 

 

may be present otherwise.​

>Trigger Time Offset​

(0018,1069)​

1C​

Offset time in milliseconds from a synchronization trigger to the first​

 

 

 

sample of a waveform multiplex group. May be positive or negative.​

 

 

 

Required if waveform acquisition is synchronized to a trigger.​

>Trigger Sample Position​

(0018,106E)​

3​

Samplenumberwhosetimecorrespondstoasynchronizationtrigger​

 

 

 

(see Section C.10.9.1.2).​

>Waveform Originality​

(003A,0004)​

1​

See Section C.10.9.1.3.​

 

 

 

Enumerated Values:​

 

 

 

ORIGINAL​

 

 

 

DERIVED​

>Number of Waveform​

(003A,0005)​

1​

Number of channels for this multiplex group.​

Channels​

 

 

 

- Standard -​

 

DICOM PS3.3 2020a - Information Object Definitions​

Page 1283​

Attribute Name​

Tag​

Type​

Attribute Description​

 

>Number of Waveform​

(003A,0010)​

1​

Number of samples per channel in this multiplex group.​

Samples​

 

 

 

 

>Sampling Frequency​

(003A,001A)​

1​

Frequency in Hz​

 

>Multiplex Group Label​

(003A,0020)​

3​

Label for multiplex group​

 

>ChannelDefinitionSequence​

(003A,0200)​

1​

Sequence of Items, with one Item per channel (see​

 

 

 

 

Section C.10.9.1.4).​

 

 

 

 

One or more Items shall be included in this Sequence.​

 

 

 

Ordering of Items in this Sequence is significant for reference to​

 

 

 

specific channels.​

 

>>WaveformChannelNumber​

(003A,0202)​

3​

Equipment physical channel number used for acquisition.​

>>Channel Label​

(003A,0203)​

3​

Text label for channel, which may be used for display purposes​

>>Channel Status​

(003A,0205)​

3​

One or more values for the status of this channel within this SOP​

 

 

 

Instance.​

 

 

 

 

Defined Terms:​

 

 

 

 

OK​

 

 

 

 

TEST DATA​

 

 

 

 

DISCONNECTED​

 

 

 

 

QUESTIONABLE​

 

 

 

 

INVALID​

 

 

 

 

UNCALIBRATED​

 

 

 

 

UNZEROED​

 

 

 

 

PreciselocationofachangeinstatusmaybenotedinanAnnotation.​

>>Channel Source Sequence​

(003A,0208)​

1​

A coded descriptor of the waveform channel source (metric,​

 

 

 

anatomical position, function, and technique).​

 

 

 

 

Only a single Item shall be included in this Sequence.​

 

 

 

 

(see Section C.10.9.1.4.1)​

 

>>>Include Table 8.8-1 “Code Sequence Macro Attributes”.​

Baseline CID determined by IOD specialization​

 

>>Channel Source Modifiers​

(003A,0209)​

1C​

Sequence of Items that further qualify the Waveform Source.​

Sequence​

 

 

One or more Items shall be included in this Sequence.​

 

 

 

 

 

 

Ordering of Items in this Sequence may be semantically significant.​

 

 

 

Required if Channel Source Sequence (003A,0208) does not fully​

 

 

 

specify the semantics of the source.​

 

>>>Include Table 8.8-1 “Code Sequence Macro Attributes”.​

Baseline CID determined by IOD specialization​

 

>>Source Waveform​

(003A,020A)​

3​

A Sequence that provides reference to a DICOM waveform from​

Sequence​

 

 

which this channel was derived.​

 

 

 

 

One or more Items are permitted in this Sequence.​

 

>>>Include Table 10-11 “SOP Instance Reference Macro​

 

 

Attributes”​

 

 

 

 

>>>Referenced Waveform​

(0040,A0B0)​

1​

Identifies the waveform multiplex group and channel within the​

Channels​

 

 

referenced SOP Instance. Pair of values (M,C).​

 

>>Channel Derivation​

(003A,020C)​

3​

Additional description of waveform channel derivation​

 

Description​

 

 

 

 

- Standard -​

Page 1284​

DICOM PS3.3 2020a - Information Object Definitions​

Attribute Name​

Tag​

Type​

Attribute Description​

>>Channel Sensitivity​

(003A,0210)​

1C​

Nominal numeric value of unit quantity of sample. Required if​

 

 

 

samples represent defined (not arbitrary) units.​

>>Channel Sensitivity Units​

(003A,0211)​

1C​

A coded descriptor of the Units of measure for the Channel​

Sequence​

 

 

Sensitivity.​

 

 

 

Only a single Item shall be included in this Sequence.​

 

 

 

(see Section C.10.9.1.4.2).​

 

 

 

Required if Channel Sensitivity (003A,0210) is present.​

>>>Include Table 8.8-1 “Code Sequence Macro Attributes”​

DCID 82 “Units of Measurement”.​

>>Channel Sensitivity​

(003A,0212)​

1C​

Multiplier to be applied to encoded sample values to match units​

Correction Factor​

 

 

specified in Channel Sensitivity (003A,0210) (e.g., based on​

 

 

 

calibration data) (see Section C.10.9.1.4.2).​

 

 

 

Required if Channel Sensitivity (003A,0210) is present.​

>>Channel Baseline​

(003A,0213)​

1C​

Offset of encoded sample value 0 from actual 0 using the units​

 

 

 

defined in the Channel Sensitivity Units Sequence (003A,0211).​

 

 

 

Required if Channel Sensitivity (003A,0210) is present.​

>>Channel Time Skew​

(003A,0214)​

1C​

Offsetoffirstsampleofchannelfromwaveformmultiplexgroupstart​

 

 

 

time, in seconds (see Section C.10.9.1.4.3)​

 

 

 

Required if Channel Sample Skew is not present.​

>>Channel Sample Skew​

(003A,0215)​

1C​

Offsetoffirstsampleofchannelfromwaveformmultiplexgroupstart​

 

 

 

time, in samples (see Section C.10.9.1.4.3)​

 

 

 

Required if Channel Time Skew is not present.​

>>Channel Offset​

(003A,0218)​

3​

Additional offset of first sample of channel to be used in aligning​

 

 

 

multiple channels for presentation or analysis, in seconds (see​

 

 

 

Section C.10.9.1.4.3)​

>>Waveform Bits Stored​

(003A,021A)​

1​

Number of significant bits within the waveform samples (see​

 

 

 

Section C.10.9.1.4.4)​

>>Filter Low Frequency​

(003A,0220)​

3​

Nominal 3dB point of lower frequency of pass band; in Hz​

>>Filter High Frequency​

(003A,0221)​

3​

Nominal 3dB point of upper frequency of pass band; in Hz​

>>Notch Filter Frequency​

(003A,0222)​

3​

Center frequency of notch filter(s); in Hz​

>>Notch Filter Bandwidth​

(003A,0223)​

3​

Nominal 3dB bandwidth of notch filter(s); in Hz​

>>Channel Minimum Value​

(5400,0110)​

3​

Minimumvalidsamplevalueaslimitedbytheacquisitionequipment​

 

 

 

(see Section C.10.9.1.4.5)​

>>Channel Maximum Value​

(5400,0112)​

3​

Maximumvalidsamplevalueaslimitedbytheacquisitionequipment​

 

 

 

(see Section C.10.9.1.4.5)​

>Waveform Bits Allocated​

(5400,1004)​

1​

Size of each waveform data sample within the Waveform Data; See​

 

 

 

Section C.10.9.1.5​

>Waveform Sample​

(5400,1006)​

1​

Data representation of the waveform data points. See​

Interpretation​

 

 

Section C.10.9.1.5.​

>Waveform Padding Value​

(5400,100A)​

1C​

Value of waveform samples inserted in channels when input is​

 

 

 

absentorinvalid.Requiredifacquisitionequipmentinsertspadding.​

 

 

 

See Section C.10.9.1.6.​

>Waveform Data​

(5400,1010)​

1​

Encodeddatasamples-channelmultiplexed.SeeSectionC.10.9.1.7​

WaveformDataDisplayScale​

(003A,0230)​

3​

Therecommendedtime-basedwaveformdatadisplayscaleinunits​

 

 

 

of mm/s (see Section C.10.9.1.8).​

- Standard -​

 

DICOM PS3.3 2020a - Information Object Definitions​

Page 1285​

Attribute Name​

Tag​

Type​

Attribute Description​

 

Waveform Display​

(003A,0231)​

3​ Acolortripletvaluerecommendedforrenderingthewaveformdisplay​

Background CIELab Value​

 

background on a color display. The units are specified in​

 

 

PCS-Values, and the value is encoded as CIELab. See​

 

 

Section C.10.7.1.1.​

 

WaveformPresentationGroup​

(003A,0240)​

3​ Sequence of Items, each Item describing a Presentation Group of​

Sequence​

 

one or more waveform channels to be displayed together.​

 

 

Note​

 

 

 

 

A Presentation Group is conventionally denoted a "display​

 

 

page", and a waveform object may be rendered using​

 

 

several Presentation Groups under user display control.​

 

 

One or more Items are permitted in this Sequence.​

 

>Presentation Group Number​

(003A,0241)​

1​ A number that identifies the Presentation Group.​

 

>Channel Display Sequence​

(003A,0242)​

1​ Sequence of Items, each Item describing a channel to be displayed​

 

 

in the Presentation Group.​

 

 

 

One or more Items shall be included in this Sequence.​

>>Referenced Waveform​

(0040,A0B0)​

1​ Identifierofthedisplayedchannel,specifiedasapairofvalues(M,C)​

Channels​

 

wherethefirstvalueistheordinaloftheItemofWaveformSequence​

 

 

(5400,0100) (i.e., the Multiplex Group Number), and the second​

 

 

value is the ordinal of the Item of the Channel Definition Sequence​

 

 

(003A,0200) Attribute (i.e., the Waveform Channel Number) within​

 

 

the multiplex group.​

 

 

 

Note​

 

 

 

 

InthecontextofaChannelDisplaySequence(003A,0242)​

 

 

Item, only a single channel shall be referenced.​

 

>>Channel Offset​

(003A,0218)​

3​ The offset in seconds from the beginning of the channel waveform​

 

 

data to the first sample to be used for presentation. Value may be​

 

 

negative.​

 

 

>>Channel Recommended​

(003A,0244)​

1​ A color triplet value recommended for rendering the channel on a​

Display CIELab Value​

 

color display. The units are specified in PCS-Values, and the value​

 

 

is encoded as CIELab. See Section C.10.7.1.1.​

 

>>Channel Position​

(003A,0245)​

1​ Position of the Channel within the Presentation Group display area​

 

 

(see Section C.10.9.1.9).​

 

>>Display Shading Flag​

(003A,0246)​

3​ Specifies display area shading between the displayed waveform​

 

 

channel and another line. The nature of the shading (e.g., solid, or​

 

 

cross-hatching) is implementation dependent.​

 

 

 

Enumerated Values:​

 

 

 

NONE​

no shading​

 

 

 

BASELINE​ shading between the waveform and the channel​

displaybaseline(samplevalue0equivalentlocation)​ ABSOLUTE​ shading between the waveform and the channel​

real world actual value 0 (i.e., taking into account​ the Channel Baseline (003A,0213) value)​

DIFFERENCE​shading between the waveform and a second​ waveform in the Presentation Group at the same​ ChannelPositionthatalsohasDisplayShadingFlag​ (003A,0246) value DIFFERENCE.​

- Standard -​

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