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DICOM PS3.3 2020a - Information Object Definitions​

Page 531​

When the Red, Green, or Blue Palette Color Lookup Table Descriptor (0028,1101-1103) are used as part of the Palette Color Lookup​ Table Module in a Color Palette IOD, the 3rd value of Palette Color Lookup Table Descriptor (0028,1101-1103) (i.e, the number of​ bits for each entry in the Lookup Table Data) shall be 8.​

Note​

1.​A value of 16 indicates the Lookup Table Data will range from (0,0,0) minimum intensity to (65535,65535,65535) max-​ imum intensity.​

2.​Since the Palette Color Lookup Table Descriptor (0028,1101-1104) Attributes are multi-valued, in an Explicit VR​ Transfer Syntax, only one value representation (US or SS) may be specified, even though the first and third values are​ always by definition interpreted as unsigned. The explicit VR actually used is dictated by the VR needed to represent​ the second value, which will be consistent with Pixel Representation (0028,0103).​

C.7.6.3.1.6 Palette Color Lookup Table Data​

Palette Color Lookup Table Data (0028,1201-1204) contain the lookup table data corresponding to the Lookup Table Descriptor​ (0028,1101-1104).​

Palette color values must always be scaled across the full range of available intensities. This is indicated by the fact that there are​ no bits stored and high bit values for palette color data.​

Note​

For example, if there are 16 bits per entry specified and only 8 bits of value are truly used then the 8 bit intensities from 0 to​ 255 must be scaled to the corresponding 16 bit intensities from 0 to 65535. To do this for 8 bit values, simply replicate the​ value in both the most and least significant bytes.​

These lookup tables shall be used only when there is a single sample per pixel (single image plane) in the image.​

C.7.6.3.1.7 Pixel Aspect Ratio​

The pixel aspect ratio is the ratio of the vertical size and horizontal size of the pixels in the image specified by a pair of integer values​ where the first value is the vertical pixel size, and the second value is the horizontal pixel size. To illustrate, consider the example​ pixel size shown in Figure C.7.6.3.1.7-1​

Horizontal size = 0.25mm

Vertical size = 0.30mm

Figure C.7.6.3.1.7-1. Example of Pixel Size and Aspect Ratio​

Pixel Aspect Ratio = Vertical Size \ Horizontal Size = 0.30 mm \0.25 mm. Thus the Pixel Aspect Ratio could be represented as the​ multi-valued integer string "6\5", "60\50", or any equivalent integer ratio.​

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Page 532​

DICOM PS3.3 2020a - Information Object Definitions​

C.7.6.3.1.8 Extended Offset Table​

The Extended Offset Table (7FE0,0001) Value shall contain byte offsets to the first byte of the Item Tag of the first fragment for every​ frame in the Pixel Data Sequence.​

The byte offsets are measured from the first byte of the first Item Tag following the empty (zero length) Basic Offset Table item, i.e.,​ the Item Tag of the first fragment of the first frame.​

C.7.6.4 Contrast/Bolus Module​

Table C.7-12 specifies the Attributes that describe the contrast /bolus used in the acquisition of the Image.​

Table C.7-12. Contrast/Bolus Module Attributes​

Attribute Name​

Tag​

Type​

Attribute Description​

Contrast/Bolus Agent​

(0018,0010)​

2​

Contrast or bolus agent​

Contrast/Bolus Agent Sequence​

(0018,0012)​

3​

Sequence that identifies the contrast agent.​

 

 

 

One or more Items are permitted in this Sequence.​

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

 

BCID 12 “Radiographic Contrast Agent”.​

Contrast/Bolus Route​

(0018,1040)​

3​

Administration route of contrast agent​

Contrast/Bolus Administration​

(0018,0014)​

3​

Sequence that identifies the route of administration of​

Route Sequence​

 

 

contrast agent.​

 

 

 

Only a single Item is permitted in this Sequence.​

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

 

BCID 11 “Route of Administration”.​

>Additional Drug Sequence​

(0018,002A)​

3​

Sequence that identifies any additional drug that is​

 

 

 

administered with the contrast agent bolus.​

 

 

 

One or more Items are permitted in this Sequence.​

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

 

No Baseline CID is defined.​

Contrast/Bolus Volume​

(0018,1041)​

3​

Volume injected in milliliters of diluted contrast agent​

Contrast/Bolus Start Time​

(0018,1042)​

3​

Time of start of injection​

Contrast/Bolus Stop Time​

(0018,1043)​

3​

Time of end of contrast injection​

Contrast/Bolus Total Dose​

(0018,1044)​

3​

Total amount in milliliters of the undiluted contrast​

 

 

 

agent​

Contrast Flow Rate​

(0018,1046)​

3​

Rate(s) of injection(s) in milliliters/sec​

Contrast Flow Duration​

(0018,1047)​

3​

Duration(s) of injection(s) in seconds. Each Contrast​

 

 

 

Flow Duration value shall correspond to a value of​

 

 

 

Contrast Flow Rate (0018,1046).​

Contrast/Bolus Ingredient​

(0018,1048)​

3​

Active ingredient of agent.​

 

 

 

Defined Terms:​

 

 

 

IODINE​

 

 

 

GADOLINIUM​

 

 

 

CARBONDIOXIDE​

 

 

 

BARIUM​

Contrast/Bolus Ingredient​

(0018,1049)​

3​

Milligrams of active ingredient per milliliter of (diluted)​

Concentration​

 

 

agent​

Note​

1.​Flow duration is an alternate method of specifying stop time​

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DICOM PS3.3 2020a - Information Object Definitions​

Page 533​

2.​Flow rate allows for stepped injections by being capable of multiple values (1,N) instances.​ 3.​For a 100 ml injection of 76% Diatrizoate and meglumine/sodium, diluted 1:1,​

•​the Contrast/Bolus Agent would be "76% Diatrizoate" as text​ •​the Contrast/Bolus Volume would be 100 ml,​

•​the Contrast/Bolus Total Dose would be 50 ml,​ •​the Contrast/Bolus Ingredient would be "IODINE",​

•​the Contrast/Bolus Ingredient Concentration would be 370mg/ml.​

C.7.6.4b Enhanced Contrast/Bolus Module​

Table C.7-12b specifies the Attributes that describe the contrast/bolus used in the acquisition of the Image.​

Table C.7-12b. Enhanced Contrast/Bolus Module Attributes​

Attribute Name​

Tag​

Type​

Attribute Description​

Contrast/Bolus Agent Sequence​

(0018,0012)​

1​

Sequence that identifies one or more contrast agents​

 

 

 

administered prior to or during the acquisition.​

 

 

 

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

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

 

BCID 12 “Radiographic Contrast Agent”.​

>Contrast/Bolus Agent Number​

(0018,9337)​

1​

Identifying number, unique within this SOP Instance, of​

 

 

 

the agent administered. Used to reference this particular​

 

 

 

agent from the Contrast/Bolus Functional Group Macro.​

 

 

 

The number shall be 1 for the first Item and increase by 1​

 

 

 

for each subsequent Item.​

>Contrast/Bolus Administration​

(0018,0014)​

1​

Sequence that identifies the route of administration of​

Route Sequence​

 

 

contrast agent.​

 

 

 

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

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

 

BCID 11 “Route of Administration”.​

>Contrast/Bolus Ingredient Code​

(0018,9338)​

2​

Active ingredient of agent.​

Sequence​

 

 

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

 

 

 

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

 

BCID 13 “Radiographic Contrast Agent Ingredient”.​

>Contrast/Bolus Volume​

(0018,1041)​

2​

Total volume administered in milliliters of diluted contrast​

 

 

 

agent.​

>Contrast/Bolus Ingredient​

(0018,1049)​

2​

Milligrams of active ingredient per milliliter of agent.​

Concentration​

 

 

 

>Contrast/BolusIngredientPercent​

(0052,0001)​

3​

Percentage by volume of active ingredient in the total​

by Volume​

 

 

volume.​

>Contrast/BolusIngredientOpaque​

(0018,9425)​

3​

Absorption of the ingredient greater than the absorption​

 

 

 

of water (tissue).​

Enumerated Values:​

YES​

NO​

See Section C.7.6.4b.1.​

- Standard -​

Page 534​

DICOM PS3.3 2020a - Information Object Definitions​

Attribute Name​

Tag​

Type​

Attribute Description​

>Contrast/Bolus T1 Relaxivity​

(0018,0013)​

3​

T1 Relaxivity of the MR Contrast/Bolus used specified in​

 

 

 

s-1*mmol-1 specified at body temperature in human blood​

 

 

 

plasma.​

>Contrast Administration Profile​

(0018,9340)​

3​

Sequence that describes one or more phases of contrast​

Sequence​

 

 

administered.​

 

 

 

One or more Items are permitted in this Sequence.​

>>Contrast/Bolus Volume​

(0018,1041)​

2​

Volume administered during this phase in milliliters of​

 

 

 

diluted contrast agent.​

>>Contrast/Bolus Start Time​

(0018,1042)​

3​

Time of start of administration.​

>>Contrast/Bolus Stop Time​

(0018,1043)​

3​

Time of end of administration.​

>>Contrast Flow Rate​

(0018,1046)​

3​

Rateofadministrationinmilliliters/sec.Onlyasinglevalue​

 

 

 

shall be present.​

>>Contrast Flow Duration​

(0018,1047)​

3​

Duration of injection in seconds. Only a single value shall​

 

 

 

be present.​

C.7.6.4b.1 Enhanced Contrast/Bolus Module Attributes​

C.7.6.4b.1.1 Contrast/Bolus Ingredient Opaque for X-Ray Equipment​

Contrast/BolusIngredientOpaque(0018,9425)AttributespecifiesthetypeofrelativeX-Rayabsorptionofthecontrast/bolusingredient,​ compared to the X-Ray absorption of water.​

Enumerated Values:​

YES​The contrast/bolus ingredient absorbs more X-Ray photons than water​

NO​ The contrast/bolus ingredient absorbs less X-Ray photons than water​

Note​

The Contrast/Bolus Ingredient Opaque (0018,9425) Attribute determines the sign of the gradient of X-Ray beam intensity​ from inside to outside the injected vessel, thus allowing optimal settings of the image processing applications (e.g., vessel​ edge detection, etc.), see Figure C.7.6.4b-1.​

The relative gray level of the injected vessel with respect to the gray level of the water of Pixel Data (7FE0,0010) is determined by​ the Contrast/Bolus Ingredient Opaque (0018,9425) and by the Pixel Intensity Relationship Sign (0028,1041). For example, if the​ contrast/bolus ingredient is more radio graphically dense than water (i.e., YES), and the Pixel Intensity Relationship Sign (0028,1041)​ is -1, then the contrast/bolus ingredient is represented by higher values of Pixel Data than water.​

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DICOM PS3.3 2020a - Information Object Definitions​

Page 535​

X-Ray Beam

Intensity

X-Ray

Detection Plane

Injected Vessel

Injected

 

Injected

Vessel

 

Vessel

 

 

 

Water

 

Water

X-Ray Source

 

 

 

 

 

 

 

Contrast/Bolus

 

Contrast/Bolus

 

Ingredient Opaque

 

Ingredient Opaque

 

(0018,9425)

(0018,9425)

 

equals YES

 

equals NO

Figure C.7.6.4b-1. X-Ray beam intensity vs. Contrast/Bolus Ingredient Opaque​

C.7.6.5 Cine Module​

Table C.7-13 specifies the Attributes of a Multi-frame Cine Image.​

Table C.7-13. Cine Module Attributes​

Attribute Name​

Tag​

Type​

Attribute Description​

Preferred Playback​

(0018,1244)​

3​

Describesthepreferredplaybacksequencingforamulti-frameimage.​

Sequencing​

 

 

Enumerated Values:​

 

 

 

 

 

 

0​Looping (1,2…n,1,2,…n,1,2,….n,…)​

 

 

 

1​Sweeping (1,2,…n,n-1,…2,1,2,…n,…)​

Frame Time​

(0018,1063)​

1C​

Nominaltime(inmsec)perindividualframe.SeeSectionC.7.6.5.1.1​

 

 

 

for further explanation. Required if Frame Increment Pointer​

 

 

 

(0028,0009) points to Frame Time.​

Frame Time Vector​

(0018,1065)​

1C​

An array that contains the real time increments (in msec) between​

 

 

 

frames for a Multi-frame image. See Section C.7.6.5.1.2 for further​

 

 

 

explanation.RequiredifFrameIncrementPointer(0028,0009)points​

 

 

 

to Frame Time Vector.​

 

 

 

Note​

 

 

 

Frame Time Vector arrays may not be properly encoded if​

 

 

 

Explicit VR Transfer Syntax is used and the VL of this​

 

 

 

Attribute exceeds 65534 bytes.​

Start Trim​

(0008,2142)​

3​

The frame number of the first frame of the Multi-frame image to be​

 

 

 

displayed.​

Stop Trim​

(0008,2143)​

3​

The Frame Number of the last frame of a Multi-frame image to be​

 

 

 

displayed.​

Recommended Display​

(0008,2144)​

3​

Recommended rate at which the frames of a Multi-frame image​

Frame Rate​

 

 

should be displayed in frames/second.​

Cine Rate​

(0018,0040)​

3​

Number of frames per second.​

Frame Delay​

(0018,1066)​

3​

Time (in msec) from Content Time (0008,0033) to the start of the​

 

 

 

first frame in a Multi-frame image.​

- Standard -​

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