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DICOM PS3.16 2020a - Content Mapping Resource​ Page 441​

Table TID 10013. CT Irradiation Event Data​

 

NL​

Rel with​

VT​

Concept Name​

VM​ Req​ Condition​

Value Set Constraint​

 

 

Parent​

 

 

 

Type​

 

1​

 

 

CONTAINER​EV (113819, DCM, "CT​

1​

M​

 

 

 

 

 

Acquisition")​

 

 

 

2​

>​

CONTAINS​

TEXT​

EV (125203, DCM,​

1​

U​

 

 

 

 

 

"Acquisition Protocol")​

 

 

 

3​

>​

CONTAINS​

CODE​

EV (123014, DCM,​

1​

M​

DCID 4030 “CT, MR​

 

 

 

 

"Target Region")​

 

 

and PET Anatomy​

 

 

 

 

 

 

 

Imaged”​

4​

>​

CONTAINS​

CODE​

EV (113820, DCM, "CT​

1​

M​

DCID 10013 “CT​

 

 

 

 

Acquisition Type")​

 

 

Acquisition Type”​

4b​

>>​

HAS​

CODE​

EV (113961, DCM,​

1-n​

U​

DCID 10033 “CT​

 

 

PROPERTIES​

"Reconstruction​

 

 

Reconstruction​

 

 

 

 

Algorithm")​

 

 

Algorithm”​

5​

>​

CONTAINS​

CODE​

EV (408730004, SCT,​

1​

U​

DCID 10014 “Contrast​

 

 

 

 

"Procedure Context")​

 

 

Imaging Technique”​

6​

>​

CONTAINS​

UIDREF​

EV (113769, DCM,​

1​

M​

 

 

 

 

 

"Irradiation Event UID")​

 

 

 

6b​

>​

CONTAINS​

TEXT​

EV (113605, DCM,​

1​

U​

 

 

 

 

 

"Irradiation Event Label")​

 

 

6c​

>>​

HAS​

CODE​

EV(113606,DCM,"Label​ 1​

MC​IF the value of Row​DCID 10022 “Label​

 

 

CONCEPT​

 

Type")​

 

6b is the value of an​Types”​

 

 

MOD​

 

 

 

Attribute in the​

 

 

 

 

 

 

 

images.​

 

6d​

>​

CONTAINS​

CODE​

EV (128551, DCM, "Is​

1​

U​

DCID 230 “Yes-No”​

 

 

 

 

Repeated Acquisition")​

 

 

 

6e​

>>​

HAS​

CODE​

EV (128552, DCM,​

1​

M​

DCID 10034 “Reason​

 

 

CONCEPT​

 

"Reason for Repeating​

 

 

for Repeating​

 

 

MOD​

 

Acquisition")​

 

 

Acquisition”​

6f​

>​

CONTAINS​

DATETIME​ EV (111526, DCM,​

1​

U​

 

 

 

 

 

"DateTime Started")​

 

 

 

7​

>​

CONTAINS​

CONTAINER​EV (113822, DCM, "CT​

1​

M​

 

 

 

 

 

Acquisition Parameters")​

 

 

 

8​

>>​

CONTAINS​

NUM​

EV (113824, DCM,​

1​

M​

UNITS = EV (s, UCUM,​

 

 

 

 

"Exposure Time")​

 

 

"s")​

9​

>>​

CONTAINS​

INCLUDE​

DTID 10014 “Scanning​

1​

M​

 

 

 

 

 

Length”​

 

 

 

10​

>>​

CONTAINS​

NUM​

EV (113826, DCM,​

1​

M​

UNITS = EV (mm,​

 

 

 

 

"Nominal Single​

 

 

UCUM, "mm")​

 

 

 

 

Collimation Width")​

 

 

 

11​

>>​

CONTAINS​

NUM​

EV (113827, DCM,​

1​

M​

UNITS = EV (mm,​

 

 

 

 

"Nominal Total​

 

 

UCUM, "mm")​

 

 

 

 

Collimation Width")​

 

 

 

12​

>>​

CONTAINS​

NUM​

EV (113828, DCM, "Pitch​ 1​

MC​IF row 4 equals​

UNITS = EV ({ratio},​

 

 

 

 

Factor")​

 

(116152004, SCT,​ UCUM, "ratio")​

 

 

 

 

 

 

"Spiral Acquisition")​

 

 

 

 

 

 

or equals (113804,​

 

DCM, "Sequenced​

Acquisition")​

- Standard -​

Page 442​

DICOM PS3.16 2020a - Content Mapping Resource​

NL​ Rel with​

VT​

Concept Name​ VM​ Req​ Condition​ Value Set Constraint​

Parent​

 

Type​

13​

>>​

CONTAINS​

NUM​

EV (113823, DCM,​

1​

M​

 

 

 

 

"Number of X-Ray​

 

 

 

 

 

 

Sources")​

 

 

14​

>>​

CONTAINS​

CONTAINER​EV (113831, DCM, "CT​ 1-n​

M​

 

 

 

 

X-Ray Source​

 

 

 

 

 

 

Parameters")​

 

 

15​

>>>​ CONTAINS​

TEXT​

EV (113832, DCM,​

1​

M​

 

 

 

 

"Identification of the​

 

 

 

 

 

 

X-Ray Source")​

 

 

16​

>>>​ CONTAINS​

NUM​

EV (113733, DCM,​

1​

M​

 

 

 

 

"KVP")​

 

 

17​

>>>​ CONTAINS​

NUM​

EV (113833, DCM,​

1​

M​

 

 

 

 

"Maximum X-Ray Tube​

 

 

 

 

 

 

Current")​

 

 

UNITS = EV ({X-Ray​ sources}, UCUM,​ "X-Ray sources")​

UNITS = EV (kV,​

UCUM, "kV")​

UNITS = EV (mA,​

UCUM, "mA")​

18​

>>>​

CONTAINS​

NUM​

EV (113734, DCM,​

1​

M​

UNITS = EV (mA,​

 

 

 

 

"X-Ray Tube Current")​

 

 

UCUM, "mA")​

19​

>>>​

CONTAINS​

NUM​

EV (113834, DCM,​

1​

MC​IF row 4 does not​

UNITS = EV (s, UCUM,​

 

 

 

 

"Exposure Time per​

 

equal(113805,DCM,​"s")​

 

 

 

 

Rotation")​

 

"Constant Angle​

 

 

 

 

 

 

 

Acquisition")​

 

20​

>>>​

CONTAINS​

NUM​

EV (113821, DCM,​

1​

U​

UNITS = EV (mm,​

 

 

 

 

"X-Ray Filter Aluminum​

 

 

UCUM, "mm")​

 

 

 

 

Equivalent")​

 

 

 

21​

>​

CONTAINS​

CONTAINER​EV (113829, DCM, "CT​

1​

MC​IF row 4 does not​

 

 

 

 

 

Dose")​

 

equal(113805,DCM,​

 

 

 

 

 

 

"Constant Angle​

 

 

 

 

 

 

 

Acquisition")​

 

22​

>>​

CONTAINS​

NUM​

EV(113830,DCM,"Mean​ 1​

M​

UNITS = EV (mGy,​

 

 

 

 

CTDIvol")​

 

 

UCUM, "mGy")​

23​

>>​

CONTAINS​

CODE​

EV (113835, DCM,​

1​

M​

DCID 4052 “Phantom​

 

 

 

 

"CTDIw Phantom Type")​

 

 

Devices”​

24​

>>​

CONTAINS​

NUM​

EV (113836, DCM,​

1​

U​

UNITS = EV​

 

 

 

 

"CTDIfreeair Calculation​

 

 

(mGy/mA.s, UCUM,​

 

 

 

 

Factor")​

 

 

"mGy/mA.s")​

25​

>>​

CONTAINS​

NUM​

EV(113837,DCM,"Mean​ 1​

U​

UNITS = EV (mGy,​

 

 

 

 

CTDIfreeair")​

 

 

UCUM, "mGy")​

26​

>>​

CONTAINS​

NUM​

EV (113838, DCM,​

1​

M​

UNITS = EV (mGy.cm,​

 

 

 

 

"DLP")​

 

 

UCUM, "mGy.cm")​

27​

>>​

CONTAINS​

NUM​

EV (113839, DCM,​

1​

U​

UNITS = EV (mSv,​

 

 

 

 

"Effective Dose")​

 

 

UCUM, "mSv")​

28​

>>>​

HAS​

CODE​

EV (370129005, SCT,​

1​

MC​IF row 27 is present​DCID 10011 “Effective​

 

 

CONCEPT​

 

"Measurement Method")​

 

 

Dose Evaluation​

 

 

MOD​

 

 

 

 

Method”​

- Standard -​

 

 

 

DICOM PS3.16 2020a - Content Mapping Resource​

Page 443​

 

NL​

Rel with​

VT​

Concept Name​

VM​ Req​

Condition​

Value Set Constraint​

 

 

Parent​

 

 

 

Type​

 

 

29​

>>>>​HAS​

NUM​

EV (113840, DCM,​

1​ MC​IF row 28 is present​UNITS = EV​

 

 

PROPERTIES​

"Effective Dose​

 

and equals (113800,​(mSv/mGy.cm, UCUM,​

 

 

 

 

Conversion Factor")​

 

DCM, "DLP to E​

"mSv/mGy.cm")​

 

 

 

 

 

 

conversion via MC​

 

 

 

 

 

 

 

computation") or​

 

 

 

 

 

 

 

equals (113802,​

 

 

 

 

 

 

 

DCM, "DLP to E​

 

 

 

 

 

 

 

conversion via​

 

 

 

 

 

 

 

measurement")​

 

30​

>>​

CONTAINS​

NUM​

EV (113930, DCM, "Size​1-n​

U​

 

UNITS = EV (mGy,​

 

 

 

 

Specific Dose​

 

 

 

UCUM, "mGy")​

 

 

 

 

Estimation")​

 

 

 

 

31​

>>>​ HAS​

CODE​

EV (370129005, SCT,​

1​

M​

 

DCID 10023 “Size​

 

 

CONCEPT​

 

"Measurement Method")​

 

 

 

Specific Dose​

 

 

MOD​

 

 

 

 

 

Estimation Method for​

 

 

 

 

 

 

 

 

CT”​

32​

>>>>​INFERRED​

NUM​

EV (113931, DCM,​

1​ MC​IF row 31 equals​

UNITS = EV (mm,​

 

 

FROM​

 

"Measured Lateral​

 

(113934, DCM,​

UCUM, "mm")​

 

 

 

 

Dimension")​

 

"AAPM 204 Lateral​

 

 

 

 

 

 

 

Dimension") or​

 

 

 

 

 

 

 

(113936, DCM,​

 

 

 

 

 

 

 

"AAPM 204 Sum of​

 

 

 

 

 

 

 

Lateral and AP​

 

 

 

 

 

 

 

Dimension")​

 

33​

>>>>​INFERRED​

NUM​

EV (113932, DCM,​

1​ MC​IF row 31 equals​

UNITS = EV (mm,​

 

 

FROM​

 

"Measured AP​

 

(113935, DCM,​

UCUM, "mm")​

 

 

 

 

Dimension")​

 

"AAPM 204 AP​

 

 

 

 

 

 

 

Dimension") or​

 

 

 

 

 

 

 

(113936, DCM,​

 

 

 

 

 

 

 

"AAPM 204 Sum of​

 

 

 

 

 

 

 

Lateral and AP​

 

 

 

 

 

 

 

Dimension")​

 

34​

>>>>​INFERRED​

NUM​

EV (113933, DCM,​

1​ MC​IF row 31 equals​

UNITS = EV (mm,​

 

 

FROM​

 

"Derived Effective​

 

(113934, DCM,​

UCUM, "mm")​

 

 

 

 

Diameter")​

 

"AAPM 204 Lateral​

 

 

 

 

 

 

 

Dimension") or​

 

 

 

 

 

 

 

(113935, DCM,​

 

 

 

 

 

 

 

"AAPM 204 AP​

 

 

 

 

 

 

 

Dimension") or​

 

 

 

 

 

 

 

(113936, DCM,​

 

 

 

 

 

 

 

"AAPM 204 Sum of​

 

 

 

 

 

 

 

Lateral and AP​

 

 

 

 

 

 

 

Dimension") or​

 

 

 

 

 

 

 

(113937, DCM,​

 

 

 

 

 

 

 

"AAPM204Effective​

 

 

 

 

 

 

Diameter Estimated​

 

 

 

 

 

 

From Patient Age")​

 

34b​ >>>>​INFERRED​

NUM​

EV (113980, DCM,​

1​ MC​IF row 31 equals​

UNITS = EV (mm,​

 

 

FROM​

 

"Water Equivalent​

 

(113981, DCM,​

UCUM, "mm")​

 

 

 

 

Diameter")​

 

"Water Equivalent​

 

 

 

 

 

 

 

Diameter​

 

 

 

 

 

 

 

Representative​

 

 

 

 

 

 

 

Value")​

 

- Standard -​

Page 444​

 

DICOM PS3.16 2020a - Content Mapping Resource​

 

 

NL​

Rel with​

VT​

Concept Name​

VM​ Req​

Condition​

Value Set Constraint​

 

 

Parent​

 

 

 

Type​

 

 

34c​ >>>>>​HAS​

CODE​

EVEV(370129005,SCT,​ 1​

M​

 

DCID 10024 “Water​

 

 

CONCEPT​

 

"Measurement Method")​

 

 

 

Equivalent Diameter​

 

 

MOD​

 

 

 

 

 

Method”​

34d​ >>>>​INFERRED​

UIDREF​

EV (113985, DCM,​

1-n​ MC​IF row 31 equals​

 

 

 

FROM​

 

"Series or Instance used​

 

(113982, DCM,​

 

 

 

 

 

for Water Equivalent​

 

"Water Equivalent​

 

 

 

 

 

Diameter estimation")​

 

Diameter Integrated​

 

 

 

 

 

 

AcrossScanRange")​

 

 

 

 

 

 

or (113984, DCM,​

 

 

 

 

 

 

 

"Water Equivalent​

 

 

 

 

 

 

 

Diameter From​

 

 

 

 

 

 

 

Localizer")or(row31​

 

 

 

 

 

 

equals (113983,​

 

 

 

 

 

 

 

DCM, "Water​

 

 

 

 

 

 

 

Equivalent Diameter​

 

 

 

 

 

 

From Raw Data")​

 

 

 

 

 

 

 

and the Raw Data is​

 

 

 

 

 

 

encoded in DICOM).​

34e​ >>>>​INFERRED​

NUM​

EV (113986, DCM, "Z​

1​

MC​IF row 31 equals​

UNITS = EV (mm,​

 

 

FROM​

 

value of location of Water​

(113981, DCM,​

UCUM, "mm")​

 

 

 

 

Equivalent Diameter​

 

"Water Equivalent​

 

 

 

 

 

estimation")​

 

Diameter​

 

 

 

 

 

 

 

Representative​

 

 

 

 

 

 

 

Value")​

 

35​

>>​

CONTAINS​

INCLUDE​

DTID 10015 “CT Dose​

1​

M​

 

 

 

 

 

 

Check Details”​

 

 

 

 

36​

>​

CONTAINS​

TEXT​

EV (113842, DCM,​

1​

U​

 

 

 

 

 

 

"X-RayModulationType")​

 

 

 

37​

>​

CONTAINS​

TEXT​

EV (121106, DCM,​

1​

U​

 

 

 

 

 

 

"Comment")​

 

 

 

 

38​

>​

CONTAINS​

INCLUDE​

DTID 1020 “Person​

1-n​

U​

 

$PersonProcedureRole​

 

 

 

 

Participant”​

 

 

 

= EV (113851, DCM,​

 

 

 

 

 

 

 

 

"Irradiation​

 

 

 

 

 

 

 

 

Administering")​

39​

>​

CONTAINS​

INCLUDE​

DTID 1021 “Device​

1​

MC​Required if the​

$DeviceProcedureRole​

 

 

 

 

Participant”​

 

irradiating device is​= EV (113859, DCM,​

 

 

 

 

 

 

not the recording​

"Irradiating Device")​

 

 

 

 

 

 

device.​

 

Content Item Descriptions​

 

 

 

 

 

 

Row 2​

User-defined type of clinical acquisition protocol for creating images or image-derived measurements. May be​

 

 

taken from Protocol Name (0018,1030) or from Performed Procedure Step Description (0040,0254).​

Row 3​

The target region is the anatomy exposed.​

 

 

 

 

Row 4​

Description of the method used during acquisition of this CT irradiation event, may be derived from Acquisition​

 

 

Type (0018,9302).​

 

 

 

 

 

Row 4b​

Though not a characteristic of the acquisition per se, the type of reconstruction intended has a bearing on the​

 

 

technique used. If multiple types of reconstruction are performed, multiple values can be listed. These values​

 

 

should correspond to the values of Reconstruction Algorithm (0018,9315) in the reconstructed images.​

Row 5​

The acquisition was performed with or without contrast medium application.​

 

- Standard -​

 

DICOM PS3.16 2020a - Content Mapping Resource​

Page 445​

Row 6d, 6e​

If an acquisition is a repeat because an earlier acquisition was unsatisfactory, this may be recorded along with​

 

a coded reason. This is intended to help with subsequent analysis by providing a priori information about why​

 

the study might be flagged as an outlier with higher dose exposure values than usual for the type of study.​

Row 6f​

The DateTime that the application of X-Rays started for this irradiation event. This shall correspond to the start​

 

of the first irradiation in the Irradiation Event, which defines the starting point for the calculation of the contents​

 

of the Row 21 "CT Dose" CONTAINER.​

 

Row 8​

Total time the patient has received X-Ray exposure during the irradiation event.​

 

Row 10​

Thevalueofthenominalwidth(referencedtothelocationoftheisocenteralongthezaxis)ofasinglecollimated​

 

slice in mm.​

 

Row 11​

The value of the nominal width (referenced to the location of the isocenter along the z axis) of the nominal total​

 

collimation in mm over the area of active X-Ray detection (z-coverage).​

 

Row 12​

Pitch Factor: For Spiral Acquisition, the Pitch Factor is the ratio of the Table Feed per Rotation to the Nominal​

 

Total Collimation Width. For Sequenced Acquisition, the Pitch Factor is the ratio of the Table Feed per single​

 

sequenced scan to the Nominal Total Collimation Width.​

 

Row 14​

CT X-Ray source parameters related to the acquisition. For each X-Ray source an item must be present. For​

 

multi-energy acquisitions, multiple items may be present for each X-Ray source, each item describing one​

 

energy level.​

 

Row 15​

Identification of the X-Ray source. Identifies the particular X-Ray source (in a multi-source CT system) for​

 

which the set of X-Ray source parameter values is reported.​

 

Row 16​

KVP value as measured/recorded by system.​

 

Row 18​

Mean tube current as measured/recorded by system.​

 

Row 19​

Exposure time as measured/recorded by the system per rotation.​

 

Row 20​

Thickness of an equivalent filter constructed from aluminum, in case of multi-source CT systems AND if Row​

 

4 is not present​

 

Row 21​

CT Dose for one acquisition​

 

Row 22​

"Mean CTDIvol" refers to the average value of the CTDIvol applied within this acquisition.​

 

 

CTDIvol is the volume CTDIw, where CTDIw is the weighted computed tomography dose index 100 as defined​

 

in IEC 60601-2-44.​

 

 

For Sequenced and Spiral scanning, CTDIvol = CTDIw / Pitch Factor.​

 

 

ForStationaryandFreescanning,CTDIvol =CTDIw CumulativeExposureTime/ExposureTimePerRotation.​

 

According to IEC 60601-2-44 Ed 3 for Constant Angle Acquisition may be calculated as CTDIvol = (CTDIw /​

 

Current Time Product (mAs)) X-Ray Tube Current (mA) x (Nominal Total Collimation Width (mm) / Table​

 

Speed (mm/s)).​

 

 

Note​

 

 

TheratioCTDIw/CurrentTimeProductisevaluatedindependentlyoftheConstantAngleAcquisition​

 

but with the same settings of tube voltage and Total Collimation Width as those of the Constant Angle​

 

Acquisition.​

 

 

See also CTDIvol (0018,9345) and Spiral Pitch Factor (0018,9311) in the “Enhanced Computed Tomography​

 

Image IOD” in PS3.3.​

 

Row 23​

The type of phantom used for CTDI measurement according to IEC 60601-2-44(e.g., Head 16 cm diameter​

 

PMMA, Body 32 cm diameter PMMA).​

 

Row 24​

The CTDIfree air Calculation Factor is the CTDIfree air per mAs, expressed in units of mGy/mAs. The CTDIfree air​

 

Calculation Factor may be used in one method calculating Dose. For example, for this acquisition, Effective​

Dose = Mean X-Ray Tube Current Cumulative Exposure Time CTDIfree air Calculation Factor (Effective​ Dose/ CTDIfree air).​

- Standard -​

Источник: https://studfile.net/preview/14585769/

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