DICOM PS3.17 2021e - Explanatory Information

GGGG.2 Dual-source CT Organ Radiation Dose Example

The following example shows the report of the organ dose calculated for a dual-source CT scan.

The calculation uses a Radiation Dose SR provided by a CT system that has dual X-Ray tubes. The Radiation Dose SR is created during the acquisition of Neck DE_CAROTID CT scan of an adult male of 75 kg and 165 cm height.

The dose calculations are performed on the CT system. The dose calculation application generates a Patient Radiation Dose Structured Report document and a Dose Point Cloud containing an image of the dose distribution for the patient model.

The dose calculation application uses the following settings and assumptions:

Table GGGG.2-1. Dual-source CT Organ Radiation Dose Example

Node

Code Meaning of Concept Name

Code or Example Value

Comment

1

Patient Radiation Dose Report

TID 10030

1.1

Language of Content Item and Descendants

(En, IETF4646, "English")

TID 1204

1.1.1

Country of Language

(CA, ISO3166_1, "Canada")

TID 1204

1.2

Observer Type

(121007, DCM, "Device")

TID 1002

1.3

Device Observer UID

2.13.4.5.2.33.5

TID 1004

1.4

Device Observer Name

RUMC-213

TID 1004

1.5

Device Observer Manufacturer

Manufacturer DEX

TID 1004

1.6

Device Observer Model Name

Scanner 4500

TID 1004

1.7

Radiation Dose Estimate

TID 10031

1.7.1

Radiation Dose Estimate Name

Dual-source Neck DE_CAROTID CT scan Tube A&B

TID 10031

1.7.2

Comment

Tube A and B combined

TID 10031

1.7.3

Radiation Dose Estimation Methodology

TID 10033

1.7.3.1

SR Instance Used

TID 10033

1.10.3.1

SR Instance Used

Radiation Dose SR

1.10.3.1.1

SOP Class UID

1.2.840.1008.5.1.4.1.1.88.67

1.10.3.1.2

SOP Instance UID

1.2.3.4.566.77.1

1.7.3.1.1

Event UID Used

1.3.12.2.xxxxxx

TID 10033

1.7.3.2

Patient Radiation Dose Model

TID 10033

1.7.3.2.1

Patient Model Type

(128404, DCM, "Anthropomorphic Model")

TID 10033

1.7.3.2.2

Radiation Transport Model Type

(128421, DCM, "Geometric Radiation Transport Model")

TID 10033

1.7.3.2.3

Patient Radiation Dose Model Data

< UID of "Patient Radiation Dose Model Data">

TID 10033

1.7.3.2.3

Patient Radiation Dose Model Data

Parametric map

1.7.3.2.3.1

SOP Class UID

1.2.840.1008.5.1.4.1.1.30

1.7.3.2.3.2

SOP Instance UID

1.2.5.4.6.677

1.7.3.2.4

Patient Radiation Dose Model Reference

Cristy et al. 1987

TID 10033

1.7.3.2.5

Patient Model Demographics

TID 10033

1.7.3.2.5.1

Model Minimum Age

18 (a, UCUM, "year")

TID 10033

1.7.3.2.5.2

Model Maximum Age

18 (a, UCUM, "year")

TID 10033

1.7.3.2.5.3

Model Patient Sex

(M, DCM, "Male")

TID 10033

1.7.3.2.5.4

Model Minimum Weight

75 (kg, UCUM, "kilogram")

TID 10033

1.7.3.2.5.5

Model Maximum Weight

75 (kg, UCUM, "kilogram")

TID 10033

1.7.3.2.5.6

Model Minimum Height

165 (cm, UCUM, "Centimeter")

TID 10033

1.7.3.2.5.7

Model Maximum Height

165 (cm, UCUM, "Centimeter")

TID 10033

1.7.3.2.6

Patient Model Registration

TID 10033

1.7.3.2.6.1

Registration Method

(125024, DCM, "Image Content-based Alignment")

TID 10033

1.7.3.2.6.2

Spatial Registration

<UID of "Spatial Registration">

TID 10033

1.7.3.2.6.2.1

SOP Class UID

1.2.840. 1008.5.1.4.1.1.66.1

1.7.3.2.6.2.2

SOP Instance UID

1.4.9.87.11.223.5

1.7.3.3

X-Ray Beam Attenuator

TID 10033

1.7.3.3.1

Attenuator Category

(113771, DCM, "X-Ray Filters")

TID 10033

1.7.3.3.2

Equivalent Attenuator Material

(12503006, SCT, "Aluminum")

TID 10033

1.7.3.3.3

Equivalent Attenuator Thickness

1.4 (mm, UCUM, "Millimeter")

TID 10033

1.7.3.3.4

Attenuator Description

Mean equivalent Aluminum thickness of bowtie filter

TID 10033

1.7.3.3.5

X-Ray Beam Attenuator Model

TID 10033

1.7.3.3.5.1

Radiation Transport Model Type

(128421, DCM, "Geometric Radiation Transport Model")

TID 10033

1.7.3.4

Radiation Dose Estimate Method

TID 10033

1.7.3.4.1

Radiation Dose Estimate Method Type

(D009010, MSH, "Monte Carlo")

TID 10033

1.7.3.4.2

Radiation Dose Estimate Parameters

TID 10034

1.7.3.4.2.1

(111634, DCM, "Half Value Layer")

8.5 (mm, UCUM, "Millimeter")

TID 10034

1.7.3.4.3

Radiation Dose Estimate Method Reference

Simulation package XX version YY

TID 10033

1.7.4

Radiation Dose Estimate Representation

TID 10032

1.7.4.1

Distribution Representation

(128496, DCM, "Dose Point Cloud")

TID 10032

1.7.4.2

Radiation Dose Representation Data

TID 10032

1.7.3.2.3.1

SOP Class UID

1.2.840.1008.5.1.4.1.1.30

Parametric Map

1.7.3.2.3.2

SOP Instance UID

1.87.2.3.4.11.3

1.7.4.3

Organ

(38266002, SCT, "Entire Body")

TID 10032

1.7.5

Organ Radiation Dose Information

TID 10031

1.7.5.1

Organ

(39607008, SCT, "Lung")

TID 10031

1.7.5.1.1

(128533, DCM, "Mean Absorbed Radiation Dose")

9.6 (mGy, UCUM, "mGy")

TID 10031


DICOM PS3.17 2021e - Explanatory Information