WG-28
Patient Radiation Dose SR (P-RDSR)
Goals
Store the results of Patient Organ Dose calculations
•
Of a SINGLE procedure (a limited period in time)
• including one or more modalities and procedure steps/phases
•
Of one or more organs
•
By one or more calculation methods
•
With the goals of:
• Store final results in the patient records
• Exchanging intermediate results with peers
Modalities and Types of Procedure
•
Single modality, single procedure step (studies with only a single phase)
•
•
Multi-modality, single procedure step (multi-phase concept)
•
•
CT, XA, XRF, Mammo, CR, DX, NM, PET
SPECT and PET/CT – internal organ dose (Stochastic)
Single modality, multi-procedure step (multi-phase concept)
DICOM WG-28 19-June-2015
Patient Radiation Dose SR (P-RDSR)
Procedure Examples
•
•
•
Single modality, single procedure step (studies with only a single phase)
• CT
• internal organ dose (Stochastic)
• eye dose (Deterministic)
• XA/RF (one time point)
• skin dose map (Deterministic)
• internal organ dose (Stochastic)
• Mammography – glandular dose (Stochastic)
• Projection x-ray (CR/DX)
• entrance skin dose (Deterministic)
• internal organ dose (Stochastic)
• NM/PET – internal organ dose (Stochastic)
Multi-modality, single procedure step (multi-phase concept)
• SPECT and PET/CT – internal organ dose (Stochastic)
Single modality, multi-procedure step (multi-phase concept)
• CT – multi-phasic study
• internal organ dose (Stochastic)
• eye dose (Deterministic)
• XA/RF (multi time points being combined)
• skin dose map (Deterministic)
• XA localization/disgnostic plus intervention
• skin dose map (Deterministic)
• internal organ dose (Stochastic)
• Mammography/Projection X-ray – Tomosynthesis
DICOM WG-28 19-June-2015
Patient Radiation Dose SR (P-RDSR)
Data flow – simple case
Radiation
Dose SR 1
Organ 1
Calculation
Method 1
Patient
Dose SR 1
DICOM WG-28 19-June-2015
Patient Radiation Dose SR (P-RDSR)
One RDSR, multiple organs
Radiation
Dose SR 1
Organ 1
Calculation
Method 1
Patient
Dose SR 1
Organ 2
Organ 3
DICOM WG-28 19-June-2015
Patient Radiation Dose SR (P-RDSR)
Multiple RDSRs, multiple organs
Radiation
Dose SR 1
Organ 1
Radiation
Dose SR 2
Organ 2
Calculation
Method 1
Patient
Dose SR 1
Organ 3
DICOM WG-28 19-June-2015
Patient Radiation Dose SR (P-RDSR)
Multiple RDSRs, multiple organs, multiple methods
Radiation
Dose SR 1
Organ 1
Radiation
Dose SR 2
Organ 2
Calculation
Method 1
Patient
Dose SR 1
Calculation
Method 2
Organ 3
DICOM WG-28 19-June-2015
Patient Radiation Dose SR (P-RDSR)
Detailed data flow
Patient Surface
FOR
Modality Frame of Reference (FOR)
Radiation
Dose SR
Radiation Exposure Information
X-Ray
Equipment
Modality
Image
IOD
- X-Ray exposure techniques
- Table, Gantry Angle, Beam Geometry, collimation
- Dose measure: CTDI, DAP, ...
Patient Dose Surface 3D
map/view
Organ Dose
Calculation
System
Beam Modifiers
(Equipment Information)
Patient
Model
- Table dimension
- Absorption material, …
Patient Model FOR
Patient/Model
to Equipment
Registration
Patient Dose 2D view/map
(e.g. iso-dose map)
Read old
P-RDSR into new
calculation
Patient Registration Information
-
Actual scan range
Patient position on table
Fiducials?
Patient
Dose SR
Calculated Patient Dose
DICOM WG-28 19-June-2015
Patient Radiation Dose SR (P-RDSR): Templates
TID prdsrT01
Patient –
Radiation Dose
Modalities:
 CT
 XA/RF
 DX/MG
 NM
1
TID 1002
Observer Context
1
TID ptdsrT02
Procedure Dose
CONTAINS:
Group Category:
• Single phase or Multi-phases combined
• Partial or Total organ analysis
Group1-N
Description:
• Phase number (if multi-phase)
• Single organ (e.g. skin, fetus)
What organs are included
1-N
Dose
Estimate
Group
1-N
Organ
Dose
1-N
Radiation Output
From System
(reference to RDSR)
Ref.
RDSR
1
TID prdsrT04
Dose Estimate
1
Methodology
1
Ref.
Patient
Model
3D Model
1
1
TID prdsrT03
Dose Estimate
Representation
1
1
1-N
1-N
Representation
Model
Registration to the
output values
Ref.
Beam
Modifiers
Registration
1
Dose
Estimation
Method
Ref.
2D / 3D Images
DICOM WG-28 19-June-2015