: Public Class
Created: 6/3/2016 1:51:45 PM
Modified: 8/26/2017 2:17:56 AM
Project:
Advanced:
DEFINITION:<br/>A set of scanning parameter values necessary to perform a single CT scan in the acquisition protocol. [adapted from NEMA XR 25-2010, https://www.nema.org/Standards/Pages/Computed-Tomography-Dose-Check.aspx]<br/><br/>EXAMPLE(S):<br/>A chest Protocol might include three elements:  two localizer CT radiographs (AP and Lateral) and a single helical scan, each of which would be described in separate steps with different parameter values.<br/><br/>OTHER NAME(S):<br/><br/>NOTE(S):<br/>Given that this sub-subclass of  ImagingProcessProtocolElement actually names the process as Acquisition and includes that word in the name of the class, the word Process is omitted from the class name.<br/>
Attribute
Public IVL<PQ>
  singleCollimationWidth
Details:
Map:DICOM=CT Acquisition Details Macro - CT Acquisition Details Sequence > Single Collimation Width (0018,9306)
Map:DICOM=Performed CT Acquisition Module - Acquisition Protocol Element Sequence (0018,9920) > Single Collimation Width (0018,9306)
Notes: DEFINITION:<br/>The width of a single row of acquired data.<br/><br/>EXAMPLE(S):<br/><br/>OTHER NAME(S):<br/><br/>NOTE(S):<br/>The units are of linear distince, e.g. mm.<br/>
Public IVL<PQ>
  totalCollimationWidth
Details:
Map:DICOM=CT Acquisition Details Macro - CT Acquisition Details Sequence > Total Collimation Width (0018,9307)
Map:DICOM=Performed CT Acquisition Module - Acquisition Protocol Element Sequence (0018,9920) > Total Collimation Width (0018,9307)
Notes: DEFINITION:<br/>The width of the total collimation over the area of active x-ray detection.<br/><br/>EXAMPLE(S):<br/><br/>OTHER NAME(S):<br/><br/>NOTE(S):<br/>The units are of linear distince, e.g. mm.<br/>
Public IVL<PQ>
  gantryDetectorTilt
Details:
Map:DICOM=CT Acquisition Details Macro - CT Acquisition Details Sequence > Gantry/Detector Tilt (0018,1120)
Map:DICOM=Performed CT Acquisition Module - Acquisition Protocol Element Sequence (0018,9920) > Gantry/Detector Tilt (0018,1120)
Notes: DEFINITION:<br/>Nominal angle of tilt in degrees of the scanning gantry. <br/><br/>EXAMPLE(S):<br/><br/>OTHER NAME(S):<br/><br/>NOTE(S):<br/>The units are of plane angle , e.g. degrees.  Zero degrees means the gantry is not tilted, negative degrees are when the top of the gantry is tilted away from where the table enters the gantry.<br/>
Public IVL<PQ>
  tableSpeed
Details:
Map:DICOM=Performed CT Acquisition Module - Acquisition Protocol Element Sequence (0018,9920) > Table Speed (0018,9309)
Map:DICOM=CT Table Dynamics Macro - CT Table Dynamics Sequence > Table Speed (0018,9309)
Notes: DEFINITION:<br/>The distance that the table moves per unit of time during the gathering of data.<br/><br/>EXAMPLE(S):<br/><br/>OTHER NAME(S):<br/><br/>NOTE(S):<br/>The units are of linear distance divided by time.<br/>
Public IVL<PQ>
  spiralPitchFactor
Details:
Map:DICOM=CT Table Dynamics Macro - CT Table Dynamics Sequence > Spiral Pitch Factor (0018,9311)
Map:DICOM=Performed CT Acquisition Module - Acquisition Protocol Element Sequence (0018,9920) > Spiral Pitch Factor (0018,9311)
Notes: DEFINITION:<br/>Ratio of the distance that the table moves during a complete revolution of the source around the gantry orbit, to the width of the total collimation over the area of active x-ray detection. <br/><br/>EXAMPLE(S):<br/><br/>OTHER NAME(S):<br/><br/>NOTE(S):<br/>The units are of unity.<br/>
Public IVL<PQ>
  ctdiVol
Details:
Map:DICOM=CT Acquisition Details Macro - CT Exposure Sequence > CTDIvol (0018,9345)
Map:DICOM=CT Exposure Macro - CT Exposure Sequence > CTDIvol (0018,9345)
Map:DICOM=Performed CT Acquisition Module - Acquisition Protocol Element Sequence (0018,9920) > CTDIvol (0018,9345)
Notes: DEFINITION:<br/>The average dose over the total volume scanned for the selected CT conditions of operation (calculated according to IEC 60601-2-44, Ed.2.1 (Clause 29.1.103.4)). <br/><br/>EXAMPLE(S):<br/><br/>OTHER NAME(S):<br/>Computed Tomography Dose Index (CTDI) Volume<br/><br/>NOTE(S):<br/>The units are energy dose, e.g. mGy.<br/>
Public CD
  ctdiPhantomTypeCode
Details:
Map:DICOM=CT Exposure Macro - CT Exposure Sequence > CTDI Phantom Type Code Sequence (0018,9346)
Map:DICOM=Performed CT Acquisition Module - Acquisition Protocol Element Sequence (0018,9920) > CTDI Phantom Type Code Sequence (0018,9346)
Notes: DEFINITION:<br/>The type of phantom to use for CTDI measurement according to IEC 60601-2-44.<br/><br/>EXAMPLE(S):<br/>(113690, DCM, "IEC Head Dosimetry Phantom")<br/>(113691, DCM, "IEC Body Dosimetry Phantom")<br/><br/>OTHER NAME(S):<br/>Computed Tomography Dose Index (CTDI) Phantom Type Code<br/><br/>NOTE(S):<br/>
Public IVL<PQ>
  kVp
Details:
Map:DICOM=CT XRay Details Sequence Macro - CT X-Ray Details Sequence > KVP (0018,0060)
Map:DICOM=Performed CT Acquisition Module - Acquisition Protocol Element Sequence (0018,9920) > CT X-Ray Details Sequence (0018,9325) > KVP (0018,0060)
Notes: DEFINITION:<br/>Peak kilovoltage output of the x-ray generator.<br/><br/>EXAMPLE(S):<br/>140 kv<br/><br/>OTHER NAME(S):<br/>KVP (0018,0060)<br/><br/>NOTE(S):<br/>The units are of electrical potential.<br/>
Public DSET<CD>
  exposureModulationTypeCode
Details:
Map:DICOM=CT Exposure Macro - CT Exposure Sequence > Exposure Modulation Type (0018,9323)
Map:DICOM=Performed CT Acquisition Module - Acquisition Protocol Element Sequence (0018,9920) > CT X-Ray Details Sequence (0018,9325) > Exposure Modulation Type (0018,9323)
Notes: DEFINITION:<br/>The manner in which tube current is varied in order to limit the dose.<br/><br/>EXAMPLE(S):<br/>NONE<br/>ANGULAR = current is modulated over different tube angles<br/>LONGITUDINAL = current is modulated along the axis of the table<br/>ECG_BASED = current is modulated based on the cardiac phase<br/>ORGAN_BASED = current is modulated based on the organs in the field of view<br/><br/>OTHER NAME(S):<br/>Exposure Modulation Type (0018,9323)<br/><br/>NOTE(S):<br/>
Tag Value
Map:DICOM Performed CT Acquisition Module - Acquisition Protocol Element Sequence (0018,9920)
Details:
 
Map:DICOM CT Acquisition Details Macro - CT Acquisition Details Sequence (0018,9304)
Details:
 
Object Type Connection Direction Notes
ImagingAcquisitionProtocolElement Class Generalization To DESCRIPTION: Each CTImagingAcquisitionProtocolElement always specializes one ImagingAcquisitionProtocolElement. Each ImagingAcquisitionProtocolElement might be specialized by one CTImagingAcquisitionProtocolElement. DEFINITION: EXAMPLE(S): OTHER NAME(S): NOTE(S):