CTDI Individual Job Aid (VB20)

SIEMENS Healthineers CTDI Individual Job Aid (VB20) Version 2024.12 Template Effective Date: 10 Aug 2021 | HILS 2223 Job Aid Effective Date: 27 Mar 2025 | QR700018830 Unrestricted I Published by Siemens Healthineers AG I © Siemens Healthineers, 2025 CTDI Individual Job Aid (VB20) SIEMENS Healthineers What is CTDI Individual? CTDI Individual is a new standardized measure of SIEMENS Healthineers 2 Son O ¡ .. Oinical Configuration SIEMENS Heolthineers VB20A102-XCeed / meduser Free (Restricted Remote Access) Siemens Service Service 11330002_999999 DOMATOMXceed radiation dose as the index for radiation output of CT Bye Diagnosis Installation Technical Configuration Quality Assurance Clinical Configuration "01/01/1996, O 12/06/2024 Quality Assurance CTDI Individual 9:15:12.83AM ROT 101 107 IMA 1 Quality Status Overview scanners and patient dose in syngo CT VB20. Scan and Reconstruction Parameter CTDI Calculation Parameter TP-175.3 IEC Constancy Load Parameter Set IEC Constancy Reference Select saved parameter set- Current Single Axial Scans Save Parameter Set Nume your parameter ... Save pe01 IEC Acceptance CIDIw (32 cm) (mGy] 0.712 Scan Mode O RoutineSpiralAdultExtremitiesHighresSn Extended QA Clinical Scare 5n 100 CTDI Individual Pach 0.85 Ell. mAS 81 • With CTDI Individual, you can measure the dose in a mA CTDIvol (32 cm) ImGyl 0.848 KV Sn100 Shaped Filter Standard Eff. MAs 69 Acquistion [mm] 6-4x0.6 (z-sharp) 11.0 GT00 single axial scan with customized scan parameters. Rotation Time [l SL 0.8/6410.6 ( sharp) 100.0 0/0 300 Collimation [mm] 32x0.6 Simulator Fiber Sn 40 FoV [mm] 100 • If you select a spiral scan mode with CTDI Individual, the system automatically converts the scan to a single axial scan. (09:09:40} Function CTDI Individual @ Quality Assurance & QualityAssurance started. 109:10:02): Basic Scan Mode "RoutineSpiralAdutExtremitiesHighresSn' loaded. CTDI Individual requires the CTDI head phantom with 109:10:23): The scan has been completed • 109:11:49) The scan has been completed. Go Cancel 16 cm diameter or the CTDI body phantom with 32 cm Position Control 9:15 AM diameter. 2 Effective Date: 27 Mar 2025 | QR700018830 Unrestricted I Published by Siemens Healthineers AG | © Siemens Healthineers AG, 2025 CTDI Individual Job Aid (VB20) SIEMENS Healthineers Benefits of CTDI Individual CTDI Individual: SIEMENS Healthineers 2 Son O ¡ .. Oinical Configuration SIEMENS Heolthineers VB20A102-XCeed / meduser Free (Restricted Remote Access) Siemens Service Service 11330002_999999 DOMATOMXceed Bye Diagnosis Installation Technical Configuration Quality Assurance Clinical Configuration "01/01/1996, O 12/06/2024 Quality Assurance CTDI Individual 9:15:12.83AM ROT 101 107 IMA 1 Quality Status Overview Scan and Reconstruction Parameter CTDI Calculation Parameter TP-175.3 • Includes every scan mode to measure CTDI values. IEC Constancy Load Parameter Set IEC Constancy Reference Select saved parameter set- Current Single Axial Scans Save Parameter Set Nume your parameter ... Save pe01 IEC Acceptance CIDIw (32 cm) (mGy] 0.712 Saves specific scan modes with altered parameter sets Scan Mode O • RoutineSpiralAdultExtremitiesHighresSn Extended QA Clinical Scare 5n 100 CTDI Individual Pach 0.85 Ell. mAS 81 for next use. mA CTDIvol (32 cm) ImGyl 0.848 KV Sn100 Shaped Filter Standard Eff. MAs 69 Acquistion [mm] 6-4x0.6 (z-sharp) 11.0 GT00 Rotation Time [l SL 0.8/6410.6 ( sharp) 100.0 0/0 300 • Converts every scan mode to a single axial scan. Collimation [mm] 32x0.6 Simulator Fiber Sn 40 FoV [mm] 100 • Gives more freedom to experienced users (physicists or trained personnel). • Exceeds IEC (International Electrotechnical (09:09:40} Function CTDI Individual @ Quality Assurance & QualityAssurance started. 109:10:02): Basic Scan Mode "RoutineSpiralAdutExtremitiesHighresSn' loaded. Commission) functions with preset scan modes 109:10:23): The scan has been completed 109:11:49) The scan has been completed. Go Cancel according to standards. Position Control 9:15 AM Medical physicists or other technically trained personnel with the necessary knowledge required should use the CTDI Individual feature to measure and calculate CTDI. You should have all necessary phantoms and measuring 3 devices at hand as well as documentation material. Effective Date: 27 Mar 2025 | QR700018830 Unrestricted I Published by Siemens Healthineers AG | © Siemens Healthineers AG, 2025 CTDI Individual Job Aid (VB20) SIEMENS Healthineers Preparing the measurement 1. Position the CTDI phantom on the head holder or on the patient table. 2. Make sure to position the phantom in the isocenter of the scan field and align it to Configuration Panel the z-axis of the scanner. Administration Portal Administration Portal [EN] 3. Insert the ionization chamber properly in the dosimeter. Clinical Configuration 4. Access the Quality Assurance workspace from the Administration Portal or Clinical Checkup Spectral Re-Calibration Configuration. Resume 5. Select CTDI Individual on the left navigation tree. Daily QA Calibration syngo Remote Assist SIEMENS Healthineers' 14 Clinical Configuration X Scan Recon SIEMENS Healthineers VB20A102-XCeed / meduser Free (Restricted Remote Access) Diagnosis Installation "" Technical Configuration Quality Assurance Clinical Configuration Quality Assurance CTDI Individual Quality Status Overview IEC Constancy IEC Constancy Reference IEC Acceptance Extended QA CTDI Individual 4 Effective Date: 27 Mar 2025 | QR700018830 Unrestricted I Published by Siemens Healthineers AG | © Siemens Healthineers AG, 2025 CTDI Individual Job Aid (VB20) SIEMENS Healthineers Performing the measurement – 1 of 2 Select a scan mode from the Scan Mode drop-down list. By CTDI Individual default, the software automatically fills in the values of the other Scan and Reconstruction Parameter scan parameters after you have selected the scan mode. Adjust Load Parameter Set Select saved parameter set ... Load the values of the scan parameters, if necessary. Save Parameter Set Name your parameter ... Save Scan Mode kV RoutineSpiralAdultExtremitiesHighresSn Eff. mAs RoutineSpiralAdultExtremitiesSn Routine SpiralAdultExtremitiesTwinbeam mà Or: Shaped Filter RoutineSpiralAdultExtremitiesTwinspiral RoutineSpiralAdultExtremitiesTwinspiralMetal Acquistion [mm] RoutineSpiralAdultHead Rotation Time [s] Routine SpiralAdultHeadHighres Collimation [mm] Select a previously saved parameter set from the Load Parameter CTDI Individual Set drop-down list. Then select Load to load the set of saved Scan and Reconstruction Parameter parameters. Load Parameter Set Select saved parameter set Load Save Parameter Set preset1.dat Save Scan Mode preset2.dat Test.dat kV TestInterFluoro.dat 5 Effective Date: 27 Mar 2025 | QR700018830 Unrestricted I Published by Siemens Healthineers AG | © Siemens Healthineers AG, 2025 CTDI Individual Job Aid (VB20) SIEMENS Healthineers Performing the measurement – 2 of 2 1. Insert the ionization chamber and PMMA (Polymethyl Methacrylate) - - - - sticks into the drillings of the CTDI phantom. [09:09:40]: Function 'CTDI Individual @ Quality A 2. Select the Go button to initiate the Ready for scan state. [09:10:02]: Basic Scan Mode 'RoutineSpiralAdultE Ready for scan [09:10:23]: The scan has been completed. 3. Press the START key on the Control Box to initiate the scan. [09:11:49]: The scan has been completed. Press START 4. Read the value on the dosimeter and write it down. 1 Go Cancel 5. If you intend to measure the CTDIw (Weighted Computed Tomography Dose Index)1 value, measure the dose in the five drillings of the CTDI phantom, respectively. CTDI Calculation Parameter • For each measured dose value (dose integral in mGy*cm), calculate the CTDI100 (Computed Tomography Dose Index over a 100 mm length)2 by Current Single Axial Scan: dividing the value by the value of the displayed nominal collimation (in CTDIw (16 cm) [mGy] 0.769 cm). Clinical Scan: • Calculate the CTDIw by adding one third of the center CTDI100 value to Pitch 0.85 Siemens Service Service 11330002_999999 SOMATOM X ceed "01/01/1996, O Syngo CT VB204 HFS two thirds of the average of the four peripheral CTDI100 values. CTDIvol (16 cm) [mGy] 0.800 12/06/2024 10:24:08.85 AM ROT 101 101 IMA 1 TP-175.3 6. Compare the measured and calculated CTDIw value with the system provided value. O 1cm KV Sn100 Eff mAs 37 F GT 0.0 SL 0.6/64x0.6 (z-sharp) 50.0 010 Simulator Filter Sn nE 88 1 The CTDIw is a measure used to represent the average dose within a single slice of the scan. 6 2 The CTDI100 is a measure of the radiation dose from a single CT slice, integrated over a 100 mm length of a standard dosimetry phantom. Effective Date: 27 Mar 2025 | QR700018830 Unrestricted I Published by Siemens Healthineers AG | © Siemens Healthineers AG, 2025 CTDI Individual Job Aid (VB20) SIEMENS Healthineers Calculate the values For more details on the calculation methods, please see Dose information 3 your System Owner Manual – Dosimetry and imaging 1.1 Phantoms and methods 4 1.2 CTDI for typical CT conditions of operation 6 performance report. 1.3 Dose factors related to CTDI100 7 1.4 Overview of CTDI100 and CTDIw 8 1.5 Conversion factor for CTDIV from 0 32 cm phantom to 0 16 cm phantom 11 1.6 CTDI free air 12 1.7 CTDIvol SPR for topograms 13 1.8 Accuracy of dose indications 13 1.9 Geometric efficiency in the z-direction 14 1.10 Dose profiles 15 1.11 Beam quality, and minimum filtration 17 1.12 Stray radiation 17 1.13 Dose levels causing deterministic radiation effects 19 1.14 Performance specification of Automatic Exposure Control (AEC) 21 1.15 Adaptive Dose Shield 27 1.16 Radiation shields for reducing patient dose in CT scanning 27 SOMATOM go.Top 1.17 Size Specific Dose Estimate (SSDE) 28 2 Image quality 35 2.1 Low contrast detectability System Owner Manual - Dosimetry and imaging 35 2.2 CT Value, homogeneity, and image noise 35 performance report 2.3 Spatial resolution (MTF) in XY plane 36 2.4 Sensitivity profiles (z-direction) 37 2.5 Reconstructable slice thicknesses 38 3 RTP performance 39 3.1 Typical RTP scan modes 39 3.2 HU value conversion in electron and mass density 39 Information about quality assurance 44 4.1 Test methods for the constancy tests 45 Index 47 7 Effective Date: 27 Mar 2025 | QR700018830 Unrestricted I Published by Siemens Healthineers AG | © Siemens Healthineers AG, 2025 CTDI Individual Job Aid (VB20) SIEMENS Healthineers Stored measurement images The system stores all performed CTDI Individual scan images in the Patient Browser with the patient name Siemens Service. Patient Browser Local Data siemens X Q More Filters View&GO Print +] of Open Open with DICOM Import Export Correct Delete Manage Recon QIR Raw Data Results (3 results, 10:31:19 AM) Series Patient Name Date of Birth Patient ID Modality Study Date and Time Study Des Series Number Series Description Modality # Instances in ... Series Archived Exported Series Date a ... Siemens Service 01/01/1996 Service 1133 CT 12/06/2024 9:40:0. CTDI Measure 101 Rot CT 12/06/2024 9 Siemens Service 01/01/1996 Service 1133 CT 12/06/2024 9:09:4 ... CTDI Measure. 102 Rot CT 17 12/06/2024 9 ... Siemens Service 01/01/1996 Service 1133 CT 12/05/2024 11:02: ... CTDI Measure. 103 Rot CT 17 12/06/2024 9 104 Rot CT 17 12/06/2024 9 105 Rot CT 17 12/06/2024 9 106 Rot CT 17 12/06/2024 9 107 Rot CT 17 12/06/2024 9 Instances 8 Effective Date: 27 Mar 2025 | QR700018830 Unrestricted I Published by Siemens Healthineers AG | © Siemens Healthineers AG, 2025 CTDI Individual Job Aid (VB20) SIEMENS Healthineers Practical hints • The adjusted scan parameter values 3 O Clinical Configuration X 14 Scan Recon are displayed in green if they are A102-XCeed / meduser Free (Restricted Remote Access) valid. Installation " Technical Configuration Quality Assurance Clinical Configuration • If the values are displayed in yellow, CTDI Individual they are invalid. Then you need to Scan and Reconstruction Parameter CTDI Calculation Parameter readjust them before you proceed to Load Parameter Set Select saved parameter set ... Load Current Single Axial Scan: the next step. Save Parameter Set Name your parameter ... Save CTDIw (32 cm) [mGy] 0.712 Scan Mode RoutineSpiralAdultExtremitiesHighresSn Clinical Scan: • The CTDIw value of the last scan kV Sn 100 Pitch 0.85 disappears if you adjust the values of Eff. mAs 81 MA the scan parameter. 69 CTDIvol (32 cm) [mGy] 0.848 Shaped Filter Standard • To save the current parameter set, Acquistion [mm] 64x0.6 (z-sharp) type a name in the Save Parameter Rotation Time [s] 1.0 Collimation [mm] 32x0.6 Set field. Then select Save. FoV [mm] 100 9 Effective Date: 27 Mar 2025 | QR700018830 Unrestricted I Published by Siemens Healthineers AG | © Siemens Healthineers AG, 2025 SIEMENS Healthineers Please note this learning material is for training purposes only. For the proper use of the software or hardware, please always use the Operator Manual or Instructions for Use (hereinafter collectively “Operator Manual”) issued by Siemens Healthineers. This material is to be used as training material only and shall by no means substitute the Operator Manual. Any material used in this training will not be updated on a regular basis and does not necessarily reflect the latest version of the software and hardware available at the time of the training. The Operator Manual shall be used as your main reference, in particular for relevant safety information like warnings and cautions. Please note: Some functions shown in this material are optional and might not be part of your system. Certain products, product related claims or functionalities (hereinafter collectively “Functionality”) may not (yet) be commercially available in your country. Due to regulatory requirements, the future availability of said Functionalities in any specific country is not guaranteed. Please contact your local Siemens Healthineers sales representative for the most current information. The reproduction, transmission or distribution of this training or its contents is not permitted without express written authority. Offenders will be liable for damages. All names and data of patients, parameters and configuration dependent designations are fictional and examples only. All rights, including rights created by patent grant or registration of a utility model or design, are reserved. Siemens Healthineers HQ I Siemens Healthineers AG Siemensstr. 3 91301 Forchheim Germany Phone: +49 9191 18-0 siemens-healthineers.com 10 Effective Date: 27 Mar 2025 | QR700018830 Unrestricted I Published by Siemens Healthineers AG | © Siemens Healthineers AG, 2025