ACR MR Clinical Pixel Area Size Voxel Volume - Numaris X
This Job Aid provides workflow steps on how to locate the Pixel Area, Size and Voxel Volume for ACR MR Clinical Images on Numaris X Software.
ACR Clinical Images Pixel Area, Size & Voxel Volume Numaris X Job Aid ACR Clinical Images – Find Pixel Area/Voxel/Volume for Numaris X This Job Aid is not meant to replace the ACR documentation. Please refer to the MR ACR website. www.acr.org regarding the latest documentation for MRI ACR Clinical Image Testing. 1. Pixel/Voxel Dimensions a. FoV Read – Field-of-View in Frequency Encoding Direction (FOVf) b. FoV Phase – Field-of-View in Phase Encoding Direction (FOVp) c. Slice Thickness (ST) d. Base Resolution – Number of Frequency Encoding Steps [Frequency/Read Matrix (Nf)] e. Phase Resolution – Number of Phase Encoding Steps [Phase Matrix (Np)] 4:38 min 4 Manual 2 2 3.0.3-0 3-4.0 mm + 1,00 Routine Contrast Resolution Geometry System Physio Inline Sequence Common Acceleration | Filter FoV Read 220 4 mm Trajectory Cartesian FoV Phase 100 0 ¢ % Slice Thickness 4.0 - mm Base Resolution 320 ¢ Phase Resolution 80 % Interpolation v 2. Inplane Pixel Resolution – Hover over Voxel Size (example: 0.7x0.7x4.0 mm) to see Reconstructed and Acquisition Voxel Sizes a. Reconstruction – Reconstruced Voxel Size (e.g., voxel size changes if Interpolation selected/deselected) b. Acquisition – Acquired Voxel Size (use to calculate ACR in-plane pixel sizes) c. First Number – Phase Pixel d. Second Number – Frequency Pixel e. Third number – Slice Thickness (mm) @ 0.7x0.7×4.0 mm 1.00 Inline Voxel Size Reconstruction: 0.69x0.69×4.00 mm Acquisition: 0.86x0.69x4.00 mm Unrestricted 0 Published by Siemens Healthcare GmbH © Siemens Healthcare GmbH, 2020 SIEMENS Master Template Effective Date: 3/5/2020 | HOOD05162003074494 Job Aid Effective Date: 10/07/2020 | HOOD05162003132188 Healthineers Job Aid | ACR MR Clinical Images – Pixel Area, Size & Voxel Volume - Numaris X Job Aid Effective Date: 10/07/2020 | HOOD05162003132188 $ 43 3. Phase Direction Pixel Size (FoVp/Np) Routine Contrast Resouillon Geometry a. Field-of-View in Phase Encoding Direction Common Acceleration Filter (FOVp) ÷ Number of Steps in Phase Encoding FoV Read 220 - mm (Np) FoV Phase 100 0 % i. Example: FOV Phase (220) ÷ Phase Slice Thickness 4.0 - mm Resolution (256) = .859375 Resolution 320 Phase Resolution 80 % 4. Read/Frequency Direction Pixel Size (FoVf/Nf) a. Field-of-View in Read/Frequency Encoding Routine Contrast Resolution Geometr Direction (FOVf) ÷ Number of Steps in Common Acceleration Filter Read/Frequency Encoding (Nf) FoV Read 220 4 mm: i. Example: FOV Read (220) ÷ Base FoV Phase 100.0 % Resolution (320) = 0.6875 Slice Thickness 4.0 - mm Basa Resolution 320+ Phase Reisolution 80 5. Pixel Area (2D Sequences) 0.7x0.7x4.0 mm 1.00 a. Pixel Area = Acquired Phase Pixel Size x Read/Frequency Pixel Size Inline Voxel Size Reconstruction: 0.69x0.69x4.00 mm i. e.g., [0.86x0.69 = 0.5934] Acquisition: 0.86x0.69x4.00 mm 6. Voxel Volume (3D Sequences) 0.7x0.7x4.0 mm ₱ 1.00 a. Voxel Volume = Acquired Phase Pixel Size x Frequency Pixel Size x Slice Inline Voxel Size Reconstruction: 0.69x0.69x4.00 mm Thickness Acquisition: 0.86x0.69x4.00 mm i. e.g., [0.86x0.69x4.00 = 2.3736] Routine Contrast Resolution Geometry 7. Slice Thickness (3D Sequences): Slice Thickness ÷ Acceleration Filter Slice Resolution FoV Read 240 + mm a. e.g., [0.9÷0.51= 1.76] FaV Phase 100.0 ¢ % Slice Thickness 0.9 - mm Base Rasolution 256 ¢ Phase Reschition 100 - 90 Slice Resolution 51 % SIEMENS Unrestricted 0 Published by Siemens Healthcare GmbH © Siemens Healthcare GmbH, 2020 Master Template Effective Date: 3/5/2020 | HOOD05162003074494 Healthineers Job Aid Effective Date: 10/07/2020 | HOOD05162003132188 Page 2 of 3 Job Aid | ACR MR Clinical Images – Pixel Area, Size & Voxel Volume - Numaris X Job Aid Effective Date: 10/07/2020 | HOOD05162003132188 Please note that the 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's Manual shall be used as your main reference, in particular for relevant safety information like warnings and cautions. 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. 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Copyright © Siemens Healthcare GmbH 2020 Siemens Healthineers Headquarters Siemens Healthcare GmbH Henkestr. 127 91052 Erlangen, Germany Phone: +49 9131 84-0 siemens-healthineers.com SIEMENS Unrestricted 0 Published by Siemens Healthcare GmbH © Siemens Healthcare GmbH, 2020 Master Template Effective Date: 3/5/2020 | HOOD05162003074494 Healthineers Job Aid Effective Date: 10/07/2020 | HOOD05162003132188 Page 3 of 3