MR Brain Spectroscopy Manual Shim - ELine

MR Brain Spectroscopy Manual Shim – E-line Job Aid MR Spectroscopy Manual Shim – E-Line Job Aid The shim quality is important for MR Spectroscopy examinations. The goal is to decrease the Full Width at Half Maximum (FWHM) and increase T2*. • If automatic adjustments produce a satisfactory FWHM as specified in the ranges listed be- low, no further interaction is needed. • If the automatic adjustment is not satisfactory, then interactive shimming can be used to improve examination results. MR Brain Spectroscopy – Ideal Shim (FWHM) values 1. SVS – FWHM Range a. 1.5T = <13 Hz b. 3T = <20 Hz 2. CSI – FWHM Range a. 1.5T = <20 Hz b. 3T = <25 Hz MR Brain Spectroscopy – Manual Adjustment 1. Register a Patient for a MR Brain Spectroscopy Examination a. Plan Measurement > Select Apply 2. Review Confirm Frequency Adjustment Results a. FWHM Satisfactory (e.g., No Manual Confirm Frequency Adjustment [csi_se_MULTI_135] Adjustment required) i. Select Continue FWHM [Hz] 18.6 ii. Select Apply – measurement Mag runs f [Hz] 123,155,437 123,160.545 Coil Combined ADC Frequency (sys) [Hz] 123157996 Frequency (temp) [Hz] 123157996 Apply Continue Cancel Help Unrestricted 0 Published by Siemens Healthcare GmbH © Siemens Healthcare GmbH, 2020 SIEMENS Master Template Effective Date: 3/5/2020 | HOOD05162003074494 Job Aid Effective Date: 06/23/2021 | HOOD05162003197723 Healthineers Job Aid |MR Brain Spectroscopy Manual Adjustments – E-Line Effective Date: 06/23/2021 | HOOD05162003197723 Confirm Frequency Adjustment [csi_se_MULTI_135] b. FWHM too High i. Select Cancel FWHM [Hz] 18.6 Mag f [Hz] 123.155.437 123,160,545 Coil Combined ADC Frequency (sys) [Hz] 123157996 Frequency (temp) [Hz] 123157996 Apply Continue Cancel Help 3. Open Spectroscopy Sequence (SVS/CSI) a. Select Options > Adjustments oll System Add-On Options Help spec test File Browser. 111111 7 IMA Adjustments ... 4/28/2021 Exam SAR Information ... HE2 Stimulation Info ... Maintenance ... Configuration ... Service ASS Viewing RPF HE4 5cm TP O TP O ₱13.4 -p2-MIND NORM FOV 2-220 SP.H.26.5 3D or>Sag(-7.3) =(0.6) FoV 220-220 T2 HASTE slice angle for csi 1 XXXXI Tra Cor(-6.7)>Sag(-0.2) Unrestricted 0 Published by Siemens Healthcare GmbH © Siemens Healthcare GmbH, 2020 SIEMENS Master Template Effective Date: 3/5/2020 | HOOD05162003074494 Job Aid Effective Date: 06/23/2021 | HOOD05162003197723 Healthineers Page 2 of 7 Job Aid |MR Brain Spectroscopy Manual Adjustments – E-Line Effective Date: 06/23/2021 | HOOD05162003197723 4. Select Inter. Shim Tab – adjust FWHM by selecting individual gradients a. Adjust FWHM for [A11/B11/A10 Gradients] only i. X/A11 (X Gradient) ii. Y/B11 (Y Gradient) iii. Z/A10 (Z Gradient) iv. Note – Don’t adjust any other gradients • Perform adjustment one gradient at a time if needed to lower FWHM b. Select Measure – starts shim adjustment i. Infinite measurement is performed with the current set shim parameters ii. Monitor results for FWHM and T2* • Aim for Lowest FWHM possible c. Select X/A11 (X Gradient) i. Click X/A11 “Up Arrow” 2 Clicks at a Time • Monitor FWHM and T2* – wait for changes to populate New FWHM ii. Shim Results Worsens • Select Load Best (e.g., uses best shim results of current measurement) • Click X/A11 “Down Arrow” 2 Clicks at a Time iii. Shim Results Improve • Continue to adjust 2 Clicks at a Time. • Select Load Best (e.g., uses best shim results of current measurement) d. FWHM and T2* Still Unsatisfactory after X/A11 Adjustment i. Repeat Steps above for [Y/B11 (Y Gradient) & Z/A10 (Z Gradient)] e. Satisified with Shim Results – Lowest Value (FWHM) Reached i. Select Stop – satisified with FWHM and T2* Results ii. Select Load Best (e.g., uses best shim results of current measurement) iii. Select Apply – Shim results are applied to Spectroscopy Measurement Unrestricted 0 Published by Siemens Healthcare GmbH © Siemens Healthcare GmbH, 2020 SIEMENS Master Template Effective Date: 3/5/2020 | HOOD05162003074494 Job Aid Effective Date: 06/23/2021 | HOOD05162003197723 Healthineers Page 3 of 7 Job Aid |MR Brain Spectroscopy Manual Adjustments – E-Line Effective Date: 06/23/2021 | HOOD05162003197723 Manual Adjustments NO Amplitude [V] Int IP T2" [ms] FWHIM [HZ] Tendency My m_ListView 18,205 39 97 9.562 39 16.2 98 500.0 16,952 40 15.9 500.0 20,614 39 160 e 100 500.0 18.459 40 16.1 0 95 500.0 9.109 40 16.0 Coil Combined ADC Amplitude [V] 500.0 [Max| 483 Receiver Gain High t [ms] Physio Triggering Off Measure Mag Save Uncombined On 512 Stop Increment Min Max Temporary System E/A00 123157002 Apply X/A11 691.11 591.11 [Max| 17,788 Y/B11 1389.46 1389.46 FWHM [Hz] 16.1 Z/A10 -1111.67 1111.67 Load Tune-Up 2ª1A20 -248.59 248.59 f [Hz] ZX/A21 -180.63 -180.63 Load System Mag 123.157,492 123.158.490 ZY / B21 -209.66 -209,66 Load Best X3 Y3/A22 -7.67 -7.67 XY / B22 -161.83 -161.83 Reset Best Reset Frequency Transmitter 3D Shim Inter. Shim Water Supp. Show Close Help Unrestricted 0 Published by Siemens Healthcare GmbH © Siemens Healthcare GmbH, 2020 SIEMENS Master Template Effective Date: 3/5/2020 | HOOD05162003074494 Job Aid Effective Date: 06/23/2021 | HOOD05162003197723 Healthineers Page 4 of 7 Job Aid |MR Brain Spectroscopy Manual Adjustments – E-Line Effective Date: 06/23/2021 | HOOD05162003197723 5. Select Frequency Tab a. Click GO – Frequency Adjustment Runs i. Click GO Again until Delta [Hz] Column Shows 0 (+/- 2) b. Select Apply c. Select Close i. Manual Adjustments are completed Manual Adjustments No Amplitude [V] Frequency (old) [Hz) Della [Hz) equency (new) [Hz] FWHM [HZ] Converged 500.0 123,157 996 123,157.989 17.8 Yes 500.0 123,157.989 123,157.000 17.4 Yes 3 500.0 123.157.990 10 123.157.990 17.8 Yes My m_ListView Coil Combined ADC Frequency (sys) [Hz] 123157990 Frequency (temp) [Hz] 123157990 Apply Amplitude [V] 500.0 Go Sequence & Resolution STEAM 10 Hz|+ Abort Receiver Gain High Physio Triggering Save Uncombined On |Max] 177,658 FWHM [Hz] 17.8 Mag f [Hz] 123,155.431 123.160,539 Reset Frequency Transmitter 3D Shim Inter. Shim Water Supp. Show Close Help Unrestricted 0 Published by Siemens Healthcare GmbH © Siemens Healthcare GmbH, 2020 SIEMENS Master Template Effective Date: 3/5/2020 | HOOD05162003074494 Job Aid Effective Date: 06/23/2021 | HOOD05162003197723 Healthineers Page 5 of 7 Job Aid |MR Brain Spectroscopy Manual Adjustments – E-Line Effective Date: 06/23/2021 | HOOD05162003197723 6. Select Apply > Confirm Frequency Adjustment Window Opens a. Hint: Confirm FWHM is satisfactory in the Ranges listed above b. Select Continue – Spectroscopy Measurement Runs Confirm Frequency Adjustment [csi_se_MULTI_135] IMavl 177 AGR FWHM [Hz) 17.8 Mag [Hz] 123.155.431 123.160,539 Coil Combined ADC Frequency (sys) [Hz] 123157990 Frequency (temp) [Hz] 123157990 Apply NOTE: system frequency manipulation might result in a slice shift in the following measurement. Continue Cancel Help Unrestricted 0 Published by Siemens Healthcare GmbH © Siemens Healthcare GmbH, 2020 SIEMENS Master Template Effective Date: 3/5/2020 | HOOD05162003074494 Job Aid Effective Date: 06/23/2021 | HOOD05162003197723 Healthineers Page 6 of 7 Job Aid |MR Brain Spectroscopy Manual Adjustments – E-Line Effective Date: 06/23/2021 | HOOD05162003197723 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. 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. 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