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MR Brain Spectroscopy Manual Shim - Numaris X

This Job Aid reviews workflow steps to perform MR Brain Spectroscopy manual shim adjustments.

MR Brain Spectroscopy Manual Shim – Numaris X Job Aid MR Spectroscopy Manual Shim – Numaris X 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 GO 2. Review Confirm Frequency Adjustment Results a. FWHM Satisfactory (e.g., No Manual Adjustment required) i. Select Continue ii. Select GO – measurement Confirm Frequency Adjustment runs b. FWHM too High i. Select Cancel FWHM [Hz] 35.0 Mag [Hz] 123.235,702 123.240.810 Col Combined ADG . Frequency (sys) [H] 123238259 Frequency Cemp) [Hal 123238259 Apply Continue Cance Unrestricted 0 Published by Siemens Healthcare GmbH © Siemens Healthcare GmbH, 2020 SIEMENS Master Template Effective Date: 3/5/2020 | HOOD05162003074494 Job Aid Effective Date: 06/21/2021 | HOOD05162003197717 Healthineers Job Aid |MR Brain Spectroscopy Manual Adjustments – Numaris X Effective Date: 06/21/2021 | HOOD05162003197717 3. Open Spectroscopy Sequence (SVS/CSI) a. Select System > Adjustments > Manual Adjustments Dot 6:53 min Auto 10.0x10.0x15.0 mm3 1.00 Routine Contrast Resolution Geometry System Sequence Coils Miscellaneous Adjustments Adjust Volume PTX Tx/Rx Adjustment Strategy Standard Adjustment Tolerance Auto (Maxi .. BO Shim Brain Adjust with Body Coil B1 Shim TrueForm Confirm Frequency Always Assume Silicone Adj. Water Suppr. v CoilShim Off Manual Adjustments 4. Select Inter. Shim Tab – adjust FWHM by selecting individual gradients a. Adjust FWHM for [A11/B11/A10 Gradients] only i. A11 (X Gradient) ii. B11 (Y Gradient) iii. 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 A11 (X Gradient) i. Click 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 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) Unrestricted 0 Published by Siemens Healthcare GmbH © Siemens Healthcare GmbH, 2020 SIEMENS Master Template Effective Date: 3/5/2020 | HOOD05162003074494 Job Aid Effective Date: 06/21/2021 | HOOD05162003197717 Healthineers Page 2 of 6 Job Aid |MR Brain Spectroscopy Manual Adjustments – Numaris X Effective Date: 06/21/2021 | HOOD05162003197717 d. FWHM and T2* Still Unsatisfactory after A11 Adjustment i. Repeat Steps above for [B11 (Y Gradient) & 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 Manual Adjustments No Amplitude Int |P T2* [ms] FWHM [Hz] endency |151 500.0 9,654 500.0 20 26.5 O 152 8,807 20 26.0 153 500.0 9.957 20 26.9 154 500.0 9,212 20 26.8 155 500.0 9.212 20 26.8 109 500.0 8,636 22 25.8 Coil Combined ADC Uncomb. On Amplitude [V] 500.0 [Max] 437 Receiver Gain High Measure t [ms) Physio Triggering Off Stop mag 0 Increment Min Max 512 Temporary System A00 [Hz] 123238256 + 123238259 A11 [uT/m] 823.17 23.17 Apply B11 [uT/m] -344.72 338.08 [Max| 8,794 A10 [UT/m] 977.97 977.97 FWHM [H2] 26.8 A20 [01/m] -236.84 -236.84 Load Tune-Up A21 [uT/m3] -41.89 mag 187 -41.89 Af [Hz] +366 -245.97 Load System mag THZ] B21 [UT/m] -245.97 123.237.756 123.238.754 A22 [uT/m2] 194.28 194.28 Load Best B22 [uT/m3] -10.00 10.00 Reset Best Global Reset Frequency Transmitter 3D Shim Inter. Shim B1 Shim Water Supp. Show Successfully measured adjustment parameters. Close Unrestricted 0 Published by Siemens Healthcare GmbH © Siemens Healthcare GmbH, 2020 SIEMENS Master Template Effective Date: 3/5/2020 | HOOD05162003074494 Job Aid Effective Date: 06/21/2021 | HOOD05162003197717 Healthineers Page 3 of 6 Job Aid |MR Brain Spectroscopy Manual Adjustments – Numaris X Effective Date: 06/21/2021 | HOOD05162003197717 5. Select Frequency Tab a. Click GO – Frequency Adjustment Runs i. Click GO Again until Delta Column Shows 0 (+/- 2) b. Select Apply c. Select Close Manual Adjustments ? X No |Amplitude[V]| Frequency old[Hz] Delta requency new[Hz] FWHM[Hz] Converge 500.0 123,238,261 123,238,254 27.0 Yes 500.0 123,238.254 123,238,256 26.9 Yes 3 500.0 123,238,256 123,238,256 27.4 Yes Coil Combined ADC Frequency (sys) [Hz] 123238256 Frequency (temp) [Hz] 123238256 Appl Amplitude [V] 500.0 Go Sequence Resolution STEAM 10 Hz Abort Receiver Gain High Physio Triggering Off Save Uncombined On |Max| 58,924 FWHM:[Hz] 27.4 mag 291 A [HZ] +1,550 mag 123.235.697 f [Hz] 123.240.805 Reset Frequency Transmitter 3D Shim Inter. Shim B1 Shim Water Supp. Show Successfuly measured adjustment parameters Close i. Manual Adjustments are completed Unrestricted 0 Published by Siemens Healthcare GmbH © Siemens Healthcare GmbH, 2020 SIEMENS Master Template Effective Date: 3/5/2020 | HOOD05162003074494 Job Aid Effective Date: 06/21/2021 | HOOD05162003197717 Healthineers Page 4 of 6 Job Aid |MR Brain Spectroscopy Manual Adjustments – Numaris X Effective Date: 06/21/2021 | HOOD05162003197717 6. Select GO > 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 ? X IMax1 58 024 FWHM [Hz] 27.4 Mag f [Hz] 123.235.697 123.240.805 Coil Combined ADC Frequency (sys) [Hz] 123238256 Frequency (temp) [Hz] 123238256 Apply Continue Cancel Unrestricted 0 Published by Siemens Healthcare GmbH © Siemens Healthcare GmbH, 2020 SIEMENS Master Template Effective Date: 3/5/2020 | HOOD05162003074494 Job Aid Effective Date: 06/21/2021 | HOOD05162003197717 Healthineers Page 5 of 6 Job Aid |MR Brain Spectroscopy Manual Adjustments – Numaris X Effective Date: 06/21/2021 | HOOD05162003197717 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. Copyright © Siemens Healthcare GmbH 2020 Siemens Healthineers Headquarters Siemens Healthcare GmbH Henkestr. 127 91052 Erlangen, Germany Phone: +49 9131 84-0 siemens-healthineers.com Unrestricted 0 Published by Siemens Healthcare GmbH © Siemens Healthcare GmbH, 2020 SIEMENS Master Template Effective Date: 3/5/2020 | HOOD05162003074494 Job Aid Effective Date: 06/21/2021 | HOOD05162003197717 Healthineers Page 6 of 6