syngo.CT ASPECTS

X Job Aid Template (SH-Bree- Headline 36pt R236, G102, B2) syngo.CT ASPECTS This training material is based on the medical device syngo.CT ASPECTS. Disclaimer Please keep in mind that the user interface may differ slightly from what is shown in this docu- ment. The actual usage of the tool may differ slightly on the different host systems, for example on syngo.via, Syngo Carbon Space, syngo.via View&GO, AI-Rad Companion or on the scanner. The tool functionality defined in this document is applicable to any of the Siemens Healthineers products in which you find this tool. syngo.via AI-Rad Companion Scanner Syngo Carbon syngo.via V Space View&GO SIEMENS Published by Siemens Healthineers AG | © Siemens Healthineers AG, 2025 Healthineers Master Template Effective Date: 28 Mar 2025 | QR700020889 Job Aid Effective Date: 25 Jul 2025 | QR700026197 Job Aid | syngo.CT ASPECTS Job Aid syngo.CT ASPECTS: The syngo.CT ASPECTS is software that provides a reproducible quantitative grading system for CT head examinations. It helps identify visible ischemic changes in patients with suspected stroke- related circulation occlusion. The software is designed to process volumes without contrast. The Alberta Stroke Program Early CT Score (ASPECTS) is a grading system that scores from 0 (most severe) to 10 (least severe) for detecting early ischemic changes on non-contrast CT brain scans. It identifies 10 regions on each hemisphere based on an atlas and calculates the average Hounsfield unit (HU) values of the brain tissue voxels in each region: • Voxels that are too dark or too bright are excluded from the calculation. These voxels may contain liquor, old infarcts, bone, and calcifications. • For regions M1 through M6, the average HU value is based mainly on gray matter. • To confirm the calculation, review the results of the automatic measurements. Image requirements: To calculate results, consider different image requirements. Mandatory image requirements: • Non-contrast CT head scans • Axial reconstruction • Matrix size: 512 x 512 px Recommended image requirements: • Slice thickness: o 5 mm without plane alignment* o ≤ 1.5 mm with plane alignment* • Smooth kernel reconstruction *The system automatically adjusts image plane alignment to compensate for patient mispositioning, ensuring standard anatomical views. Published by Siemens Healthineers AG | © Siemens Healthineers AG, 2025 SIEMENS Master Template Effective Date: 28 Mar 2025 | QR700020889 Job Aid Effective Date: 25 Jul 2025 | QR700026197 Healthineers Page 2 of 6 Job Aid | syngo.CT ASPECTS Job Aid How to get the results: 1. Load and select a data set that meets the requirements. 2. In the Tool Gallery, click the ASPECTS icon . 3. A 2D image layout opens, and the ASPECT score calculation starts automatically. As the results of segmentation and image registration, overlays outline the 10 evaluated regions. 37.9 C 38.2 IC 35.9 IC 36.0 INS 31.0 X INS 33.6 L 37.0 L 38.6 M1 33.9 WM M1 36.1 M2 35.3 M2 36.2 M3 38.8 M3 38. M4 34.2 X M4 35.6 M5 33.5 X M5 35.4 M6 35.9 M6 36.5 ASPECT Score 7 For each hemisphere of the brain, the mean HU value of the voxels used is displayed next to the regions: • C: Caudate • INS: Insular ribbon • IC: Internal capsule • L: Lentiform nucleus • M1: Anterior MCA cortex • M2: MCA cortex lateral to the insular ribbon • M3: Posterior MCA cortex • M4: Anterior MCA superior territory • M5: Lateral MCA superior territory • M6: Posterior MCA superior territory Published by Siemens Healthineers AG | © Siemens Healthineers AG, 2025 SIEMENS Master Template Effective Date: 28 Mar 2025 | QR700020889 Job Aid Effective Date: 25 Jul 2025 | QR700026197 Healthineers Page 3 of 6 Job Aid | syngo.CT ASPECTS Job Aid Results: • Each calculation result marked with an X indicates a region with lower HU values compared to the other hemisphere. These regions are also outlined in red. • Bold text indicates regions visible in the slice. • Regions marked with WM, may have affected white matter. • Clearly visible hypodense areas (for example, old infarcts) are displayed with a thick yellow overlay. If these areas cover more than 70% of an ASPECTS region, they are excluded from the ASPECT score calculation. The corresponding HU value is replaced by a ” – “ . HU value and affectedness are marked with a dash ” – “ on the contralateral side. The HU value remains valid, but the regions are marked as non-evaluable. C 33.3 X C 39.3 X IC 36.2 IC 36.1 INS --- INS 37.8 - L 37.3 X L 41.1 M1 36.7 M1 38.5 M2 29.3 X M2 38.1 M3 38.5 X M3 39.6 M4 39.1 M4 39.4 M5 32.9 X M5 37.2 M6 32.8 M6 38 • If a hypodense area in an affected ASPECTS region (red outline) has a difference of more than two HU compared to the contralateral side (for example, acute infarcts), it is displayed with a thick red overlay. • Below the affected hemisphere, the automated ASPECT score provides a score from 0 (most severe) to 10 (least severe). Published by Siemens Healthineers AG | © Siemens Healthineers AG, 2025 SIEMENS Master Template Effective Date: 28 Mar 2025 | QR700020889 Job Aid Effective Date: 25 Jul 2025 | QR700026197 Healthineers Page 4 of 6 Job Aid | syngo.CT ASPECTS Job Aid Edit the results: Regions with lower HU values are outlined in red, and the corresponding average HU value is marked with an X. These regions are considered affected in the ASPECT score. You can edit the result only immediately after the evaluation with the ASPECTS plugin in MM Reading. 1. Click the region you want to edit. The edit mode activates automatically and is indicated by a ± symbol next to the mouse pointer. \ 2. If necessary, use the Hide graphics tool to hide or show the overlays. Some tools, like flipping the image, are not available. The 2D display type and image position are fixed. 3. To change the affectedness of a region, click the corresponding region. 4. To cancel your modifications and return to the original results, click the Cancel icon 0 in the mini toolbar. 5. To confirm the results, click the Confirm ASPECTS icon in the mini toolbar. The result se- ries is created. 6. If necessary, save the output image as an RGB output by right-clicking the ASPECTS icon in the Tool Gallery and selecting ASPECTS Properties. The ASPECTS Properties dialog box opens. ASPECTS Properties Create additional RGB output (secondary capture) OK Cancel 7. Check the Create additional RGB output (secondary capture) box and click OK. Published by Siemens Healthineers AG | © Siemens Healthineers AG, 2025 SIEMENS Master Template Effective Date: 28 Mar 2025 | QR700020889 Job Aid Effective Date: 25 Jul 2025 | QR700026197 Healthineers Page 5 of 6 Job Aid | syngo.CT ASPECTS Job Aid Please note that this learning material is for training purposes only. For the proper use of the software or hardware, please always use the Operator Manual or In- structions 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 Opera- tor Manual. Any material used in this training won’t 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 infor- mation 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 “Functional- ity”) 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 fic- tional and examples only. All rights, including rights created by patent grant or registration of a utility model or design, are reserved. Siemens Healthineers Headquarters Siemens Healthineers AG Siemensstr. 3 91301 Forchheim Germany Phone: +49 9191 18-0 siemens-healthineers.com Published by Siemens Healthineers AG | © Siemens Healthineers AG, 2025 SIEMENS Master Template Effective Date: 28 Mar 2025 | QR700020889 Job Aid Effective Date: 25 Jul 2025 | QR700026197 Healthineers Page 6 of 6