SOMATOM go.Sim

by Siemens Medical Solutions USA  · Based in United States → — Simulation reinvented.
Oncology Radiology
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Regulatory Status Disclosed

Overview

SOMATOM go.Sim is an advanced Computed Tomography (CT) simulator developed by Siemens Healthineers, specifically designed to enhance precision and efficiency in radiation therapy planning. This integrated hardware and software solution aims to minimize errors and streamline complex workflows, ultimately reducing the time to treatment and improving patient outcomes.

The system incorporates artificial intelligence capabilities, including AI-powered Organ-at-Risk (OAR) autocontouring (DirectORGANS), which optimizes image reconstruction for deep learning algorithms to deliver consistent and high-quality contours. It features a mobile workflow, allowing radiation therapists to control the system via a tablet, enabling them to spend more time with patients and reducing anxiety. Integrated lasers (Direct Laser) facilitate streamlined patient marking and quality assurance.

SOMATOM go.Sim supports advanced imaging techniques such as 4D CT scanning with respiratory motion control (FAST 4D, Direct Intelligent 4D) to minimize motion artifacts, crucial for accurate treatment planning. Other features include iMAR for metal artifact reduction and TwinSpiral Dual Energy for superior soft-tissue contrast. The system boasts an 85 cm bore, accommodating various positioning accessories and enhancing patient comfort during simulation. It is built to provide a calming environment for patients and a user-friendly experience for staff, contributing to increased workforce productivity and optimized clinical operations.

Reviewed by Pouyan Golshani, MD — Interventional Radiologist

Key Features

  • AI-powered Organ-at-Risk (OAR) autocontouring (DirectORGANS)
  • Integrated hardware and software solution for CT simulation
  • Mobile workflow with tablet control (myExam Companion, Scan&GO)
  • Integrated lasers for precise patient marking (Direct Laser)
  • 4D CT scanning and respiratory motion management (FAST 4D, Direct Intelligent 4D)
  • iMAR (iterative Metal Artifact Reduction) algorithm
  • TwinSpiral Dual Energy for enhanced soft-tissue contrast
  • DirectSPR for particle therapy planning
  • 85 cm gantry bore for patient comfort and accessory accommodation
  • Streamlined, error-reducing workflows

Use Cases

  • Radiation therapy planning and simulation
  • Tumor delineation and dose calculation
  • Automated Organ-at-Risk (OAR) contouring
  • Patient positioning and marking for treatment
  • Low-dose lung cancer screening (as part of CT system indications)
  • Reducing motion artifacts in 4D CT imaging

What Physicians Need to Know

Key Capabilities
AI-based DirectORGANS for automated and consistent organs-at-risk (OAR) contouring, image optimization for target delineation and margins, and autocontouring. Features a mobile workflow with tablet control, integrated Direct Lasers for patient marking and quality assurance, and Respiratory Motion Management with FAST 4D to reduce motion artifacts. It also includes iMAR for metal artifact reduction and DirectDensity reconstruction for tailored kV settings and electron/mass density data. The system boasts an 85 cm bore for enhanced patient comfort and accommodation of positioning accessories.
Clinical Utility
Reduces variability in the starting point for treatment planning and significantly increases workforce productivity by streamlining CT simulation workflows. It aims to reduce errors in complex radiotherapy processes, potentially shortening time to treatment. DirectORGANS has been shown to save up to 70% of contouring time per OAR, delivering high-quality contours that approach consensus-based levels. The system provides precise contouring and patient modeling data, contributing to more accurate radiation therapy planning and an improved patient experience through a calming environment and patient-centric design.
Integration Options
SOMATOM go.Sim is presented as a single, integrated software and hardware solution covering the entire CT simulation process. It features integrated patient marking lasers and automated data transfer capabilities to Treatment Planning Systems (TPS) via DICOM, HL7, and IHE-RO standards. The system is also compatible with various respiratory motion management devices and includes integrated post-processing software.
Compliance Status
The SOMATOM go.Sim received U.S. Food and Drug Administration (FDA) 510(k) clearance as of December 12, 2019. It is subject to FDA regulations, including registration, listing, labeling, medical device reporting, and good manufacturing practice requirements (21 CFR Part 820). DICOM Conformance Statements are available for various software versions (e.g., syngo CT VB20A, VB10A, VA40).
Pricing Model
Specific pricing details are not publicly disclosed. However, Siemens Healthineers emphasizes 'greater TCO transparency with an all-in-one solution' and aims for a 'low total cost of ownership' within the SOMATOM go. platform.
User Experience
Designed with a simple operating concept and an intuitive user interface, the system facilitates a mobile workflow with tablet control, allowing staff to remain with patients to reduce anxiety and improve communication. It was co-created with over 300 radiation therapy specialists, focusing on reducing operator pressure and shortening the learning curve through flexible training. Users report the system is intuitive, easy to operate, and provides the right tools for radiation therapy.
Support Quality
Siemens Healthineers offers a single vendor service contract to simplify administration. The company provides online training through its Academy, including hardware overviews and job aids. The SOMATOM go. platform is designed for reliability and remote serviceability.
Implementation Complexity
Described as a single, integrated hardware and software solution, the SOMATOM go.Sim aims to simplify implementation. Its integrated components, such as patient marking lasers, eliminate the need for separate hardware, contributing to a smaller system footprint. The minimum room requirement for the system is 17.3 mu00b2 (186.2 ftu00b2).
Evidence Base
Clinical evaluations of DirectORGANS demonstrated a 70% time saving per OAR contouring, based on a study involving 50 CT datasets across 5 sites and 2140 OARs. A case study also reported a 60% reduction in OAR contouring time with DirectORGANS. The system's design was informed by collaboration with over 300 radiation therapy specialists.
Physician Tip

Leverage the AI-powered DirectORGANS for consistent and efficient OAR contouring to significantly reduce planning time and variability. Utilize the mobile workflow and patient-centric design to enhance patient comfort and communication during the simulation process. Pay attention to the optimized image quality and artifact reduction features (iMAR, FAST 4D) for precise target delineation, especially in challenging cases. The integrated nature of the system aims to streamline the entire CT simulation workflow, which can lead to faster treatment initiation.

The SOMATOM go.Sim is designed as a fully integrated hardware and software solution, minimizing the need for disparate systems. Its compatibility with DICOM, HL7, and IHE-RO standards ensures seamless data transfer to existing Treatment Planning Systems (TPS). The integrated Direct Lasers and post-processing software further enhance workflow integration, reducing manual steps and potential errors in the radiation therapy planning process.

Details

Category Oncology AI, Radiology & Imaging AI
Pricing Contact for pricing
  • Pricing is not publicly disclosed
  • Interested parties are encouraged to contact Siemens Healthineers for a quote or to discuss finance options
DeploymentOn-premise (physical CT scanner system)
Compliance
BAA AvailableUnknown AI-estimated
HIPAA CompliantUnknown AI-estimated
FDA Status 1 AI-estimated

SOMATOM go.Sim is part of the SOMATOM go. Platform CT Scanner Systems (K233650) cleared by the U.S. FDA on March 26, 2024. It is classified as a Computed Tomography X-ray System (21 CFR §892.1750, Class II, Product Code JAK). The system is intended for generating and processing cross-sectional images for diagnosis, treatment, radiation therapy planning, diagnostic/therapeutic interventions, and low-dose lung cancer screening in high-risk populations.
Integrations
EHR Not specified
Specialties Oncology, Radiology

What the Web Says

The Siemens Healthineers SOMATOM go.Sim is a dedicated CT simulator designed to optimize radiation therapy (RT) workflows by enhancing efficiency, minimizing errors, and reducing treatment preparation time. It features integrated hardware and software, including AI-powered contouring and a mobile workflow, aiming to improve both patient experience and user operations. The system is built to deliver reproducible and user-independent results, providing precise contouring and image optimization for target delineation.

Overall: Mixed

Strengths

  • Streamlined and error-free CT simulation workflows
  • AI-powered organs-at-risk (OAR) contouring (DirectORGANS) for consistent and precise results
  • Mobile workflow with a single tablet for increased flexibility and more time with patients
  • Improved patient experience with a calming environment and patient-centric design
  • Reduced radiation dose with low-dose technology and specific protocols for lung cancer screening and pediatric patients
  • Integrated lasers with automated QA for time-saving and error avoidance

Limitations

  • External lasers are not adjustable by users and require service calls if they drift
  • Siemens CTs can be significantly more expensive than similarly specced competitors (e.g., GE)
  • Customer support for radiation therapy specific issues has been criticized as slow and requiring multiple layers of contact
  • One diagnostic physicist expressed deep dissatisfaction, calling it a 'sham of a scanner'
  • Potential connectivity issues with external laser systems due to network communication

Based on reviews from: Siemens Healthineers, Reddit, Scribd, healthcare-in-europe.com, FDA, NC DHHS, Innolitics, Adaderana Biz English, Journal of Medical Physics, AKJournals

Last updated: 2026-07-19

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Press & Coverage

Varian, a Siemens Healthineers company
Varian and Siemens Healthineers Showcase New Solutions at ESTRO 2024
At ESTRO 2024, Varian, a Siemens Healthineers company, showcased new solutions including DirectSetup Notes, an advanced tool for SOMATOM go.Sim and SOMATOM go.Open Pro CT simulators, which allows RT staff to document patient setup information directly on the CT scanner's tablet. This innovation aims to enhance patient care by enabling staff to spend more time with patients and integrates recorded information into oncology information systems.
2024-05
Siemens Healthineers USA Press Room
FDA Clears Two Siemens Healthineers CT Systems Dedicated for Radiation Therapy Planning
The U.S. Food and Drug Administration (FDA) cleared the SOMATOM go.Sim and SOMATOM go.Open Pro CT systems from Siemens Healthineers, designed specifically for radiation therapy (RT) planning. These systems aim to reduce potential errors and treatment times by integrating hardware and software components like patient marking lasers and automated quality assurance.
2019-12
Radiology Imaging
Siemens Healthineers Debuts Two CT Systems for Dedicated Radiotherapy Planning
Siemens Healthineers introduced the Somatom go.Sim and Somatom go.Open Pro CT systems for radiation therapy planning at the 2019 ASTRO meeting. These systems feature an 85 cm bore, optional DirectLasers, and a GO with Green mobile workflow to enhance patient comfort and streamline the setup process.
2019-09
Medical Device Network
Siemens unveils new CT systems for radiation therapy planning - Medical Device Network
Siemens Healthineers unveiled the Somatom go.Sim and Somatom go.Open Pro CT systems, designed to improve radiation therapy planning with better medical images and more accurate radiation plans. These systems incorporate DirectORGANS software for automatic organs-at-risk contouring and Direct Intelligent 4D (Direct i4D) technology in the go.Open Pro for real-time breathing adaptation during scans.
2019-09
JCO Global Oncology - ASCO Publications
Evolution and Recent Radiation Therapy Advancement in Uganda: A Precedent on How to Increase Access to Quality Radiotherapy Services in Low- and Middle-Income Countries | JCO Global Oncology - ASCO Publications
In August 2023, the Uganda Cancer Institute (UCI) acquired a Siemens Healthineers Somatom go.Sim CT simulator unit, significantly enhancing its radiotherapy capabilities. This acquisition, alongside other brachytherapy and ultrasound units, has enabled a substantial increase in daily CT simulations and cervical cancer brachytherapy insertions.
2025-01
PMC
Impact of CT calibration curves on radiotherapy planning using diagnostic CT scans and a planning CT supporting DirectDensity reconstruction - PMC
A study investigated the impact of CT calibration curves on radiotherapy planning using a SOMATOM go.Sim dual-energy CT from Siemens Healthineers as part of the treatment planning chain. The research focused on evaluating the entire treatment planning chain with an Alderson phantom, comparing results from various diagnostic CTs with a planning CT calibrated for radiotherapy.
unknown
Siemens Healthineers USA
SOMATOM go. platform for Radiation Therapy - Siemens Healthineers USA
The SOMATOM go. platform, including the 64-slice SOMATOM go.Sim and 128-slice SOMATOM go.Open Pro, offers integrated hardware and software designed to streamline radiation therapy workflows. These systems aim to reduce errors, shorten procedure times, and improve staff efficiency through features like automated guidance and embedded patient marking lasers.
unknown
accessdata.fda.gov
July 3, 2025 Siemens Medical Solutions USA, Inc. Kenny M Bello Regulatory Affairs Professional 810 Innovation Drive KNOXVIL - accessdata.fda.gov
A 510(k) summary from the FDA indicates a new software version, SOMARIS/10 syngo CT VB20, for the SOMATOM go. Platform, which includes the SOMATOM go.Sim. This software update, based on previous versions, will be offered as an optional upgrade for existing SOMATOM go. Platform systems.
2025-07

Videos

Product demos, reviews, and walkthroughs for SOMATOM go.Sim.

View all on YouTube

Frequently Asked Questions

The SOMATOM go.Sim integrates AI, specifically through its DirectORGANS feature, to automate and optimize organs-at-risk (OAR) contouring directly at the CT scanner. This deep learning-based autocontouring reduces manual interaction, improves consistency, and significantly saves time in the delineation process, providing a more reliable starting point for treatment planning.
The SOMATOM go.Sim, including its AI features like DirectORGANS, has received U.S. FDA 510(k) clearance for dedicated radiation therapy planning. Physicians should note that, as of some past documentation, it did not yet fulfill all applicable General Safety and Performance Requirements according to the European Medical Device Regulation 2017/745 and UK Medical Devices Regulations 2002, and was not commercially available in those regions.
Yes, other CT simulators like Siemens' own SOMATOM go.Open Pro also offer advanced AI features for radiation therapy planning. Additionally, emerging technologies such as MRI-only radiation therapy planning, leveraging AI to generate synthetic CT images from MRI data, present an alternative approach to reduce ionizing radiation and streamline workflows.
Specific pricing for the SOMATOM go.Sim system is not publicly disclosed and can vary based on configuration, regional market, and additional services. Interested physicians or institutions should contact Siemens Healthineers directly or authorized distributors for a detailed quote and financing options.
While AI features like DirectORGANS aim to reduce variability and errors, physicians must maintain critical oversight as AI systems are only as good as their training data and algorithms. Concerns include potential biases in AI models, the risk of over-reliance leading to diminished critical thinking, and the necessity for trained healthcare professionals to operate and configure the features.
As an integrated medical device, SOMATOM go.Sim is designed to operate within secure hospital networks and adheres to established healthcare data security and privacy protocols. While specific technical details of data encryption or anonymization for AI processing are not extensively detailed in public materials, it is expected to comply with relevant regulations to protect sensitive patient information.
Clinical evaluations have demonstrated that DirectORGANS significantly reduces contouring time, with studies showing up to a 70% time saving per OAR compared to manual contouring. The AI-generated contours are designed to be consistent and of high quality, approaching the level of consensus-based contours, with over 95% of results being clinically usable or requiring only minor edits.

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Suggest an Edit → | Last Verified: 2026-04-19 | First Added: 2026-04-19
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