Siemens Definition AS

Description

Overview

The Siemens SOMATOM Definition AS is designed to eliminate patient exclusions caused by physical size, high heart rates, or motion limitations. Engineered as an adaptable single-source platform, facilities can start with an entry-level slice configuration and seamlessly scale up to 128 slices on-site as clinical requirements grow.

Featuring a generous 78 cm (or 80 cm Open) gantry bore and a high-capacity patient table supporting up to 227 kg to 300 kg (661 lbs), the Definition AS easily accommodates bariatric patients, trauma access, and radiation therapy immobilizers. Driven by the STRATON™ X-ray tube with direct-oil cooling, the scanner maintains continuous high-mA output without mid-procedure thermal wait times.

Key Features & Advanced Technologies

• STRATON™ Direct-Cooled Tube Technology: Uses direct-oil cooling to achieve an effective cooling rate of 7.3 MHU/min. This eliminates tube heat storage delays during back-to-back, high-mA trauma or whole-body CTA protocols.

• Stellar Detector Array (Optional Upgrade): Digitizes signals directly at the detector photodiode level (TrueSignal technology) to minimize electronic noise, expand dynamic range, and deliver sharp 0.33 mm isotropic resolution.

• Adaptive Dose Shield: Dynamically blocks unproductive pre- and post-spiral radiation, cutting unnecessary patient dose exposure by up to 15% during helical scanning.

• SAFIRE™ & ADMIRE Iterative Reconstruction: Advanced model-based iterative reconstruction tools that lower radiation dose requirements by up to 60% while maintaining low-contrast detail and spatial clarity.

• Adaptive 4D Spiral Coverage: Enables continuous dynamic volume scanning extending up to 42 cm Z-axis coverage for organ perfusion studies (such as acute stroke workups).

• FAST CARE Architecture:

  • FAST (Fully Assisting Scanner Technology): Automates FOV setting, patient positioning, and workflow steps.

  • CARE (Combined Applications to Reduce Exposure): Uses CARE kV to automatically tune tube voltage to the patient’s individual anatomy.

• Sliding Gantry Option: Available for surgical OR, trauma bay, and interventional suite configurations where the gantry moves along floor rails over a stationary bed.

Technical Specifications