Siemens SOMATOM Definition Edge
Family: Siemens SOMATOM Definition · Modality: CT
Siemens Healthineers' single-source 128-slice CT within the Definition family — sibling to the dual-source Definition Flash (premium dual-source) and Definition AS (single-source mainstream). The Edge sat at the single-source-premium tier, carrying the Stellar detector and a STRATON tube but without the dual-source two-tube architecture of the Flash. Effectively a "premium single-source" positioning that bridged the AS / Flash gap.
The Edge installed base remains in active service across community hospitals and outpatient imaging programs; it has been displaced in the current Siemens product line by the SOMATOM X.cite and SOMATOM go.Top generations.
Distinctive technology
- 128-slice acquisition (z-flying focal spot doubles native row count).
- Stellar detector with integrated ADC.
- STRATON tube — liquid-metal-bearing rotating-anode design.
- Tin (Sn) filtration mode for low-dose / low-keV-equivalent imaging.
- CARE Dose4D automatic exposure control.
- iTRiM / SAFIRE iterative reconstruction (license-dependent).
Variants in family
- Definition AS — single-source mainstream.
- Definition Edge (this card) — single-source premium.
- Definition Flash — dual-source flagship.
- SOMATOM Force — successor dual-source flagship.
Refurb posture
- Mature refurb supply — Definition-family installed base is large and turnover is steady.
- Stellar detector calibration history + STRATON tube hours are the principal due-diligence items.
- License-tier inheritance (SAFIRE / Sn filter / advanced apps) is a meaningful price variable.
- Service-network depth for Definition-family platforms is mature globally.