systemGE HealthCareMRI

GE Signa Explorer 1.5T

Manufacturer: GE HealthCare · Modality: MRI

Compact / economy 1.5 T MRI in the Signa family. Positioned for space-constrained, capital-constrained, or emerging-market installations where the footprint and siting economics of Signa Artist or other 70 cm wide-bore 1.5 T systems don't fit. 60 cm bore, zero-boil-off helium architecture, SilentSuite noise reduction, and field-upgrade paths that let departments step into modern features without a full capital replacement.

Platform highlights

  • 60 cm bore — narrower than current 70 cm Signa class. Patient-comfort trade-off in exchange for reduced magnet footprint and lower siting demands.
  • Compact footprint — ~20% less siting space than traditional MRI per OEM positioning. Floor load and room geometry more forgiving than wide-bore 3 T.
  • Zero-boil-off helium magnet — cryogen management simplified; no routine helium refills (boil-off is the cost driver on legacy magnets).
  • Reduced power consumption — OEM cites up to ~34% energy savings vs prior Signa 1.5T generation.
  • SilentSuite — noise-reduction technology maintaining acoustic output <3 dB above ambient on supported sequences.
  • OpTix Optical RF — optical (rather than analog) RF signal path; claimed ~27% SNR gain over prior analog receivers.
  • AIR coil platform support — current-generation AIR conformal receive coils available as upgrade, bringing Explorer closer to Artist on coil workflow.
  • HyperSense, HyperCube — compressed-sensing acceleration technologies available in-field.
  • SIGNAWORKS host — shares the host software environment with the rest of the current Signa lineup.

Specs

  • 1.5 T · 60 cm bore
  • Gradients: 33 mT/m amplitude, 120 T/m/s slew
  • 16 selectable RF receive channels
  • Zero boil-off helium-cooled superconducting magnet
  • Reduced power consumption (up to ~34% vs prior generation)
  • SilentSuite (<3 dB above ambient on supported sequences)
  • OpTix Optical RF
  • AIR coil support (via upgrade)
  • SIGNAWORKS host

Clinical positioning

  • Community hospitals where capital and siting constraints favor a compact 1.5 T.
  • Outpatient imaging in space-limited buildings — the reduced-footprint argument is real.
  • Emerging markets where MRI capital, service, and power infrastructure favor an economy tier over a wide-bore premium system.
  • Retrofit installations — zero-boil-off + smaller footprint + reduced power ease brownfield MRI deployment.

Relationship to siblings

  • Signa Artist 1.5T — 70 cm wide-bore sibling. Artist is the higher-capability choice when bore and workflow matter; Explorer is the choice when footprint and economics matter.
  • Signa Voyager 1.5T — wide-bore sibling with its own market position.
  • Signa HDxt 1.5T — legacy predecessor (60 cm bore, pre-current Signa host architecture).
  • Signa Premier 3T — 3 T counterpart in the current Signa family.

Field-upgrade path

Explorer units can receive selected software and coil upgrades (AIR coils, HyperSense, AIR Recon DL availability depending on revision) without chassis replacement. The GE Signa Evo upgrade program explicitly covers Explorer-era 1.5T installations.

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