systemGE HealthCareCTfamily: lightspeed

GE LightSpeed VCT XT

Family: LightSpeed · Modality: CT
Variant siblings: VCT Select · VCT (base)

Top-tier configuration of the 64-slice LightSpeed VCT platform. Combines the V-Res 40 mm detector, 100 kW Performix Pro VCT 100 tube (8.0 MHU heat capacity), SnapShot Pulse cardiac gating, Volume Shuttle perfusion, and licensed ASiR iterative reconstruction into a single bundled tier. The dominant 64-slice CT in the global refurbished install base; the benchmark most other legacy 64-slice systems are compared against.

What's bundled at XT vs Select / base

  • V-Res 40 mm detector — 40 mm Z-axis active coverage per rotation, better Z-axis uniformity than the pre-V-Res detector shipped on Select and base.
  • ASiR — licensed. Enables low-dose protocols that pre-iterative reconstruction VCT systems can't run.
  • Volume Shuttle — cone-beam-style dynamic perfusion over the 40 mm detector. Enables whole-brain and whole-organ dynamic perfusion protocols that require back-and-forth table motion.
  • SnapShot Pulse — prospective cardiac gating for coronary CTA.
  • 0.35 s minimum rotation (vs 0.4 s on Select, 0.5 s on base).
  • Host software — ships with 5.x, most active units have been upgraded through 6.x revisions.

Specs

  • 64 slices · 70 cm gantry aperture
  • V-Res 40 mm detector
  • Performix Pro VCT 100 tube · 8.0 MHU heat capacity · 1608 kHU/min cooling
  • 100 kW high-frequency generator · up to 140 kVp / 800 mA
  • ASiR iterative reconstruction (licensed)
  • SnapShot Pulse cardiac gating + Volume Shuttle perfusion
  • Host software 5.x / 6.x generation

Clinical positioning

  • Cardiac — SnapShot Pulse prospective-gated coronary CTA at 64-slice coverage. Limited compared to dual-source or wide-coverage Revolution platforms for high-heart-rate patients.
  • Body / oncology — routine abdomen-pelvis with ASiR dose reduction.
  • Neuro — stroke protocols including perfusion via Volume Shuttle.
  • Trauma — fast whole-body acquisition at 40 mm coverage per rotation.
  • Interventional adjunct — biopsy / drainage with the broad 70 cm gantry.

Successor and upgrade path

Revolution-generation platforms (Revolution HD, Revolution Apex) replaced VCT XT in new orders. VCT XT chassis are not field-upgradable to Revolution; replacement is the standard path. The VCT XT remains in service at thousands of sites as its large parts ecosystem and well-understood service model continue to favor keeping the system running.

Parts

Field guide

Tube discipline (warm-ups, duty cycle), DAS faults, chiller management, slip-ring wear patterns — see field-guide/ge-healthcare-lightspeed-vct.

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