GE LightSpeed RT

The GE LightSpeed RT is a wide-bore, multi-slice CT scanner engineered specifically for radiation therapy (RT) planning, oncology, and high-throughput diagnostic radiology. Built with an extra-large 80 cm gantry bore, a 60 cm wide anatomical Field of View (FOV), and a flat-top patient couch, the LightSpeed RT easily accommodates radiation oncology positioning devices, patient immobilizers, and large patient contours. Powered by the Performix™ 6.3 MHU X-ray tube and GE’s Volumetrics acquisition technology, it delivers sub-millimeter isotropic resolution, fast 0.5-second rotation speeds, and 4D respiratory gating to track tumor motion during breathing cycles.

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Description

Overview

The GE LightSpeed RT is a dedicated radiation oncology simulation and diagnostic CT scanner designed to bridge the gap between diagnostic imaging and precise radiation therapy planning. Featuring an extra-wide 80 cm gantry aperture, the LightSpeed RT eliminates spatial constraints when positioning oncology patients with bulky breast boards, prone headrests, immobilizing vacuum cushions, or radiation masks.

Equipped with a 60 cm wide anatomical Field of View (FOV)—expanding beyond standard 50 cm diagnostic limits—the system captures skin-to-skin patient contours without edge truncation artifacts. Driven by the high-capacity Performix™ tube and GE’s Advantage Sim / Advantage 4D oncology software, clinicians can assess organ motion over time, contour target tumors accurately, and calculate precise radiotherapy treatment plans.

Key Features & Advanced Technologies

  • Extra-Large 80 cm Gantry Bore: Provides clearance for patient positioning devices, arm boards, and radiation therapy immobilization hardware.

  • 60 cm Wide Anatomical FOV: Extends reconstructive coverage to capture complete outer body contours, preventing edge artifacts in treatment planning calculations.

  • Flat-Top Oncology Couch: Specialty flat table surface designed to mirror radiation therapy linear accelerator (Linac) treatment beds, ensuring positional reproducibility between simulation and treatment delivery.

  • Advantage 4D Respiratory Gating: Tracks organ and tumor movement throughout the respiratory cycle, helping oncology teams calculate precise internal target volumes (ITV) for lung, esophageal, and abdominal cancers.

  • Performix™ 6.3 MHU X-Ray Tube: High-capacity tube designed to handle multi-phase oncology simulation runs without thermal delays.

  • ASiR™ (Adaptive Statistical Iterative Reconstruction): Optional low-dose iterative reconstruction engine that reduces radiation exposure by up to 40% while preserving low-contrast diagnostic detail.

  • SmartDose & DoseWatch Suite: Incorporates 3D mA Modulation (SmartScan / AutomA) to adjust tube output continuously based on body thickness and anatomy.

Technical Specifications

Parameter Specification
Slice Capability 16-Slice Acquisition per Rotation
Gantry Bore Aperture 80 cm Extra-Large Aperture Clearance
Reconstruction FOV 50 cm Standard up to 60 cm Wide FOV (Max Extended)
Gantry Rotation Speed Sub-second rotation down to 0.5 seconds
X-Ray Tube Type Performix™ 6.3 MHU Anode Capacity
Generator Output 53.2 kW (up to 440 mA capacity)
Spatial Resolution Up to 0.35 mm Isotropic Voxel Detail
Patient Table Design Carbon-fiber Flat-Top RT Couch
Patient Couch Capacity 204 kg (450 lbs) weight clearance

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