GE CT tube left side gantry interface panel

GE Lightspeed VCT 64 (32) Slice

This page contains detailed information about GE Lightspeed VCT 64 and GE Lightspeed VCT 32 slice CT scanners. This includes technical specifications, key features, and directories to related resources.

Table of Contents

About GE Lightspeed VCT Scanner

The GE LightSpeed VCT scanner is a premium, 3rd generation CT scanner. This system is equipped to support all the clinical applications that are currently supported by the GE LightSpeed CT product line.

The standout feature of the GE LightSpeed VCT scanner is its unique capability to collect scan data from 64 rows (VCT64) or 32 rows (VCT32) simultaneously. This is a significant improvement compared to the GE LightSpeed Pro16, which is limited to 16 rows of data collection. This enhanced data collection capability allows for more detailed and comprehensive imaging.

pet scan machine price front of PET-CT scanner GE Optima PET scanner

The LightSpeedVCT scanner utilizes a “shorter” geometry compared to the HiSpeed CT/i and LightSpeed™ RT models. This shorter geometry offers a significant advantage due to the way X-ray intensity changes with distance. The benefit of this Lite geometry, measured at the ISO center, can be calculated by taking the ratio of 630 to 541 and squaring it. In this case, (630/541) 2 equals 1.36, which indicates a 36% improvement in X-ray flux utilization. Additionally, this shorter geometry reduces the centrifugal force exerted on the tube, allowing for faster rotational speeds during scanning.

GE Lightspeed VCT Related Links

GE Lightspeed VCT Technical Specifications

  • Console Type: GOC5 and GOC6
  • Host Computer: HP xw8000, HP XW8200, HPXW8400
  • Data Acquisition: 64 slice and 32 slice
  • Detector Type: VDAS
  • Software: 7x VCT
  • Monitors: 2 x 19-inch LCD
  • Table Weight Limit: 500lbs (227 kg)
  • Maximum Cradle Travel: VT 1700 (1700 mm) and VT 2000 (2000 mm)
  • Cradle Travel Speed: 0.5 -137.5 mm/sec
  • Tilt Limits: +30 to -30
  • Maximum rotation speed: 0.35 sec per revolution
  • CT Tube Type: Performix Pro VCT 100
  • Input Power: 3-Phase 480 V, 50/60 Hz
  • Maximum Power Demand: 150 kVA, 180 A @ 480 V
  • KV Selections: 80, 100, 120, and 140 kV

Scan Theory of Operations

The power distribution unit (PDU) plays a crucial role in delivering power to the gantry and console of the imaging system. The CT gantry houses the essential components for producing X-ray. These components rely on high voltage produced by the generator to propel electrons from the X-ray tube filament to its anode, resulting in the production of both heat and x-radiation.

The capacity of the X-ray tube to handle heat and dissipate it determines the frequency and duration of CT exposures. For instance, a Helical or Cine exposure can last up to 60 seconds, while Axial exposures typically range from 0.4 to 2.0 seconds.

During the imaging process, the detector, equipped with a scintillator material, absorbs X-rays that pass through the patient. It then transforms this absorbed energy into light, which is subsequently converted into an electric current by the detector itself. The Data Acquisition System (DAS) works tirelessly, sampling each detector cell in all 32 or 64 detector rows around 1000 times per gantry rotation. It amplifies and quantifies the current, collecting the resulting data and transmitting it to the Image Generator (IG).

Each set of data acquired by the DAS is known as a view. These views are subsequently processed by the reconstruction engine, which combines them into a unified matrix of pixel values, forming an image. The display processor takes hold of this digital matrix data, converting it into shades of gray resembling those seen on television screens. The finalized image is then sent to the CRT monitor or LCD for display. The operator console (OC) serves as the control center, housing the CRT monitor, and overseeing the operations of the computer, X-ray machine, and cradle drives.

Overview

In conclusion, the GE lightspeed VCT platform remains one of the most popular choices for advanced CT imaging capabilities. Whether choosing the Lightspeed VCT 64 or Lightspeed VCT 32 variant, you’re imaging center will benefit from upgraded design features and enhanced image clarity. The LightSpeed VCT’s unique “shorter” geometry provides superior X-ray flux utilization, resulting in improved image quality and reduced scanning time.

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