Varian 21EX Linear Accelerator

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Manufactured by: Varian

Category: Linear Accelerators

Varian Varian 21EX Linear Accelerator

High-Performance Varian 21EX Linear Accelerator for Advanced Treatment


The Varian 21EX Linear Accelerator is a robust system designed for clinicians seeking to provide advanced Intensity-Modulated Radiation Therapy (IMRT) treatments. This cutting-edge equipment offers a range of customizable energy options, making it suitable for a diverse patient population. With its precise focal spot size, the Varian 21EX ensures optimal portal imaging, enhancing treatment accuracy and effectiveness.


Engineered for efficiency, the Varian 21EX features selectable dose rates of up to 600 MU/min and supports two distinct photon beam energies of 6 MV and 18 MV. Clinicians can easily adjust the machine to meet specific clinical requirements, thanks to its capability for auto field sequencing and a selection of electron energies, complete with electron applicators.


Outstanding Features




    • Selectable dose rate of up to 600 MU/min for enhanced treatment speed
    • Two photon beam energy options: 6MV and 18MV
    • Auto field sequencing for streamlined operations
    • Flexible electron energy options tailored to patient needs
    • Includes electron applicators for versatile treatment
    • Exact couch design for stable, reproducible, and accurate positioning
    • Modes available for various specialized clinical procedures
    • Time-efficient dynamic wedge for improved workflow


    • Tight isocenter alignment among collimator, gantry, couch, and imagers
    • Instant beam-on capabilities with dynamic treatment control
    • Precise focal spot size ensures optimal portal imaging
    • Diverse energy options to cater to a wide patient demographic
    • High dose rates for increased throughput across the energy spectrum
    • Advanced electronic portal imaging systems
    • Optional integrated Varian multileaf collimator for enhanced treatment precision

For healthcare facilities aiming to elevate their radiation therapy capabilities, the Varian 21EX Linear Accelerator stands out as a reliable and versatile choice that combines advanced technology with operational efficiency.

Varian 21EX Linear Accelerator Specifications

  • Type: Linear Accelerator
  • Energy Levels: 6 MV and 18 MV
  • Dose Rate:
  • 6 MV: 300 cGy/min (3 Gy/min)
  • 18 MV: 300 cGy/min (3 Gy/min)
  • Field Size:
  • Maximum: 40 x 40 cm (15.7 x 15.7 in)
  • Treatment Delivery:
  • Static and dynamic
  • Imaging: Integrated kV imaging options available
  • Beam Modifiers:
  • Bolus
  • Wedge filters
  • Collimator:
  • Multi-leaf collimator (MLC) options
  • Control System:
  • Computerized control with user interface for treatment planning
  • Weight:
  • Approx. 1,800 kg (approximately 4,000 lbs)
  • Dimensions:
  • Length: 4 m (13.1 ft)
  • Width: 2.5 m (8.2 ft)
  • Height: 2.5 m (8.2 ft)
  • Power Requirements:
  • Voltage: 208/240 V
  • Frequency: 60 Hz
  • Cooling: Water-cooled system
  • Radiation Shielding: Yes, integrated shielding for safety requirements

Note: Specifications may vary based on specific configurations and upgrades.

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