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Linatron Accessories


Collimaters can be attached to Linatron systems along the primary beam path to shape the beam for specific applications. Fixed collimaters are circular disks (usually Tungsten) with openings that can be cut to the user's specifications. Variable collimaters are also available when frequent changes of the beam shape are necessary.

  • Fixed collimater (specify opening)
  • Variable external collimator with remote control
  • Variable external collimator with rotation

Communication Port Options

Linatron systems are self-contained and do not require communication to external devices for normal operation. However, an optional PC interface can be provided which allows a PC to replace the standard control console. The following communication options are available when using the optional PC interface:

  • Mod buss
  • Ethernet


A complete documentation package is included with every Linatron system. The following additional document packages can be ordered. Please include the serial number of your system when you inquire about extra documentation.

  • Additional Touch Screen Console Operator's Manual
  • Additional Desktop PC Console Operator's Manual
  • Additional Maintenance Manual
  • Additional Data Book

Exposure Meter

Rad Cal 2026 Single Sensor Exposure Meter

Flattening Filters

The natural beam emerging from a Linatron has a peak dose in the center of the beam and reduced dose as the angle increases. This flatness is typically measured as a percentage decrease in dose at 7.5 degrees off-axis from the beam center. While the unflattened dose depends on a number of factors (e.g. energy, target material) it is typically 55%-60% flat. Flattening filters are custom designed based on unique customer requirements, but are often designed to improve flatness to about 85%. Because a flattening effect occurs by absorbing more dose at the center of the beam, the overall dose rate is typically reduced by about 50%.

Flattening filters are circular disks that are a factory installed option. The disk is mounted on a slide that can be manually positioned in front of the beam, or alternately slid away from the beam to disable its function. An electrical switch provides feedback to the Linatron to indicate on the console whether the flattening filter is in use.

Laser Direction Aids

  • Standard laser
  • Dual Plane alignment laser

Motorized Tables

Varian can help select a motorized table per your requirements. Please contact your sales person or call us.

Shielding Options

Additional shielding provides greater reduction of leakage radiation, which is defined as radiation outside of a 60 degree cone along the central beam axis. Leakage is measured along the horizontal axis.

Spare Parts Kits

Spare parts kits are available for most Linatron systems. These allow system owners to have selected components on-hand that will decrease the repair time for a number of common consumable and limited-life items.

Spot Size

The M9, K9, and K15 are available with small spot size options. Please refer to specific datasheets for the specifications relating to standard spot sizes and the small spot size options.

Temperature Control Units

Varian Linatron systems typically require fluidic cooling with a water/antifreeze mixture at a constant 30 degrees C. Varian provides a number of temperature control units for this purpose. Please refer to the selection guide PDF link at the bottom of this page for more information.


Varian typically offers factory training at two levels. Operators' classes cover the basic information required for a qualified person to safely operate a Linatron system. Maintenance classes provide a more in-depth understanding of Linatron design for those who are qualified to perform maintenance.

Voltage Regulators

Varian voltage regulators are optional components used with Linatron systems when the facility power is under-regulated or operating at an incompatible voltage. When needed, these are custom configured for a specific Linatron operating at a specific location. Varian engineers are available to help ensure that the power at a particular site is appropriate for reliable Linatron operation.

The Power Line Conditioner consists of an all copper, multiple tapped, triple shield isolation transformer. The low output impedance of the transformer in conjunction with the electrostatic shields assures precision hospital grade performance with excellent noise and transient attenuation. Independently controlled inverse parallel electronic switches for each of the 7 taps per phase provide tight regulation over a wide input range. Linear devices are used for line synchronization to prevent phase shift errors normally associated with simple CT zero current crossing acquisition. The microprocessor control accurately selects the correct tap to maintain the output no greater than +2.5% of nominal with a typical AC input, correcting for voltage disturbances within one cycle. Digital processing technique provides fast and accurate regulation without output voltage over or undershoots.


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