Varian Single Energy Linear Accelerator Comparison Chart*

Models Clinac 6EX Clinac 600 C/CD Unique
Year(s)
Manufactured
 1999 & newer 1989 & newer 2012 & newer
Power Source Magnetron Magnetron Magnetron
Photon Energy
Configuration
4 MV or 6 MV 4 MV or 6 MV 6MV
Electron Energies N/A N/A N/A
Multi-Leaf
Collimator (MLC)**
80 MLC (Field size 40x40cm); 120 MLC (Field size 40x40cm, Central 20cm of field - 5mm leaf width, Outer 20cm of field - 10mm leaf width) (optional)
52 MLC (Field size 26x40cm, Leaf widths 10mm);
80 MLC
(Field size 40x40cm); 120 MLC (Field size 40x40cm, Central 20cm of field - 5mm leaf width, Outer 20cm of field - 10mm leaf width)
120 MLC
Portal Imager
(EPID)**
aSi500, aSi1000 (optional) (optional)
LC250, aSi500, aSi1000
aSi500II
Treatment Delivery  3D, IMRT, SRS (optional) 2D, 3D (optional), IMRT (optional), SRS (optional) 2D, 3D (optional), IMRT (optional), SRS (optional)
KV Imaging for IGRT** N/A N/A N/A
CBCT N/A N/A N/A
Stereotactic
Radiosurgery**
Optional Cones or mMLC Optional Cones or mMLC Optional Cones or mMLC
Treatment Couch Exact ETR, Exact (optional) Exact
Demand/Resale
Value***
$$-$$$ $-$$ $$
*Data shown here may not be accurate and is based on equipment seen in the secondary market. See manufacturers for exact data
**Similar devices are manufactured by vendors other than the linear accelerator manufacturer
***Five $$$$$ indicate that the resale demand for like systems is high, and used equipment will therefore command a higher price
Few dollar signs indicate that the resale demand is lower, and prices for used equipment is lower. One $ indicates very little, if any, value currently exists.

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