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Varian Single Energy Linear Accelerator Comparison Chart
Models Clinac 6EX Clinac 600C/CD Clinac 4/100, 4/80, 6/100 Clinac 6X
Years(s)
Manufactured*		  1999 & newer 1989 & newer Older Older
Powersource Magnetron  Magnetron  Magnetron  Magnetron
Photon Energy
Configuration		  4 MV or 6 MV  4 MV or 6 MV   4 MV or 6 MV 6 MV
Electron Energies  N/A  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) 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)		 N/A N/A
Portal Imager
(EPID)**		 aSi500, aSi1000 (optional) LC250, aSi500, aSi1000 (optional) N/A N/A
Treatment Delivery  3D, IMRT, SRS (optional) 3D, IMRT, SRS (optional) 2D, 3D 2D
KV Imaging for IGRT OBI (only certain serial numbers apply) N/A N/A N/A
CBCT OBI (only certain serial numbers apply) N/A N/A N/A
Stereotactic
Radiosurgery**		  Optional Cones or mMLC Optional Cones or mMLC Cones  N/A
Treatment Couch Exact ETR, Exact (optional) PSA/ETR  PSA
Demand/Resale
Value***		  $$$  $$ $ N/A
*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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