| Model | Artiste | Oncor (Impression, Expression, & Avante Garde) | Primus K | Primus M |
| Other Variations | Artiste | Impression, Expression, Avante Garde | ||
| Years Manufactured | 2009-2011 | 2004-2011 | 1998-2005 | 1998-2005 |
| Power Source | Klystron | Klystron, Magnetron | Klystron | Magnetron |
| Photon Energy Configuration | 6&10/15/18 | 6&10/15/18 | 6&10/15/18 | 6&10/15/18 |
| Electron Energies | Yes | Yes | Yes | Yes |
| Multi-Leaf Collimator (MLC)** | 160 MLC | 58; 82; 160 MLC (optional) | 58 MLC | 58 MLC |
| Portal Imager(EPID)** | Optivue (Amorphous Silicon) | Optivue (Amorphous Silicon) | BeamView, Optivue (optional) | BeamView, Optivue (optional) |
| Treatment Delivery | 3D, IMRT, VMAT, SRS/SBRT | 3D, IMRT, VMAT, SRS/SBRT | 3D, IMRT, SRS/SBRT (optional) | 3D, IMRT, SRS/SBRT (optional) |
| KV Imaging for IGRT** | K-Vision | N/A | N/A | N/A |
| M-Vision, In room CT (optional) | M-Vision | M-Vision | N/A | N/A |
| Stereotactic Radiosurgery** | Cones or MLC Based | Cones or MLC Based | Cones or MLC Based | Cones or MLC Based |
| Treatment Couch | TXT | ZXT or TXT | ZXT | ZXT |
| Market Demand*** |  |
|
 |
|
| Pros | Extremely affordable since Siemens exited linac market | Extremely affordable in the secondary market | Inexpensive in secondary market Good for parts to support newer machines Few available | Plentiful and inexpensive in secondary market Good for parts to support newer machines |
| Cons | Few available in the secondary market Requires R&V software to operate MLC | Few are being installed anymore Require expensive R&V software to operate MLC | Few are being installed anymore Require expensive R&V software to operate MLC | Few are being installed anymore Require expensive R&V software to operate MLC |
*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 stars indicate that the resale demand for like systems is high, and used equipment will therefore command a higher price. Few stars indicate that the resale demand is lower, and prices for used equipment is lower. One star indicates very little, if any, demand currently exists.
