Table 4.
Densities of couch components of the Exact Couch and Sinmed Mastercouch.
| Structure | Assigned Density (g/cm3) | CT Image Density (g/cm3) | Manufacturer Reported Density (g/cm3) |
|---|---|---|---|
| Exact Couch: | |||
| Flat Panel | 0.53 | 0.12–0.47 | |
| Unipanel | 0.72 | 1.15–1.18 | 0.8 a |
| Movable Structural Rails | 1.15 | 1.28 | 1.5–1.7 a |
| Sinmed Mastercouch: | |||
| Standard | 0.60 | 0.06–1.0 | 0.5 b |
| Head & Neck | 1.00 | 0.07–1.25 | |
| Support Beam | 0.15 | not scanned | |
| Wedge | 0.48 | 0.8–1.0 | |
| Wedge Support | 1.40 | 1.2–1.3 | |
a
Obtained by dividing manufacturer's reported area density by observed non‐air thickness in couch part cross section.
b
Obtained using Pinnacle density override to comply with attenuation reported by manufacturer.