VISTA System
| Item | Parameter | Description or value |
|---|---|---|
| Detector modules | Type of module | Dual-layer phoswich (front layer: LYSO; back layer: GSO) |
| Phoswich element dimensions | 1.45 mm × 1.45 mm × 7 mm for LYSO and 1.45 mm × 1.45 mm × 8 mm for GSO (total length: 15 mm) | |
| Light decay time | LYSO: 40 ns; GSO: 60 ns | |
| Phoswich element arrays | 13 × 13 (outside dimensions: 20 mm × 20 mm) | |
| Phoswich pitch | 1.55 mm | |
| Phototubes | Hamamatsu R8520-C12 | |
| System | No. of detector modules | 36 (2 rings of 18) |
| No. of phoswich elements | 6,084 | |
| Total no. of crystals | 12,168 | |
| Ring diameter | 11.8 cm | |
| Gantry aperture | 8 cm | |
| Axial field of view | 4.8 cm | |
| Effective transaxial field of view | 6.7 cm | |
| Normalization or transmission source | 68Ge annulus | |
| Overall dimensions | 121 cm wide × 151 cm high × 82 cm deep | |
| Estimated gantry weight | ∼200 kg | |
| Power | 120 V alternating current, <20 A | |
| Datasets | Acquisition mode | 3D only |
| Total no. of lines of response | 28.8 million | |
| No. of 2D sinograms | 61 | |
| 2D sinogram size | 175 spatial samples × 128 angles | |
| 2D dataset size | 5.2 megabytes |