Table 2 Results from the spherical sources in water. Camera positions (a) and (b) are indicated in Fig. 2. The reference depth denotes the distance from the phantom surface to the source surface
From: Feasibility of 177Lu activity quantification using a small portable CZT-based gamma-camera
Collimator | MEGP | LEHR | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Sphere volume/mL | 7.8 | 15.3 | 7.8 | 15.3 | ||||||
Camera position | a | a | b | a | b | a | a | b | a | b |
Reference depth/mm | 24 | 67 | 71 | 61 | 65 | 24 | 67 | 71 | 61 | 65 |
Activity deviation w TEW/% | − 4 | − 13 | − 15 | − 13 | − 17 | 7 | − 10 | − 14 | − 10 | 5 |
Activity deviation wo TEW/% | 3 | − 10 | − 13 | − 14 | − 17 | 25 | − 4 | − 8 | 0 | 9 |
Depth deviation w TEW/mm | 2 | 5 | 4 | 11 | 7 | 8 | 6 | 3 | 8 | 12 |
Depth deviation wo TEW/mm | 5 | 9 | 5 | 8 | 5 | 11 | 12 | 7 | 13 | 13 |