Table 4 Spatial resolution (FWHM), image noise (CVBG), and lung count error (ΔNLung) determined using the NEMA image quality phantom filled with 99mTc and 166Ho in different phantom setups (spheres without background, contrast 8:1 and 4:1, normal and obese phantom setup) with standard and adapted acquisition parameters (collimator type, reduced projection time). For measurements performed twice, results are presented as the mean and standard deviation
From: Gamma camera imaging characteristics of 166Ho and 99mTc used in Selective Internal Radiation Therapy
Phantom setup | FWHM (mm) | CVBG (%) | ΔNLung (%) | |
|---|---|---|---|---|
8:1 contrast | 99mTc | 12.2 ± 0.1 | 7.6 ± 0.1 | 23.5 ± 1.2 |
99mTc obese | 12.6 | 8.4 | 26.9 | |
99mTc MELP | 14.3 ± 0.2 | 6.8 ± 0.3 | 26.8 ± 1.4 | |
99mTc MELP 1.5 s | 14.3 | 15.8 | 23.8 | |
166Ho | 15.2 ± 0.1 | 18.0 ± 0.9 | 30.9 ± 1.1 | |
166Ho obese | 15.6 | 22.6 | 33.3 | |
4:1 contrast | 99mTc | 12.7 | 7.2 | 23.1 |
99mTc MELP | 15.4 | 7.2 | 24.6 | |
99mTc MELP 1.5 s | 15.3 | 14.5 | 23.6 | |
166Ho | 16.0 | 17.7 | 31.8 | |
Spheres without background | 99mTc | 10.1 | - | - |
99mTc MELP | 12.0 | - | - | |
99mTc MELP 1.5 s | 12.2 | - | - | |
166Ho | 12.5 | - | - | |