Article Figures & Data
Figures
- FIGURE 1.
Planar anterior view of thyroid scintigraphy from LEHR collimator and ME collimator.
- FIGURE 2.
Comparison of photon counts between LEHR collimator and ME collimator. (A) Total counts from whole rectangular field of view of collimator. (B–D) Counts within thyroid isocontour measured by applying 30% of threshold. A and D represent mean with SD. B and C represent median with interquartile range. *Significance was determined by Student t test. **Significance was determined by Mann–Whitney test.
- FIGURE 3.
Bland–Altman plot analyses of thyroid length measurement between ultrasonography with LEHR collimators (A) and ultrasonography with ME collimators (B). LOA = limit of agreement; US = ultrasonography.
- FIGURE 4.
Bland–Altman plot analyses of thyroid volume estimation between ultrasonography with LEHR collimators (A) and ultrasonography with ME collimators (B and C) by applying different thresholds.
Tables
Parameter LEHR ME Hole shape Hexagon Hexagon Number of holes (×1,000) 148 14 Hole length 24.05 mm 40.64 mm Septal thickness 0.16 mm 1.14 mm Hole diameter 1.11 mm 2.94 mm Sensitivity at 10 cm 5.46 cpm/kBq (99mTc) 7.43 cpm/kBq (67Ga) Geometric resolution at 10 cm 6.4 mm (99mTc) 10.8 mm (67Ga) System resolution at 10 cm 7.5 mm (99mTc) 12.5 mm (67Ga) Septal penetration 1.5% (99mTc) 1.2% (67Ga) Weight 22.1 kg 63.5 kg
