Micro Hollow Sphere phantom - sphere diameter (mm) | NEMA body phantom - sphere diameter (mm) | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
Ratio 8:1 | 4 mm | 5 mm | 6 mm | 8 mm | 10 mm | 13 mm | 17 mm | 22 mm | 28 mm | 37 mm |
2 mm max | 12.53 | 34.82 | 71.23 | 134.50 | 104.68 | 157.51 | 159.30 | 162.70 | 152.06 | 148.02 |
4 mm max | N/A | 25.58 | 44.71 | 84.76 | 84.32 | 151.31 | 181.45 | 169.86 | 167.41 | 161.28 |
% change | 36 | 59 | 59 | 24 | 4 | -12 | -4 | -9 | -8 | |
2 mm mean | 11.99 | 24.84 | 55.10 | 75.80 | 55.69 | 76.75 | 89.86 | 100.92 | 108.16 | 115.50 |
4 mm mean | N/A | 17.41 | 40.95 | 55.58 | 54.73 | 78.83 | 93.99 | 107.44 | 116.37 | 123.83 |
% change | 43 | 35 | 36 | 2 | -3 | -4 | -6 | -7 | -7 | |
Ratio 4:1 | 4 mm | 5 mm | 6 mm | 8 mm | 10 mm | 13 mm | 17 mm | 22 mm | 28 mm | 37 mm |
2 mm max | N/A | 6.33 | 20.19 | 41.57 | 31.20 | 59.06 | 68.97 | 65.49 | 66.91 | 67.42 |
4 mm max | N/A | N/A | 17.13 | 37.28 | 30.46 | 57.33 | 80.41 | 77.47 | 76.63 | 71.95 |
% change | 18 | 12 | 2 | 3 | -14 | -15 | -13 | -6 | ||
2 mm mean | N/A | 5.73 | 16.51 | 24.55 | 17.42 | 29.96 | 34.68 | 38.24 | 43.13 | 48.28 |
4 mm mean | N/A | N/A | 16.04 | 23.93 | 16.91 | 29.57 | 39.95 | 42.28 | 47.14 | 53.26 |
% change | 3 | 3 | 3 | 1 | -13 | -10 | -9 | -9 | ||
Ratio 3:1 | 4 mm | 5 mm | 6 mm | 8 mm | 10 mm | 13 mm | 17 mm | 22 mm | 28 mm | 37 mm |
2 mm max | N/A | N/A | 7.72 | 23.53 | 18.69 | 32.87 | 44.04 | 41.32 | 42.66 | 41.87 |
4 mm max | N/A | N/A | N/A | 16.13 | 18.18 | 31.84 | 45.27 | 49.36 | 48.04 | 47.15 |
% change | 46 | 3 | 3 | -10 | -8 | -9 | -9 | |||
2 mm mean | N/A | N/A | 6.11 | 13.45 | 11.28 | 16.93 | 21.28 | 22.58 | 25.55 | 28.23 |
4 mm mean | N/A | N/A | N/A | 10.66 | 11.01 | 16.91 | 23.39 | 25.56 | 28.58 | 31.47 |
% change | 26 | 2 | 0 | 9 | -9 | -9 | -9 | |||
Ratio 2:1 | 4 mm | 5 mm | 6 mm | 8 mm | 10 mm | 13 mm | 17 mm | 22 mm | 28 mm | 37 mm |
2 mm max | N/A | N/A | N/A | N/A | 5.49 | 15.68 | 19.40 | 22.51 | 22.90 | 22.73 |
4 mm max | N/A | N/A | N/A | N/A | 4.00 | 15.08 | 20.40 | 24.89 | 25.48 | 24.94 |
% change | 37 | 4 | -5 | -10 | -10 | -9 | ||||
2 mm mean | N/A | N/A | N/A | N/A | 1.64 | 6.93 | 7.59 | 9.95 | 11.97 | 13.85 |
4 mm mean | N/A | N/A | N/A | N/A | 1.37 | 6.54 | 8.44 | 11.18 | 13.32 | 15.18 |
% change | 20 | 6 | -10 | -11 | -10 | -9 |
Number of spheres | Median | Minimum | Maximum | |
---|---|---|---|---|
CNRmax 2 mm | 30 | 42.26 | 5.49 | 162.60 |
CNRmax4 mm | 30 | 46.21 | 4.00 | 181.45 |
CNRmean 2 mm | 30 | 25.56 | 1.64 | 115.50 |
CNRmean 4 mm | 30 | 27.15 | 1.37 | 123.83 |
CNRmax 2 mm; ≤ 13 mm | 14 | 33.84 | 5.49 | 157.51 |
CNRmax 4 mm; ≤ 13 mm | 14 | 31.15 | 4.00 | 151.31 |
CNRmean 2 mm; ≤ 13 mm | 14 | 20.98 | 1.64 | 76.75 |
CNRmean 4 mm; ≤ 13 mm | 14 | 17.16 | 1.37 | 78.73 |
CNRmax 2 mm; ≥ 17 mm | 16 | 54.76 | 19.40 | 162.70 |
CNRmax 4 mm; ≥ 17 mm | 16 | 60.65 | 20.40 | 181.45 |
CNRmean 2 mm; ≥ 17 mm | 16 | 31.45 | 7.59 | 115.50 |
CNRmean 4 mm; ≥ 17 mm | 16 | 35.71 | 8.44 | 123.83 |
Number of spheres | Median | Minimum | Maximum | |
---|---|---|---|---|
CRCmax 2 mm | 30 | 0.88 | 0.16 | 0.98 |
CRCmax 4 mm | 30 | 0.87 | 0.13 | 1.03 |
CRCmean 2 mm | 30 | 0.60 | 0.14 | 0.75 |
CRCmean 4 mm | 30 | 0.59 | 0.13 | 0.76 |
CRCmax 2 mm; ≤ 13 mm | 14 | 0.56 | 0.16 | 0.92 |
CRCmax 4 mm; ≤ 13 mm | 14 | 0.52 | 0.13 | 0.84 |
CRCmean 2 mm; ≤ 13 mm | 14 | 0.40 | 0.14 | 0.60 |
CRCmean 4 mm; ≤ 13 mm | 14 | 0.38 | 0.13 | 0.60 |
CRCmax 2 mm; ≥ 17 mm | 16 | 0.94 | 0.87 | 0.98 |
CRCmax 4 mm; ≥ 17 mm | 16 | 0.94 | 0.87 | 1.03 |
CRCmean 2 mm; ≥ 17 mm | 16 | 0.66 | 0.57 | 0.75 |
CRCmean 4 mm; ≥ 17 mm | 16 | 0.66 | 0.56 | 0.76 |
Micro Hollow Sphere phantom - sphere diameter (mm) | NEMA body phantom - sphere diameter (mm) | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
Ratio 8:1 | 4 mm | 5 mm | 6 mm | 8 mm | 10 mm | 13 mm | 17 mm | 22 mm | 28 mm | 37 mm |
2 mm max | 0.11 | 0.16 | 0.24 | 0.38 | 0.65 | 0.92 | 0.93 | 0.95 | 0.89 | 0.87 |
4 mm max | N/A | 0.15 | 0.21 | 0.33 | 0.51 | 0.84 | 0.99 | 0.93 | 0.92 | 0.89 |
% change | 2 | 14 | 17 | 26 | 10 | -5 | 2 | -2 | -2 | |
2 mm mean | 0.10 | 0.14 | 0.20 | 0.25 | 0.39 | 0.50 | 0.57 | 0.63 | 0.67 | 0.71 |
4 mm mean | N/A | 0.13 | 0.19 | 0.24 | 0.37 | 0.49 | 0.56 | 0.63 | 0.67 | 0.71 |
% change | 4 | 2 | 3 | 6 | 3 | 2 | 0 | 0 | 0 | |
Ratio 4:1 | 4 mm | 5 mm | 6 mm | 8 mm | 10 mm | 13 mm | 17 mm | 22 mm | 28 mm | 37 mm |
2 mm max | N/A | 0.21 | 0.28 | 0.40 | 0.57 | 0.87 | 0.98 | 0.94 | 0.96 | 0.96 |
4 mm max | N/A | N/A | 0.26 | 0.38 | 0.53 | 0.80 | 1.03 | 1.00 | 1.00 | 0.95 |
% change | 6 | 5 | 8 | 9 | -5 | -6 | -4 | 2 | ||
2 mm mean | N/A | 0.20 | 0.26 | 0.30 | 0.41 | 0.55 | 0.60 | 0.64 | 0.70 | 0.75 |
4 mm mean | N/A | N/A | 0.26 | 0.30 | 0.39 | 0.52 | 0.63 | 0.64 | 0.70 | 0.75 |
% change | 0 | 0 | 5 | 6 | -4 | -1 | 0 | -1 | ||
Ratio 3:1 | 4 mm | 5 mm | 6 mm | 8 mm | 10 mm | 13 mm | 17 mm | 22 mm | 28 mm | 37 mm |
2 mm max | N/A | N/A | 0.28 | 0.38 | 0.57 | 0.78 | 0.94 | 0.90 | 0.92 | 0.91 |
4 mm max | N/A | N/A | N/A | 0.36 | 0.53 | 0.71 | 0.89 | 0.94 | 0.93 | 0.91 |
% change | 7 | 7 | 9 | 6 | -1 | 0 | 0 | |||
2 mm mean | N/A | N/A | 0.26 | 0.31 | 0.64 | 0.54 | 0.61 | 0.62 | 0.67 | 0.71 |
4 mm mean | N/A | N/A | N/A | 0.31 | 0.43 | 0.51 | 0.60 | 0.63 | 0.67 | 0.71 |
% change | 1 | 5 | 5 | 1 | -1 | 0 | 0 | |||
Ratio 2:1 | 4 mm | 5 mm | 6 mm | 8 mm | 10 mm | 13 mm | 17 mm | 22 mm | 28 mm | 37 mm |
2 mm max | N/A | N/A | N/A | N/A | 0.57 | 0.79 | 0.87 | 0.94 | 0.95 | 0.94 |
4 mm max | N/A | N/A | N/A | N/A | 0.53 | 0.74 | 0.85 | 0.93 | 0.95 | 0.93 |
% change | 8 | 6 | 3 | 0 | 0 | 1 | ||||
2 mm mean | N/A | N/A | N/A | N/A | 0.48 | 0.60 | 0.61 | 0.66 | 0.71 | 0.75 |
4 mm mean | N/A | N/A | N/A | N/A | 0.47 | 0.58 | 0.61 | 0.67 | 0.71 | 0.74 |
% change | 2 | 4 | 0 | -1 | 0 | 1 |