Percent Background variability for:

37 mm cold sphere

28 mm hot sphere

22 mm hot sphere

17 mm hot sphere

13 mm hot sphere

10 mm hot sphere

16:1

3.72

2.94

4.31

3.95

4.91

4.78

8:1

3.1

2.72

3.34

3.81

4.25

4.99

4:1

2.89

2.67

3.57

4.01

5.02

6.11