Table 3.

Instrumental variation in a phantom

Scan	5.0%	2.5%	2.0%	1.5%	1.0%	0.5%
1	-	-	-	-	-	-
2	−0.96%	0.02%	3.19%	5.53%	−1.88%	−1.98%
3	2.91%	−0.63%	−0.97%	−1.10%	1.78%	1.13%
4	−1.67%	0.72%	−4.67%	0.57%	−0.45%	−1.78%
5	1.66%	−2.60%	4.36%	−2.54%	−2.08%	1.71%
6	−3.73%	0.92%	−2.67%	0.23%	−0.30%	0.47%
7	2.12%	−2.60%	−1.61%	1.53%	−1.13%	−7.95%
8	1.34%	6.17%	5.49%	4.32%	3.86%	11.12%
9	−1.23%	−2.15%	−1.37%	−5.13%	−0.76%	−1.11%
10	0.87%	0.45%	2.98%	−1.29%	0.23%	−2.42%
11	−1.09%	−1.55%	−1.95%	4.65%	2.36%	1.12%
12	0.06%	−2.18%	−4.41%	−5.24%	−3.79%	−3.43%
13	0.30%	4.92%	7.41%	−0.04%	3.26%	4.55%
14	0.05%	−2.03%	−2.30%	5.41%	−0.58%	−2.67%
15	−1.31%	−2.44%	−2.57%	−4.45%	−1.68%	−6.86%
16	0.48%	−0.03%	0.23%	2.17%	−1.75%	9.51%
SD	1.70%	2.66%	3.71%	3.67%	2.14%	5.23%