TABLE 1.

Measurement results

Classification	Number of cases	Number of cases with errors within ±3 mm	Number of cases with errors over ±3 mm	Acceptable rate (%)
ET ≤ 3 mm	22	12	10	54.5
3 mm < ET ≤ 10 mm	130	124	6	95.4
ET > 10 mm	62	61	1	98.3
Total	214	191	23	89.3