Adam A H, Robinson H P, Fleming J E, Hall A J
Br J Obstet Gynaecol. 1978 Jul;85(7):487-91. doi: 10.1111/j.1471-0528.1978.tb15619.x.
In 131 patients a comparison was made between measurements obtained using a real-time scanner and those obtained using a conventional "B" scanner with an attached "coded cephalometry system": 69 per cent of the readings agreed within +/- 2 mm and, when the "B" scan reading was considered "good", 90 percent fell within this range. Between 14 and 28 weeks, gestational age diagnoses using the two methods were within one week of each other in 88 of 89 patients.
对131名患者进行了比较，比较使用实时扫描仪获得的测量结果与使用配备“编码头颅测量系统”的传统“B”扫描仪获得的测量结果：69%的读数在±2毫米范围内一致，当“B”扫描读数被认为“良好”时，90%的读数在此范围内。在14至28周期间，89名患者中有88名使用这两种方法诊断的胎龄相差在一周以内。
