共 15 条
[1]
ULTRASOUND EXPOSURE TIME IN ROUTINE OBSTETRIC SCANNING
[J].
BRITISH JOURNAL OF OBSTETRICS AND GYNAECOLOGY,
1987, 94 (09)
:843-846
[2]
CARSON PL, 1988, 22ND P ANN M NCRP, P308
[5]
GARDNER ES, 1987, LOTUS, V3, P50
[6]
HALL AJ, 1973, 2ND WORLD C ULTR MED
[7]
HALL AJ, THESIS U GLASGOW
[8]
NAKAIMA N, 1976, J WAKAYAMA MED SOC, V27, P107
[9]
POHLHAMMER JD, 1980, AAPM TECHNICAL MONOG, V6, P409