共 11 条
[5]
FRANK JL, 1979, CLIN DIAGN ULTRASOUN, V2, P159
[6]
GREEN P S, 1977, Ultrasound in Medicine and Biology, V3, P129, DOI 10.1016/0301-5629(77)90065-5
[8]
LEOPOLD GR, 1980, RADIOL CLIN N AM, V18, P161