A.聽(tīng)眥線 B.聽(tīng)眶線 C.聽(tīng)眼線10° D.聽(tīng)眶線20° E.聽(tīng)眉線25°
A.-700HU B.-800HU C.-900HU D.-1000HU E.-1100HU
A.物質(zhì)厚度的絕對(duì)值 B.物質(zhì)密度的絕對(duì)值 C.物質(zhì)衰減系數(shù)與水相比的相對(duì)值 D.物質(zhì)厚度的相對(duì)值 E.物質(zhì)衰減系數(shù)的絕對(duì)值