center frequency and application parts of body

convex probe :3.5MHz, can test deep depth, we also call it abdominal probe, usually inspect liver, kidney, abdominal.

linear probe:7.5MHz, only test shallow depth, we also call it superficial probe, mainly inspect breast, arteries, neck blood flow, thyroid, facial organs, limbs.

transvaginal probe : 6.5MHz, put the probe to internal body, usually inspect uterus, endometrial cancer, uterine fibroids, pelvic mass, follicular monitoring, early ectopic pregnancy (before break), early pregnancy, placenta previa

phased probe: 3.0MHz, used as cardiac probe

凸阵探头中心频率一般是3.5MHZ，检测的深度比较深，我们称它腹部探头，通常检测肝脏，肾脏，小腹

高频线阵探头的中心频率一般是7MHZ以上，探测深度浅，也叫浅表探头，主要看乳腺，动脉，颈部血流、甲状腺、面部器官、四肢等

体腔探头中心频率一般是6.5MH，将探头直接放在体内进行超声检查，通常检测后位子宫、子宫内膜癌、子宫肌瘤、后盆腔肿块、卵泡监测、早期宫外孕（未破前）、早早孕、前置胎盘等

相控阵探头中心频率一般是3.0MHZ，一般作为心脏探头