Ultrasound: Appears as a hypoechoic structure adjacent to the esophagus with posterior acousticenhancement, consistent with a simple cyst.
超声：表现为邻近食管的低回声结构，后方可见回声增强，与单纯囊肿相一致。
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The angular distributions of power and radiation enhancement factor strongly depend on the position of acoustic source relative to the unit-cell where the source is placed.
Objective To assess the relationship of different acoustic pressures and enhancement effects using self-made lipid ultrasound contrast agents on normal rabbit liver parenchyma.