肝胆疾病超声诊断.pptx

肝 胆 超 声;;;Mirror-image atifact;Because the sound travels more slowly in fluid than in the liver parenchyma, a large cyst can delay the passage of sound, causing the diaphragm to appear farther away than it is.;CT: a low-density lesion; drainage of Hepatic abscess ;Transabdominal and transcervical chorionic villus sampling (CVS),;;RAI;2;RHV;fissure for the ligamentum venosum (arrows);sagittal views: The fissure for the ligamentum venosumseparates the caudate lobe (C) from the lateral segment of the left lobe (LL). ;.(1) a large antegrade systolic wave caused by the movement of the tricuspid annulus toward the cardiac apex; (2) a small retrograde V-wave caused by right atrial overfilling; the V-wave is usually below the baseline but may be above the baseline; (3) an antegrade diastolic wave caused by the opening of the tricuspid valve and flow of the blood from the right atrium to the right ventricle; (4) a retrograde A-wave caused by right atrial contraction; and (5) a retrograde C-wave caused by the closure of the tricuspid valve at the beginning of systole, which may be seen in a few patients ;1.??????? The normal hepatic vein waveform consists of waves in the following sequence: (1) a large antegrade systolic wave caused by the movement of the tricuspid annulus toward the cardiac apex; (2) a small retrogradeV-wave caused by right atrial overfilling; the V-wave is usually below the baseline but may be above the baseline; (3) an antegrade diastolic wave caused by the opening of the tricuspid valve and flow of the blood from the right atrium to the right ventricle; (4) a retrograde A-wave caused by right atrial contraction; and (5) a retrograde C-wave caused by the closure of the tricuspid valve at the beginning of systole, which may be seen in a few patients ;A;B;DEBRIS CYST;1.The cysts become increasingly common with age, and the incidence is higher after 40 years of age, reaching 7% in persons over 80 years old. When larger than 4 cm, they are termed