Lung Step 16 Part 4 Pleural Effusion 1. In a supine patient, where is the most accurate location to evaluate for quantification of pleural fluid?*A. Posterior lung regionB. Lateral/Axillary lung regionC. Anterior lung region2. When evaluating pleural effusions, what structure is most important to identify?*A. HeartB. Pleural lineC. Lung lineD. Diaphragm3. Which of the following is not a component of loculated pleural effusion?*A. ComplexB. Occupies non-dependent positionC. SimpleD. Does not shift with changes in position 4. What is the sinusoid sign?*A. Interpleural respiratory variation on M-modeB. Interpleural respiratory variation on B-modeC. Interpleural respiratory variation on Doppler5. What is the curtain sign?*A. Intermittent obstruction of window by inflating air containing lungB. Thickening of line between liver and kidneyC. Effusion pattern that looks like a curtainD. Shadow due to ribs with respiratory variation