Situation: A patient is in the intensive care unit with multiple injuries. The attending physician is concerned about a pleural effusion in the left lung. The patient had surgery recently and cannot stand. Which position/projection would be best to rule out the pleural effusion?

What happens if blood flow is sampled in the center of a vessel exhibiting  parabolic flow?

Situation: A patient enters the ED with a possible pneumothorax in the left lung. Because of trauma, the patient cannot stand or sit erect. Which of the following positions would best demonstrate this condition?

What is the recommended kV range for upper airway projections (analog and digital imaging)?

Normally, what happens to the venous flow in the legs during inspiration?

Which of the following technical facotrs is most ideal for adult chest radiography?

The central ray (CR) for an anteroposterior (AP) supine, adult chest projection should be centered: 

Situation: An ambulatory patient comes to radiology with a clinical history of possible pneumonia. The patient complains of pain in the center of her chest. What positioning routine should be performed on this patient?

Situation: A PA chest radiograph reveals that the left sternoclavicular joint is closer to the spine than the right joint. What specific positioning error has been committed?

Situation: A patient comes to radiology for a routine chest study. On the PA projection, the radiologist sees a possible calcification near a rib, but she cannot tell whether the calcification is in the lung or on the rib. What additional projections would assist with the diagnosis?