Which of the following statements are true regarding the rec…

Which of the following statements are true regarding the recognition and treatment of a tension pneumothorax as seen on the chest radiograph?    It requires immediate needle aspiration of the air within the pleural space.  Tracheal deviation will be seen toward the unaffected side of the lung.  It requires immediate insertion of a chest tube.  The hemidiaphragm on the affected side will be pushed downward.  

Which of the following is not used to evaluate the degree of…

Which of the following is not used to evaluate the degree of exposure in the chest radiograph?  Visibility of the vertebrae through the heart shadow  Lucency (dark areas) of the lung fields  Visibility of the peripheral blood vessels  Presence of air bronchogram