What is pleural effusion defined as?

The posterior mediastinum contains the heart and great vessels, esophagus, and trachea.

A patient with congestive heart failure will require which type of adjustment in technical factors for a chest radiograph?

The larger work, the Mahabharata, from which The Bhagavad-Gita comes, is mostly narrated by which character?

Bonus (worth up to 3 points): What connects Confucius and the Bhagavad Gita the most?  What theme or themes in common do you see between the two texts?  Explain your answer with examples from both works.  

The spleen has a hilar area, similar to the liver and the kidneys. ____

The normal splenic index is approximately

The spleen is a retroperitoneal organ. ____

Assign the correct echogenicity: anechoic (A); low level echoes (B); medium echoes (C); and high level echoes (D).low level to medium echoes (F)Left renal cortex ____

Assign the correct echogenicity: anechoic (A); low level echoes (B); medium echoes (C); and high level echoes (D).Splenic artery lumen ____