A type of shielding that is suspended from the tube head that ...

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A type of shielding that is suspended from the tube head that casts a shadow over the reproductive area is:
 
 flat shield
  collimation
  shaped contact shield
  shadow shield

Question 2

Which of the following would be a negative contrast agent with a low atomic number administered to a patient?
 
 barium
  radiopaque contrast
  iodinated contrast
  radiolucent contrast

[Cnarkel]

Answer to Question 1

shadow shield

Rationale: Shadow shields have a piece of leaded material attached to an arm that can be attached to the tube head. The material will cast a shadow as adjusted to the correct anatomic location.

Answer to Question 2

radiolucent contrast

Rationale: A radiolucent contrast is a negative agent that has a low atomic number. Radiolucent contrast agents may be introduced in certain exams to create a double contrast effect on the image. A radiolucent contrast will appear dark on the radiograph.