Match the description on the left, to the correct answer on the right.  Answers are used more than once;  only one correct answer per question.

Aperture diaphragms do not control penumbra well:

The BEST practice to lower occupational exposure from scatter radiation, when using the C-arm, is to have the x-ray tube _______.

During c-arm procedures, standing on the side of the _______ is safest because there is more scatter produced at the entrance surface of the patient.

Which of the following has the advantage of limiting off-focus (stem) radiation?

Much of the radiographic exposure (“density”) that reaches the IR, is created from _______ interactions.

Which kVp selection would result in the most scattered x-rays in the image-forming beam ?

A 42-year-old man presents to the emergency department with complaints of fever, headache, joint pains, and a dry cough for the past six days. Three days ago, he started developing dyspnea. He has a recent medical history of gastroesophageal reflux disease for which he takes famotidine. The patient lives in Ohio and has never traveled outside the country. Vitals show a temperature of 38.1°C (101°F), respirations of 22/min, a pulse of 105/min, and blood pressure of 100/60 mmHg. Physical examination reveals tender nodules on his shins, bilaterally. Pulmonary examination reveals bilateral crackles. Which of the following may be seen on a chest x-ray of this patient?

Which of the following statements best describes the genetic mutation which results in sickle cell anemia?    

A 76-year-old man with a past medical history of hyperlipidemia and diabetes mellitus presents to the emergency room with a 2-hour history of acute, severe, “crushing” left precordial chest pain; it is associated with nausea, vomiting, diaphoresis, and altered mental status. Physical exam is notable for an ashen and cyanotic appearance, hypotension, rapid and weak peripheral pulsations, distant heart sounds, elevated jugular venous distension, and pulmonary crackles. A stat bedside chest x-ray reveals pulmonary vascular congestion and Kerley B lines. What assertion can be made from the diagnostic workup of this patient?