A 4-year-old boy presents with a limp and complaints of hip pain. His parents report that he has been limping for a few days, and the pain seems to be worse in the morning. There is no history of trauma. What is the most appropriate initial diagnostic test?

Which of the following symptoms is most characteristic of growing pains? 

A 3-year-old toddler presents to the clinic with a limp that has been noticeable for the past few days. The parents report no history of trauma. The child has had a recent upper respiratory infection. On examination, there is no fever, and the child appears well. What is the most likely diagnosis?

The portion of contrast that is caused by variations in the anatomy or that is secondary to pathologic changes is called:

Which of the following is true about optimum kVp? SELECT ALL THAT APPLY

No practical amount of mAs can ever compensate for which of the following? 

The ability to produce quality radiographs using a wide range of technical factors is called:

_______ is an environmental issue in which groundwater and surface water can become polluted with sulfuric acid that is produced when sulfur-bearing minerals are exposed to conditions at the Earth’s surface.

Chemically, oil and gas are both examples of ________.

________ is a nonmetal evaporite mineral used in the construction of interior walls in homes and other buildings.