Image Production Factors

Question 1

The first phosphor used in the construction of an intensifying screen was:

Answer 1

Calcium tungstate

Question 2

The ability of X-Rays to cause certain materials to glow in the dark is:

Answer 2

Fluorescent effect

Question 3

What factors prohibits secondary radiation from reaching the film?

Answer 3

Compression, beam limiting, increased object film distance, and external filters

Question 4

A principal problem in using a very high ratio grid is:

Answer 4

That the proper centering of tube to grid is more difficult

Question 5

A cone sufficient to cover a 14” x 17” film is used to produce a satisfactory radiograph. If a 4” extension cone is used to cone down on the gallbladder, with no other factor changes, the resulting radiograph will exhibit:

Answer 5

Less density

Question 6

If a pair of intensifying screens have become stained because of age, the speed of those screens:

Answer 6

Increases

Question 7

If a dye is added to the intensifying screen crystal layer, aside from an increase in detail, one could expect:

Answer 7

A decrease in screen speed

Question 8

By using the proper film combination and optimal kilovoltage, one can obtain a balanced contrast film. One of the contraindications for using slow screens and regular speed film is:

Answer 8

Increased radiation

Question 9

The contrast of an abdominal radiograph utilizing portable X-Ray equipment is improved by:

Answer 9

Employing a grid