High contrast is defined by:

High contrast is defined by:

• A. Short gray-scale and a few shades of gray
• B. Long gray-scale and many shades of gray
• C. Short gray-scale and many shades of gray
• D. Long gray-scale and a few shades of gray

Answer: (C)

High contrast means a large difference in density between adjacent structures on the image, which gives a short gray-scale with only a few gray levels between black and white. Because there are just a handful of tonal steps, the image shows crisp, stark differences—dense tissues like bone appear very white, while softer tissues appear dark or very light gray, with minimal mid-tones. Think of it as a rapid jump from black to white, not gradual shading. A short gray-scale with many shades would imply many intermediate tones, which is characteristic of low contrast. Conversely, a long gray-scale indicates even more shades and thus even lower contrast. So the description that best matches high contrast is a short gray-scale with only a few shades between black and white.

High contrast means a large difference in density between adjacent structures on the image, which gives a short gray-scale with only a few gray levels between black and white. Because there are just a handful of tonal steps, the image shows crisp, stark differences—dense tissues like bone appear very white, while softer tissues appear dark or very light gray, with minimal mid-tones.

Think of it as a rapid jump from black to white, not gradual shading. A short gray-scale with many shades would imply many intermediate tones, which is characteristic of low contrast. Conversely, a long gray-scale indicates even more shades and thus even lower contrast. So the description that best matches high contrast is a short gray-scale with only a few shades between black and white.