W's Flashcards
1
Q
well-defined
A
A margin that can be defined. Distinct margins. The simple test is whether or not you can draw a line around the lesion or border accurately. If you can do this, it is well-defined. Well-defined is often incorrectly described as smooth. Smooth is a shape, while well-defined is a margination description. least dense. Increased tissue density leads to increased x-ray attenuation (increased opacity), which produces whiter areas on a radiograph. (Contrast radiographic density: increased radiographic density = increased blackness on a radiograph).
