A ____________________ is a group of three-digit categories in the ICD-9-CM manual that represent a single disease or a group of closely related conditions.

If an infrared lamp is moved closer to the treatment area by half of the original distance, the intensity of the heat will be increased by

A) 2 B) 3 C) 4 D) 5

For a parietoacanthial sinus projection (Waters method), the

1. patient is positioned upright to demonstrate air-fluid levels within the maxillary sinuses. 2. MML is aligned perpendicular to the IR. 3. central ray is centered to the acanthion. 4. OML is at a 37-degree angle with the central ray. a. 1 and 4 only b. 2 and 3 only c. 1, 2, and 3 only d. 1, 2, 3, and 4