A cephalic central ray angulation is required on an AP knee image when the: 1. examination is performed with the patient in an upright position 2. patient’s anterior tibial margin is distal to the posterior tibial margin 3. the patient’s ASIS-to-imaging table measurement is 22 cm 4. the knee is flexed and a curved IR is used

A reference histogram that evolves by averaging it with the previous 50 procedures is called a(n) _________ histogram:

For an AP atlas and axis image: 1.the mandibular angles and the shoulders are positioned at equal distances from the IR2.the acanthiomeatal line is aligned parallel with the IR3.a 5-degree cephalad angulation is used4.an imaginary line connecting the upper occlusal plane and posterior occiput’s inferior edge is aligned perpendicular to the IR

If quantum mottle appears on the digital image, what should be done?

What radiology descriptor relates to the efficiency of the detector to convert x-ray energy into a radiographic image?

A recommended practice is to decrease the SID to less than 40 in (100 cm) for the oblique sternum to increase the magnification and resultant unsharpness of overlying ribs.

The increased contrast resolution of digital imaging systems allows demonstration of tissue with an inherent subject contrast as low as:

Exposure factors are 75 kV, 100 mAs, 48-in. SID, 3.0 cm OID, 1.0 mm focal spot size (FSS), and a 12:1 grid ratio. Which set of technical factors would maintain overall receptor exposure and lower patient dose?

The recommended dose limit for the pregnant technologist is _____ mrem/month.

For a lateral (Twining) cervicothoracic image, the: 1.patient is placed in a lateral position2.arm placed adjacent to the imaging table is elevated3.arm placed farther from the imaging table is positioned at a 90-degree angle with the body4.midsagittal plane is aligned parallel with the IR