RAD 245- C-Spine Lateral Projection- Chapter 8- Module 3

Question 1

What line should be parallel with the floor?

Answer 1

AML

Question 2

What line should be perpendicular to the IR?

Answer 2

IPL

Question 3

What plane should be perpendicular to the IR?

Answer 3

MCP perpendicular to the IR

Question 4

Where is the CR centered?

Answer 4

At MCP, Halfway between the EAM and the jugular Notch

Question 5

What is the soft tissue structure that is of interest on the lateral c-spine projection?

Answer 5

Prevertebral Fat Stripe

Question 6

Abnormal widening of the distance between the anterior surface of the cervical vertebrae and the prevertebral fat stripe?

Answer 6

Detection of localization of fractures, masses and inflammation

Question 7

What is evident when the pillars and zygapohphyseal joints on one side of the vertebra move anterior to those on the other side?

Answer 7

Rotation (Hard to determine, but magnification is the side furthest from the IR)

Question 8

What is the line connecting the acanthion and EAM?

Answer 8

AML

Question 9

What is the positioning error when one or both of the mandibular rami are superimposed over the bodies of C1 and/or C2?

Answer 9

If the chin was not adequately elevated

Question 10

What is the positioning error when the lateral projection demonstrates a superoinferior separation between the right and left pillars and zygapophyseal joints of the flexed vertebrae?

Answer 10

If the patient’s head is tilted toward or away from the IR enough to flex the upper cervical column laterally, or the shoulders are not placed on the same plane but are tilted enough to flex the lower cervical column laterally

Question 11

What is the positioning error when there is a separation between the right and left articular pillars and zygapophyseal joints of the upper cervical vertebrae, the inferior cortices of the cranium and the mandibular rami are demonstrated without superimposition, and the posterior arch of C1 remains in profile?

Answer 11

If the head and upper cervical vertebral column were tilted away from the IR

Question 12

What is the positioning error when there is a separation between the right and left articular pillars and zygapophyseal joints of the upper cervical vertebrae, the inferior cortices of the cranium and the mandibular rami are demonstrated without superimposition, and the vertebral foramen of C1 is demonstrated?

Answer 12

If the head was tilted TOWARD the IR

Question 13

What is used to evaluate AP vertebral mobility?

Answer 13

Flexion and Extension Lateral Projections

Question 14

What should be used if the lateral projection is used with the patient in flexion or extension?

Answer 14

An arrow pointing in the direction the neck is moving

Question 15

What is used to determine cervical injury?

Answer 15

The Clivus and the Dens

Question 16

What should be used to best demonstrate C7 on the lateral C-spine projection?

Answer 16

Have the patient hold 5-10 lb weights on each arm to depress the shoulders