CBP CBP Radiographic Analysis 2

Question 1

What does 'anterior weight bearing' as seen on a lateral lumbar radiograph indicate in CBP assessment?

Accepted Answer

The plumb line from L1 falls anterior to the sacral promontory, indicating forward sagittal imbalance

Answer

When the sagittal vertical axis (plumb line from L1 or C7) falls anterior to the sacral promontory, CBP identifies this as anterior weight-bearing, indicating sagittal imbalance.

Question 2

In CBP, how is the 'Harrison posterior tangent' (HPT) angle of a vertebra determined?

Accepted Answer

By drawing a line along the posterior vertebral body surface and measuring its angle to a plumb vertical line

Answer

The HPT angle is the acute angle formed between the line along the posterior vertebral body and a true vertical (plumb) reference line on lateral radiographs.

Question 3

On a full-spine AP radiograph, what does 'lateral vertebral translation' refer to in CBP?

Accepted Answer

The horizontal (left or right) displacement of a vertebral body relative to the vertebra below or to a gravity line

Answer

Lateral vertebral translation is the side-to-side positional shift of a vertebra's centroid relative to the one below, measured in millimeters on the AP radiograph.

Question 4

According to CBP radiographic protocols, why should full-spine radiographs be taken in the standing (weight-bearing) position?

Accepted Answer

Standing films capture the functional, load-bearing spinal posture that reflects true alignment under gravity

Answer

CBP emphasizes weight-bearing films because gravity-loaded posture reveals the true structural and functional alignment that determines clinical outcomes and treatment targets.

Question 5

Which measurement on an AP cervical radiograph helps identify a lateral cervical translation in CBP?

Accepted Answer

The horizontal offset of C7 centroid relative to the C2 centroid or a central gravity line

Answer

Comparing the horizontal positions of vertebral centroids (or C7 relative to C2) on the AP view reveals lateral translation of the cervical column from its ideal midline position.

CBP - Certified Biophysics Chiropractic Practice Test

CBP - Certified Biophysics Chiropractic Practice Test

CBP CBP Radiographic Analysis 2