CBP Radiographic Analysis Flashcards
6 cards from real CBP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 CBP Radiographic Analysis flashcards as text
What does 'anterior weight bearing' as seen on a lateral lumbar radiograph indicate in CBP assessment?
Answer: The plumb line from L1 falls anterior to the sacral promontory, indicating forward sagittal imbalance
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.
In CBP, how is the 'Harrison posterior tangent' (HPT) angle of a vertebra determined?
Answer: By drawing a line along the posterior vertebral body surface and measuring its angle to a plumb vertical line
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.
On a full-spine AP radiograph, what does 'lateral vertebral translation' refer to in CBP?
Answer: The horizontal (left or right) displacement of a vertebral body relative to the vertebra below or to a gravity line
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.
According to CBP radiographic protocols, why should full-spine radiographs be taken in the standing (weight-bearing) position?
Answer: Standing films capture the functional, load-bearing spinal posture that reflects true alignment under gravity
CBP emphasizes weight-bearing films because gravity-loaded posture reveals the true structural and functional alignment that determines clinical outcomes and treatment targets.
Which measurement on an AP cervical radiograph helps identify a lateral cervical translation in CBP?
Answer: The horizontal offset of C7 centroid relative to the C2 centroid or a central gravity line
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.
In CBP outcome studies, which radiographic parameter is most commonly used to verify structural correction after treatment?
Answer: Change in Cobb angle or posterior tangent angle of the treated spinal region
CBP outcome research primarily uses before-and-after angular measurements (Cobb or posterior tangent angles) to document and verify structural spinal correction.