Radiographic Positioning Excellence: 10th Edition Interactive Test Bank (Chapters 11–20)"

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Radiographic Positioning Excellence:

10th Edition Interactive Test Bank

(Chapters 11–20)"

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Section 1: Foundational Positioning & Anatomy


1. MCQ + 3D Model

Topic: Cervical Spine (Lateral Projection)

Stem:

"Which structure must align with the anterior margin of the mandibular ramus for

a true lateral C-spine?"

a) C1 anterior arch

b) Odontoid process

c) C7 spinous process

d) Hyoid bone

Correct Answer: a) C1 anterior arch

Explanation:

The anterior arch of C1 must align with the mandibular ramus to ensure

proper positioning. This prevents superimposition of the mandible over the

upper cervical vertebrae. Misalignment can obscure critical structures like the

odontoid process.

Added Value:


• 3D Model Link: Rotate a cervical spine model to visualize C1 alignment.

• Reference: Bontrager p. 450.

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2. Trauma Case Study + AR Demo

Topic: Jefferson Fracture

Stem:

"A patient post-MVA has prevertebral swelling on lateral C-spine. Which

projection confirms a Jefferson fracture?"

a) Open-mouth odontoid

b) AP axial (Towne)

c) Oblique cervical

d) Swimmer’s view

Correct Answer: a) Open-mouth odontoid

Explanation:

Jefferson fractures involve burst fractures of the C1 ring. The open-mouth

odontoid view shows lateral displacement of the C1 lateral masses relative to

the dens. Prevertebral swelling on lateral view is a red flag for underlying

fracture.

Added Value:


• AR Simulation: Adjust CR angles to profile C1-C2 in AR.

• Clinical Tip: "Bilateral C1 lateral mass displacement >7 mm indicates

instability (Bontrager p. 465)."




Section 2: Pathology & Advanced Imaging

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3. Pathology-Based MCQ

Topic: Lumbar Disc Herniation

Stem:

*"Which MRI finding correlates with L4-L5 disc herniation compressing the L5

nerve root?"*

a) Posterolateral disc extrusion

b) Central protrusion

c) Facet hypertrophy

d) Ligamentum flavum thickening

Correct Answer: a) Posterolateral disc extrusion

Explanation:

The L5 nerve root exits below the L4-L5 disc. A posterolateral herniation at this

level compresses the traversing L5 root, causing radiculopathy (e.g., sciatica).

Central protrusions compress the cauda equina.

Added Value:


• Image Slider: Compare MRI axial views of herniation vs. normal.

• Key Insight: "L5 compression = pain radiating to the dorsum of the foot

(p. 480)."




4. Fluoroscopy Workflow

Topic: Myelogram Complications