CFO Technology & Digital Tools 3

Question 1

Which DICOM modality tag is most relevant when importing medical imaging data into orthotic CAD software for custom device design?

Accepted Answer

CT (Computed Tomography)

Answer

CT DICOM data provides three-dimensional bone and soft-tissue geometry that CAD software can use to design orthoses conforming precisely to the patient's anatomy.

Question 2

In electronic billing for orthotic services, what is the purpose of the KX modifier when appended to an HCPCS code?

Accepted Answer

Certifies that documentation on file supports medical necessity

Answer

The KX modifier affirms that the documentation in the patient's record meets the applicable coverage criteria and medical necessity requirements for that HCPCS code.

Question 3

A digital gait analysis system reports a prolonged single-limb support time on the right side. What does this finding most likely indicate?

Accepted Answer

Left-side impairment causing the patient to offload it faster

Answer

Prolonged single-limb support on one side typically reflects avoidance of loading the contralateral limb due to pain, weakness, or instability.

Question 4

Which file format is the standard for exchanging 3D mesh data between a foot scanner and orthotic CAD software?

Accepted Answer

STL

Answer

The STL (stereolithography) format stores surface mesh geometry as triangulated polygons, making it the universal exchange format between 3D scanners and CAD/CAM systems.

Question 5

When using an in-shoe pressure measurement system, what does the term 'impulse' represent in the context of plantar pressure data?

Accepted Answer

Pressure integrated over time (force-time integral)

Answer

Impulse is the integral of pressure over time during stance, representing total loading experienced by a foot region — useful for identifying chronic overuse injury risk.

(CFO) Certified Fitter Orthotics Practice Test

(CFO) Certified Fitter Orthotics Practice Test

CFO Technology & Digital Tools 3