Imaging 2026 Exam Questions
and Answers | Already Graded
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OCT generates structural images of anatomy based on? - ANSWER
✔✔Back-reflected light
How is OCT similar to ultrasound? - ANSWER ✔✔Its similar
concepts, but uses light instead of sound
,T or F: OCT images are true views of the retinal anatomy - ANSWER
✔✔False: they are false views of retinal anatomy
OCT is a map of changes in ___________ and are correlated to known
retinal anatomy - ANSWER ✔✔Refractive indices
OCT has a super-luminescent diode that projects a broadband
__________________ on the retina - ANSWER ✔✔Near-infrared
light beam centered at 820nm
OCTs are measured in? - ANSWER ✔✔Microns : μm
1 mm = 1000 μm
Each A-scan samples thousands of data points over _____ in depth -
ANSWER ✔✔2-3 mm
Large changes in the _______ lead to very distinct demarcation on OCT
- ANSWER ✔✔Index of refraction
Homogeneous structures like the vitreous look like what on an OCT? -
ANSWER ✔✔Reflect little light and will be dark
Optically heterogeneous structures look like what on OCT? -
ANSWER ✔✔Reflect a lot of light and will be relatively bright
, Retinal layers
Acquired Data on an OCT can be represented as? - ANSWER
✔✔Cross-sectional image of the retina as the machine interprets it
Pathology can visibly affect the structural elements of the retinal layers
What does the highest reflectivity appear as? - ANSWER ✔✔Red or
white
Which structures will be red or white? - ANSWER ✔✔Highest
reflectivity: RNFL, RPE, and choriocapillaris
What does the intermediate reflectivity look like? - ANSWER
✔✔Yellow or light grey
Which structures will be yellow or light gray? - ANSWER ✔✔Inner
and outer plexiform layers
What does less reflectivity look like? - ANSWER ✔✔Green or dark
gray
Which structures will be green or dark gray? - ANSWER ✔✔Inner
and outer nuclear layer
What does minimal reflectivity look like? - ANSWER ✔✔Blue or black
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