POST TEST FOR MODULE 38:  Optical Coherence Tomography, Part 2        Catalog

                                                                   

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1.  The OCT 3 measures retinal thickness by measuring the distance between the nerve fiber layer and the ______.

A. ganglion cell layer

B. retinal pigment epithelium

C. inner plexiform layer

C. vitreous

2.  The saved video image gives you an exact location of the scan placement on the retina.

A. True

B. False

3.  A good quality scan has:

A. good saturation from edge to edge

B. "hot" colors at the NFL and RPE layers

C. no blink artifacts

D. all of the above

4. Which control provides "fine focus" of the OCT 3 scan?

A. z-offset

B. polarization

C. video parameters

D. signal strength

5. Which scan signal strength is generally minimally acceptable:

A. 10

B. >8

C. >5

D. >2

6. Which OCT 3 scan is used for retinal thickness and volume measurements?

A.  FMTS

B. circle scan

C. cross hair scan

D. proportional analysis

7. Each of the 6 scans used for retinal thickness and volume analysis should be examined for:

A.  a minimum level of "cool" coloration

B. correct placement on the retina

C. correct software identification of the RPE and NFL layers

D. correct length

8.  The OCT 3 retinal volume analysis software measures each point within the circle to calculate the volume of the retina.

A. True

B. False

9. Which area within the OCT 3 retinal map volume circle contains the most accurate data?

A. the outer areas of the circle

B. the inner areas of the circle

C. the center point of the circle

D. all areas are equally accurate

10.  A reasonably accurate retinal map analysis will have the standard deviation of the center thickness value within ____ percent of the center thickness value.

A. 90

B. 70

C. 30

D. 10

11.  Which is not a factor that decreases the chances of reproducing a FMT scan?

A. patient movement during scan acquisition

B. lack of registration (the scan cannot be placed in exactly the same place each time)

C. high scan resolution

D. low signal strength

12.  Which factor is most important regarding your ability to reproduce a macular OCT 3 scan?

A. good patient fixation

B. scan length

C. scan resolution

D. scan type

13.  Nerve fiber layer thickness around the optic nerve can be evaluated with the:

A. Fast RNFL thickness scan

B. Fast optic disc scan

C. Fast macular thickness scan

D. Line scan

14.  The OCT 3 measures the nerve fiber layer thickness as the distance between:

A. the NFL and the RPE

B. the top of the NFL layer and the bottom of the NFL layer

C. the top of the RPE layer and the bottom of the RPE layer

D. the optic nerve head and the macula

15.  To increase the accuracy of nerve fiber layer measurements around the optic nerve, the circle scan:

A. can be placed anywhere over the optic nerve

B. can be placed anywhere over the macula

C. should be centered over the optic nerve

D. is automatically placed over the optic nerve