POST TEST FOR MODULE 48:  Spectral Domain Optical Coherence Tomography   Catalog

                                                                   

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Section 1

1. The resolution of time domain OCT is about ___  times greater than the resolution of ophthalmic ultrasound.

A. 2

B. 5

C. 10

D. 20

2. A motion artifact in an OCT scan appears as:

A. waviness in the scan image

B. a blank area in the scan image

C. few hot colors in the scan image

D. a red line through the scan image

3. The OCT measures retinal thickness by measuring the distance between which two retinal layers?

A. RNFL and RPE

B. RNFL and Ganglion

C. RPE and Ganglion

D. RPE and Interneuclear

4. What is interpolation?

A. Interpolation is a method used to convert numerical data to a graphic image.

B. Interpolation is a method of constructing new data points from a discrete set of known data.

C. Interpolation is a method used to arrive at a diagnosis from a set of measurements.

D. Interpolation is a method used to create a 3-D image from two dimensional data points.

5. What is the term used to describe the process of overlaying two images by matching common points in the two images?

A. interpolation

B. interjection

C. regurgitation

C. registration

Section 2

6. Which statement is not true of spectral domain OCT technology?

A. An interferometer is used to measure distances.

B. The reference mirror moves.

C. A spectrometer is employed.

D. Resolution is improved compared to time domain technology.

7. Capturing a block of multiple OCT scans is called:

A. raster scanning

B. block scanning

C. line scanning

D. topography

8. Creating a contour map of the retinal surface from OCT scans is called:

A. raster scanning

B. block scanning

C. line scanning

D. topography

9. The Zeiss OCT 3 uses ____ scans to produce a retinal thickness map.  The Opko SD-OCT uses ____ scans to produce a retinal thickness map.

A. 100, 200

B. 6, 30

C. 6, 200

D. 30, 30,000

10. The spectral domain OCT has totally eliminated RNFL layer identification as an error source when performing RNFL scans.

A. True

B. False

11. Which statement is not true of a microperimeter?

A. The microperimeter is a visual field testing device

B. The microperimeter projects the stimulus directly onto the retina.

C. The microperimeter tracks eye movements.

D. The microperimeter has the same background illumination as the Humphrey Field Analyzer.

Section 3

12. For a given number of scans, increasing scanning speed will decrease the quality of each scan.

A. true

B. false

13. Which retinal abnormality will not show up on a retinal topography map based upon retinal thickness measurements?

A. macular drusen

B. diabetic macular edema

C. pigment epithelial detachment

D. cystoid macular edema

14. Which scan will give you the highest resolution in an individual scan?

A. line scan

B. raster scan

C. topography scan

D. RNFL scan

15. When scanning, what is a "Z" axis adjustment?

A. an up and down adjustment

B. a forward and backward adjustment

C. a left and right adjustment

D. a combination up/down and left/right adjustment