Fluorescein Angiography (Retcam 3 System); Theory Of Operation; Using Fluorescein Angiography (Fa) Mode - Clarity RetCam3 User Manual

10
Fluorescein Angiography
(RetCam 3 System)
This chapter covers acquisition of still or video images using the fluorescein angiography
(FA) option. These functions are provided through the Image Capture screen.
•
•
•

Theory of Operation

The FA generates a narrow-band blue excitation light centered at approximately 471
nanometers. The barrier filter inserted in the handpiece has a cutoff wavelength at 510
nanometers or shorter. The FA dye absorbs the blue light and emits green light longer
than 510 nanometers, so the RetCam 3 camera can image the green fluorescence without
being overwhelmed by the blue excitation light.

Using Fluorescein Angiography (FA) Mode

1. Configure FA imaging by either editing a Preset imaging configuration or clicking
Manual configuration and selecting Fluorescein as Image Type. Click
to the Live Imaging screen. Verify the FA mode button indicates FA On
RetCam 3 and RetCam Shuttle User Manual
Theory of Operation on page 135
Using Fluorescein Angiography (FA) Mode on page 135
In FA mode, the timer is controlled separately from the video. For example, when you
pause or stop the video, video capture is interrupted, but the timer continues
uninterrupted. on page 140
NOTE
The internal backup battery never powers the FA module. Therefore, the
system must be plugged into wall power to operate in FA mode.
NOTE
The FA light source is an option for the RetCam 3 system, and your system
might not be equipped with it. Ensure that the FA light source is installed
before scheduling an FA exam.

Fluorescein Angiography (RetCam 3 System)

135
to continue
.
PN 18-000393 Rev. A