[optimal] Re: Cirrus RNFL
- From: Brandi Nicholle <brandi.hardy@xxxxxxxxx>
- To: "optimal@xxxxxxxxxxxxx" <optimal@xxxxxxxxxxxxx>
- Date: Thu, 6 Sep 2012 13:17:06 -0400
Do two scans.
One with the cup completely in the picture- this will give you the c/d ratio,
cup volume, rim area, etc.
One with the cup towards the bottom of the window or even the bottom of the cup
being cut off. This will allow the area used for the RNFL analysis to be
available for acquisition and analysis without losing areas due to being cut
off.
Together these should give you all the information you need.
Hope this helps,
Brandi Deats, CRA OCT-C
Sent from my iPhone
On Sep 6, 2012, at 12:05 PM, copcphotography@xxxxxxxxxxxxxxxxx wrote:
> Hello all.
>
> Need to pick the brains of those using the Zeiss Cirrus OCT please -
> specifically the 'Optic Disc Cube 200x 200'
>
> Last year while training on this unit the company rep couldn't emphasize
> enough to make sure the scanned images of the inferior and superior edge of
> the retina were completely contained within their boxes. Shown to scroll or
> manually move the scan up or down, move the line of site to the edge of the
> dilated iris to level the scan depending on the tilt of the retina - worse
> the higher the myope. In doing this, the bottom of the optic nerve scan may
> be cut off some.
>
> My concern is that by following these directions, and allowing the bottom of
> the ONH to be but off, the average RNFL thickness value is significantly
> lower than what it could be if allowing the superior and inferior edge of the
> retina to 'fold over' and capturing the as much of the bottom of the ON cup
> as possible.
>
> What are your thoughts on this?
> Thanks
>
> Lori Guerette, COA CRA
>
>
>
>
> <OCT RNFL - full view.TIF>
> <OCT RNFL - partial view.TIF>
Other related posts:
