For a long time, OCT Angiography users are under the impression that the wider area, the fewer details. It is partially correct because we used to compromise the line position numbers in exchange of faster acquisition. The image quality was sacrificed by doing so. Can you believe there is no such concern when it comes to TowardPi BMizar? even if it is a 120° single captured OCTA image!

(Fig1) is a CNV eye, outer retina slab, from TowardPi 24mm OCTA. New vessels are so vivid that can be appreciated in each branch of this neovascularization. In order to make comparison, we took two more scans individually, 12mm and 6mm (Fig2). You can notice that there’s almost no difference between them in matter of image quality.

Please note that the 120° OCTA is of the size 13 times bigger than 6mm in area! But thanks to extremely fast speed at 400,000Hz, we succeed in keeping 15.6um line interval for the scan, which is equivalent to HD standard from traditional small sizes. One single capture consists of 10 billion voxels, is completed in only 15 seconds.

In addition, with the high standard of image detail, TowardPi provides blood flow quantification for all sizes. CNV area in this case for example, highlight the pixels from vessels then sum up to flow area for evaluation and follow-up (Fig3).

Of course, all OCTA scans can be switched to more slabs, including our exclusive choroid vessel mode which TowardPi is very proud of (Fig4). B-scan mode (Fig5) presents traditional cross section slices of retina and choroid, but much wider (24mm) and deeper (6mm).

Some might say, “this wide OCTA is useful for diseases as DR, RVO, RAO, etc. But we don’t need such wide scan for CNV.” Think about it, you won’t know what lesion it is, until you see the result. Which means you don’t need extra exams if it is a wide field OCTA in High Definition already!

“From learning to leading, a strong rise of new generation technology.”Huge thanks to the endorsement and image courtesy of Prof. ZhiQing Li.

Illustration: Dr. Jian Zhou (TowardPi Medical)