RetmarkerC - FAQ's • Retmarker

RetmarkerC was developed to help doctors manage retinal diseases, in particular Diabetic Retinopathy (DR) and Age-related Macular Degeneration (AMD).

RetmarkerC, where the C stands for Changes (retinal Changes or differences), identifies differences over time in a set of colour fundus photographs. A difference is something that changed between different exams (by means of e.g. lesions, hemorrhages, exudates, or even a receded lesion), but it does not mean necessarily that the patient got better or worse.

RetmarkerC deals with the process of automatically co-registering (overlapping) different images. Each image is compared against the baseline image (the first one in the set of images, considered as reference) to identify the differences. This baseline image is chosen by the user.

No! Doctors perform diagnosis and define treatments.

RetmarkerC provides information to alert to the progression of the disease that might support the doctors’ decisions and allow them to do a better use on their valuable time, focusing in regions of the exams that may need a detailed or even additional examination. RetmarkerC integrates with the practice workflow, allowing the information to be prepared by the technician operating the funds cameras and reducing the doctors’ time to make a decision.

Colour Fundus Photographs are non invasive, thus they are less inconvenient to the patients when compared to exams such as angiographies (FA/ICG). There is a tendency to increase this type of widespread exams for initial screening and monitoring, further complemented by other technologies like OCT.

The most common setting nowadays is Non-Mydriatic cameras but performing pupil dilation to improve quality.

Retmarker solutions were extensively tested with Mydriatic images since this type of images is considered to have higher quality. However it also works with Non-Mydriatic exams but it requires some additional care when choosing the images due to their quality variability.

Retmarker works with retinographies (colour fundus photographs). Both RetmarkerC and RetmarkerDR were fine-tuned to process 45° and 50° images, centered on the retina’s posterior pole, with the optic disc visible (field 2 images).

The images to be analyzed must comply with the following rules:

• be from the same patient;
• be from the same eye;
• share the same angle definition.

For optimum performance the retinographies should have been taken with the same fundus camera device.

Other conditions/protocol (e.g. 30º images) may be experimented but with more caution when analysing the results.

Every fundus camera’s software allows the user to export the exams in several image formats. Retmarker was extensively tested with TIF, JPEG, BMP and PNG images (and you should use one of these), though others may work. The minimum size accepted is 768px x 578px. In our labs we have already versions supporting certain DICOM versions.

If you have problems exporting your images to be used by Retmarker, please refer to the fundus camera supplier’s manual.

If you wish us to support any specific format, please let us know.

We are very interested on allowing you to test our solutions and discuss with you the outcome and relevance of the results, allowing us to constantly improve.

You can contact us directly using the Contacts form available.

Additionally, we and our distributors are present in the most relevant Scientific Congresses and we are more than happy to walk you through the system.

You can look for a local distributor in the Sales & Distribution webpage, or you can contact us directly using the Contacts form available.

If you have any additional doubts, please feel free to contact us using the Contacts form available.