Uusitalo_EU_Ophthalmic_Layout 1 21/01/2010 11:18 Page 14
Imaging and Navigation
Canon CF-1 for Screening, Diagnostics and Documentation
Hannu Uusitalo
Professor and Chairman, Department of Ophthalmology, University of Tampere
Digital fundus photography can be used for the documentation of One of the positive characteristics of the Canon retinal cameras is
retinal findings, for the screening and diagnostics of ocular and the use of EOS Series camera bodies for image capturing. EOS
various systemic diseases or for follow-up after treatment. It is bodies are widely used in many other photographic applications
probably one of the means by which primary healthcare providers and thus are progressively being developed even further. Upgrading
and ophthalmologists will improve their co-operation in the the CF-1 in the future should be easy if higher-resolution or more
forthcoming years. There is consequently a growing need for sensitive capturing devices become available. The CF-1 we tested had
compact, easily transportable digital fundus cameras with high an EOS 40D camera body giving 10.1 megapixel resolution; its
imaging quality that are easy to use. successor 50D has as high as 15.1 megapixel resolution.
Primary healthcare centres will share a fundus camera with other The high sensitivity of the complementary metal oxide semi-
healthcare units or outsource the services to private sector conductor (CMOS) sensor makes the capturing of retinal images
providers. The cameras should therefore be compact, durable and very patient-friendly. The data can be compressed easily. If high-
easy to transport and install. The data interface should be not resolution characteristics or very detailed information images are
only easy to use but also able to be connected to the patient data needed, the images can be saved as RAW format from the camera
system and to the consultation software. body; however, in most applications JPEG compressed images are
sufficient and save database and network capacities.
The camera units used in photographic laboratories of eye clinics
with high-resolution, wide-field optics, various angiographic options In our outpatient photographic unit the experiences with the CF-1
and heavy camera bodies will therefore not be the best option. camera were positive. After a short learning curve, the technician
Even in the outpatient units of eye clinics, where the main focus of captured high-quality images. Some extra practice was needed by
imaging is routine screening or documentation, a compact retinal those who did not have experience with single-eyepiece alignment
camera could be a good choice. In the Canon retinal camera family and focusing. We received very positive comments from patients,
this will mean a decision between the CF-60DSI and a more who appreciated the low amount of glare when capturing their
compact or portable camera, the CF-1. retinal images.
The CF-1 connected to a laptop forms a compact retinal camera Conclusion
unit. The total weight of the camera, including the power unit, is The CF-1 is very compact and easy to transport and operate. Image
26kg. The camera has four photographic modes: colour, red-free, quality is excellent and the low flash intensity was much
cobalt and fluorescein angiographic imaging. The optics work with appreciated by the patients. It can be easily upgraded to newer EOS
50º of angle of view. A digital magnification of x2 and refraction generations with higher resolution. The DICOM compliance makes
corrections are built in. Operator controls for mode and lamp and database connections very simple. n
flash intensity settings are located on the camera. The alignment
and focusing are performed via a single-piece ocular. Working
Hannu Uusitalo is a Professor and Chairman of
distance light dots and split focusing lines help the operators. Those
the Department of Ophthalmology at the University of
who are using their own filters for specific applications, such as Tampere, and Director of the Research and Development
nerve fibre layer photography, would possibly appreciate a built-in
Centre for Ophthalmic Innovations, SILK. Previously, he
was Professor and Chairman of the Department of
slot for extra filters.
Ophthalmology at the University of Kuopio. Professor
Uusitalo is President of the Finnish Glaucoma Society,
The retinal imaging control software is logical and easy to use.
Vice President of the Finnish Association of Eye
Research, former President of the Finnish
During the relatively short test period we did not connect the
Ophthalmological Society and a board member of many scientific organisations. He is
software to our own patient databases. Based on experiences with the author of more than 350 publications, including over 160 peer-reviewed original
other Canon cameras and the DICOM-compliant interface, this
scientific articles as well as reviews, books, educational videos and abstracts.
should not be a problem.
14 © TOUCH BRIEFINGS 2009
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