Preferred Label : PhenX - retinal digital photography protocol 111501:-:Pt: Patient:-:PhenX;
LOINC status : TRIAL;
LOINC long common name : PhenX - retinal digital photography protocol 111501;
LOINC short name : Retinal digital photography proto;
LOINC description : Two 45 digital retinal images (Field 1 and 2) will be taken of each eye of the participant
using the Canon Non-Mydriatic Retinal CR6-45NM camera with a digital Canon D60 camera
back (6.3 megapixels per image). Field 1 is centered on the optic disc and Field 2
is centered on the macula, providing photographic documentation of the optic disc,
macula, and substantial portions of the temporal arcades. These photographs may be
graded for retinal microvascular characteristics, including focal arteriolar narrowing,
arterio-venous nicking, retinopathy (e.g., microaneurysms, retinal hemorrhages) and
other conditions. In addition, generalized arteriolar narrowing is quantified using
a computer assisted measure of retinal vascular caliber. Training to take consistent
gradable images is required although training is not extensive and quality of photography
should be monitored throughout the entire study. Systematic grading of the images
with adequate quality control procedures is imperative to minimize grader variability
and to minimize misclassification leading to spurious or erroneous null findings.
This protocol uses the Canon Non-Mydriatic Retinal CR6-45NM camera with a digital
Canon D60 camera back (6.3 megapixels per image). Other ophthalmic imaging cameras
can be used. If other instruments are used, the reproducibility of the measurements
should be comparable to those acquired with this protocol. The Ocular Working Group
recommends cameras that capture images that are 5 mega-pixels or larger for use in
grading and vessel measurement protocols. When other instruments are used to capture
digital retinal images, the manufacturer and model of equipment should be recorded.
These other cameras may require some different steps than are described in this protocol.
Investigators should follow the equipment manufacturer's instructions to ensure quality
control. In addition, this protocol uses EyeQSL,software which is commercially available
through Digital Healthcare Inc. The Ocular Working Group notes that other ophthalmic
imaging packages are available through other vendors that are similar in nature. These
other software packages may require some different steps than are described in this
protocol. Investigators should follow the manufacture's instructions to ensure quality
control. Please be sure to record the manufacturer and model and version of the software
used.;
Origin ID : 62709-1;
UMLS CUI : C3169776;
Has component
- Has method
- Has system
- Has time aspect
- Panel of LOINC codes
- Part of panel
- Semantic type(s)
