Literature DB >> 35086218

Commentary: Utility of multicolour imaging in identifying tractional membranes over the retina.

Naresh B Kannan1, Sagnik Sen1.   

Abstract

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Year:  2022        PMID: 35086218      PMCID: PMC9024000          DOI: 10.4103/ijo.IJO_2485_21

Source DB:  PubMed          Journal:  Indian J Ophthalmol        ISSN: 0301-4738            Impact factor:   2.969


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Multicolor imaging (MCI) is one of the latest in a series of upgrades to color fundus photography (CFP) in recent times. Fundus photography has been a very important tool for clinical fundus examination, surgical decision, teaching, involving patients in their treatment decision making, and documentation purposes. Standard color photography has been the gold standard for the same for over 50 years, and different platforms, both for examining 30–50 degrees of macula, widefield and ultra-widefield view of the retina, have been developed. Recently, en face multicolor imaging has been available as an additional component of Spectralis SLO-optical coherence tomography (OCT). Spectralis SLO uses three laser wavelengths, namely blue (486 nm), green (518 nm), and near-infrared (815 nm), to scan the retina and create a pseudocolor image by combining the three bands. The monochromatic images are also separately available; blue light delineates the superficial retinal structures, green captures the vascular details better, and the near-infrared laser images the deeper structures such as the inner retina and choroid. Therefore, the pseudocolor combined image resembles the image obtained by Optos wide-angled photography as well. Multiple author groups have studied the delineation patterns of ERM using MCI and compared the ease of visualization and user interpretation compared with standard CFP and Optos Optomap pseudocolor images.[12345] The conventional CFP due to lower contrast and resolution does not show the exact borders and thickness landscapes of epiretinal structures such as membranes (ERM). In comparison, the MCI provides higher contrast by suppressing light scatter and can stratify retinal findings according to variable depths. A significant number of patients with tractional retinal detachments (TRD) have associated vitreous hemorrhage, and we do not have any single modality that can capture fundus image through media opacity. In such situations, the age-old ultrasound B-scan offers us information regarding posterior pole involvement, the location and morphology of tractional membranes, and whether they are focal or broad-based, which aids in preoperative planning. However, in patients in whom the fundus is visible, the SD-OCT B-scan image helps in identifying the pattern of attachment of the membrane to the retina, which aids in surgical planning and postoperative prognostication. There is a consensus now that MCI with its separate reflectance channels can help in the identification of epiretinal structures, both by experienced surgeons and trainee clinicians. The current original study in this IJO issue is particularly novel as the authors have used MCI for the description of diabetic TRDs.[6] The authors noted that apart from better identification of the TRD areas and attachment patterns compared to Optos pseudocolor imaging, there is considerable agreement among observers between MCI and SD-OCT B-scan extent of TRDs. This finding is quite novel in that if in the future, a single retinal photograph could give us adequate information about the extent of membranes and their attachment patterns, then we might be able to obviate the need for an additional OCT scan. The authors also found that the foveal center and thinner preretinal membranes could be appreciated better using the MCI. Another major addition to the MCI platform is a 3D multicolor rendering of the OCT B-scan using the N-phase acquisition mode. The membranes are visible in 3D as green or yellow layers compared to the conventional gray and white appearance in conventional OCT platforms, sort of acting as a digital staining technique. This needs to be looked at in more detail in the future.
  6 in total

1.  VISUALIZATION OF MACULAR PUCKER BY MULTICOLOR SCANNING LASER IMAGING.

Authors:  Ilkay Kilic Muftuoglu; Dirk-Uwe Bartsch; Giulio Barteselli; Raouf Gaber; Joseph Nezgoda; William R Freeman
Journal:  Retina       Date:  2018-02       Impact factor: 4.256

2.  Comparison of MultiColor fundus imaging and colour fundus photography in the evaluation of epiretinal membrane.

Authors:  Ji Hun Song; Ka Young Moon; Seran Jang; YeoRae Moon
Journal:  Acta Ophthalmol       Date:  2018-11-22       Impact factor: 3.761

3.  Scanning laser 'en face' retinal imaging of epiretinal membranes.

Authors:  Lukas Reznicek; Simeon Dabov; Bader Kayat; Raffael Liegl; Anselm Kampik; Michael Ulbig; Marcus Kernt
Journal:  Saudi J Ophthalmol       Date:  2014-03-24

4.  Preoperative imaging optimized for epiretinal membrane surgery.

Authors:  Elise Philippakis; Raphaël Thouvenin; Sarra Gattoussi; Aude Couturier; Ramin Tadayoni
Journal:  Int J Retina Vitreous       Date:  2021-04-13

5.  Multicolor Scanning Laser Ophthalmoscopy Strengthens Surgeons' Preoperative Decision-Making and Intraoperative Performance on Epiretinal Membrane.

Authors:  Zhaotian Zhang; Miaoling Li; Yimeng Sun; Yantao Wei; Shaochong Zhang
Journal:  Transl Vis Sci Technol       Date:  2020-12-18       Impact factor: 3.283

6.  Merits of multicolor imaging for tractional retinal detachment.

Authors:  Santosh Gopi Krishna Gadde; Akhila Sridharan; Nikitha Reddy Gurram; B Poornachandra; Nivedhitha Govindasamy; Chaitra Jayadev
Journal:  Indian J Ophthalmol       Date:  2022-02       Impact factor: 1.848

  6 in total

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