title: Radial versus raster spectral-domain optical coherence tomography scan patterns for detection of macular pathology.
abstract: OBJECTIVE
  To compare the 6-line radial vs the 25-line raster spectral-domain optical coherence tomography (SD OCT) acquisition patterns at detecting intraretinal fluid, subretinal fluid, vitreomacular traction, and full-thickness macular hole (MH).
  
  
  METHODS
  Retrospective cross-sectional analysis.
  
  
  METHODS
  Series of 365 eyes with neovascular age-related macular degeneration (AMD), diabetic macular edema (DME), central and branch retinal vein occlusion (CRVO/BRVO), central serous chorioretinopathy, vitreomacular traction, and full-thickness MH. Sequential 6-line radial and 25-line raster scans were evaluated for intraretinal/subretinal fluid and, when applicable, vitreomacular traction and MH.
  
  
  RESULTS
  For neovascular AMD (133 scans), 7 25-line raster scans confirmed subretinal/intraretinal fluid not identified by the 6-line radial (P=.02). For DME (140 scans) and central serous chorioretinopathy (91 scans), 25-line raster confirmed fluid in 4 scans (P=.13) and 1 scan (P=.32), respectively, that was not observed with the 6-line radial. For CRVO (123 scans) and BRVO (126 scans), 25-line raster confirmed fluid on 2 (P=.25) and 4 scans (P=.13), respectively, that was not detected by the 6-line radial. Conversely, for focal vitreomacular traction (70 scans) and full-thickness MH (82 scans), 25-line raster missed focal traction (<1500 μm) and MH in 5 scans (P=.07) and 7 scans (P=.02), respectively, that were identified using the 6-line radial.
  
  
  CONCLUSIONS
  The 6-line radial scan is statistically comparable to the 25-line raster at detecting fluid in DME, BRVO/CRVO, and central serous chorioretinopathy, but not neovascular AMD. Furthermore, it is superior to the 25-line raster pattern at detecting early MH formation, while demonstrating a positive trend in identifying focal vitreomacular traction.
authors.affiliation: Mid Atlantic Retina, The Retina Service of Wills Eye Hospital, Thomas Jefferson University, Philadelphia, Pennsylvania.
authors.forename: Ehsan
authors.initials: E
authors.lastname: Rahimy
authors.affiliation: Mid Atlantic Retina, The Retina Service of Wills Eye Hospital, Thomas Jefferson University, Philadelphia, Pennsylvania.
authors.forename: Nadim
authors.initials: N
authors.lastname: Rayess
authors.affiliation: Mid Atlantic Retina, The Retina Service of Wills Eye Hospital, Thomas Jefferson University, Philadelphia, Pennsylvania.
authors.forename: Joseph I
authors.initials: JI
authors.lastname: Maguire
authors.affiliation: Mid Atlantic Retina, The Retina Service of Wills Eye Hospital, Thomas Jefferson University, Philadelphia, Pennsylvania. Electronic address: jhsu@midatlanticretina.com.
authors.forename: Jason
authors.initials: J
authors.lastname: Hsu
mesh_terms: D000368:Aged; D056833:Central Serous Chorioretinopathy / Q000175:diagnosis*; D003430:Cross-Sectional Studies; D003937:Diagnosis, Differential; D006801:Humans; D008266:Macula Lutea / Q000473:pathology*; D008268:Macular Degeneration / Q000175:diagnosis*; D008269:Macular Edema / Q000175:diagnosis*; D008875:Middle Aged; D015203:Reproducibility of Results; D012167:Retinal Perforations / Q000175:diagnosis*; D012170:Retinal Vein Occlusion / Q000175:diagnosis*; D012189:Retrospective Studies; D041623:Tomography, Optical Coherence / Q000379:methods*