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American Journal of Ophthalmology
Volume 148, Issue 3, Pages 327-476 (September 2009)
Comparison of Retinal Thickness Measurements Between Three-dimensional and Radial Scans on Spectral-Domain Optical Coherence Tomography
Kaori Sayanagi, Sumit Sharma, Peter K. KaiserCorresponding Author Informationemail address
Accepted 6 April 2009. published online 03 June 2009.
Purpose
To compare retinal thickness (RT) measurements between traditional 6 radial line scans and three-dimensional (3D) scans using spectral-domain optical coherence tomography (SD-OCT).
Design
Prospective, consecutive case series.
Methods
Twenty eyes of 17 patients with macular diseases and 8 healthy subjects were scanned using 2 different methods (3D scan and 6 radial line scan) using 2 different SD-OCT devices (Topcon OCT-1000 [Topcon Inc, Paramus, New Jersey, USA] and Canon SPOCT [(Canon/Optopol Inc, Depew, New York, USA]) by an experienced OCT operator. In 16 eyes, the data of TD-OCT were also obtained for comparison. The RT in 9 regions based on Early Treatment Diabetic Retinopathy Study areas were analyzed and compared. Bland-Altman plots were used to evaluate agreement.
Results
In the eyes with macular diseases, there was no significant difference in the RT between 3D and 6 radial line scans except the center subfield (P = .011) on the Topcon OCT-1000, and inner inferior (P = .031) and outer nasal (P = .014) areas on the Canon SPOCT. In the healthy subjects, there was no significant difference between the different scans on both SD-OCT devices. The 95% limit of subjects was 3.2 to 30.6 μm and 16.7 to 28.3 μm in the eye with macular diseases on OCT-1000 and SPOCT, respectively, and 6.7 to 13.6 μm and 10.8 to 32.3 μm in healthy subjects on OCT-1000 and SPOCT, respectively.
Conclusions
Preliminary results suggest the RT obtained by the 2 different scan patterns, 3D scan and 6 radial line scan, did not differ significantly on SD-OCT.
Rechert czuje pismo nosem i wie że w optopolu będzie kiedyś zielono
jakiś patent po drodze
http://www.wipo.int/pctdb/en/ia.jsp?IA=IB2009000260&REF=RSS&DISPLAY=DOCS