Presentation on theme: "The Fusion of Imaging Technologies The Fusion of Imaging Technologies"— Presentation transcript:
1 The Fusion of Imaging Technologies The Fusion of Imaging Technologies INTRODUCINGThe Fusion of Imaging TechnologiesThe Fusion of Imaging Technologies
2 Spectralis is more than resolution … Time Domain OCTSPECTRALIS
3 Spectralis is more than fast … 40 kHz = 100x Faster than time domain OCT
4 Spectralis is more then SD-OCT… Dual laser scanning system for simultaneous imaging:Confocal Scanning Laser Ophthalmoscope (cSLO) with up to 5 imaging modes: IR, FA, ICGA, AF, Red-freeSpectral Domain Optical Coherence Tomograph (SD-OCT)Eye tracking:cSLO recognizes eye movements and guides SD-OCT scanner to followAllows repeat scans at exact same location
5 Spectralis is more than one view … ICGAPolypoidal Lesion
7 Spectralis is knowing location Reference scanCross section scanEYE TRACKINGThe reference image tracks eye movement, and the cross section is moved to matchEye Movement
8 Spectralis Tracks Change Over Time Reference scanCross section scanReal-time alignmentAccurate change measurementEYE TRACKINGCross section scanned at same locationReal-time alignmentExam 1Exam 2
9 Heidelberg Noise Reduction Technology Multiple images are captured at the same location“Noise” is identified as points not common to the set of imagesThe noise is filtered from the final imageImage 1Image 2Heidelberg Noise Reduction Technology produces high resolution, high contrast images with less “speckle”.
11 What’s wrong with the old OCT? Hidden artifact – structure may be different than presentedNot simultaneous – B-Scan may be in different location than reference imageNo eye tracking – Not good for LASIK, not good for diagnostics(S)low resolution – Layers hard to identify for computer algorithms
13 Old OCT Does Not Register Images As the eye moves, so does the scan locationSoftware algorithms reconstruct the dataSoftware assumes the lines are straight and intersecting
14 Increasing Reports of OCT Artifact Study% Artifact/ErrorUCSD: Bartsch (2004)42%Duke: Ray (2005)43%USC: Sadda (2006)92%Bartsch et al. Optical Coherence Tomography: Interpretation Artifacts and New Algorithm. Proc. of SPIE ;Ray et al. Evaluation of image artifact produced by optical coherence tomography of retinal pathology. Am J Ophthalmol Jan;139(1):18-29.Sadda et al. Errors in retinal thickness measurements obtained by optical coherence tomography.Ophthalmology Feb;113(2):
15 Eye Tracking Stops 3D Motion Artifact Without Eye TrackerWith Eye TrackerArtificial ripples due to eye movementsTrue anatomic structure
16 Spectralis Advantages Eye Tracking – Every B-scan is simultaneously locked to a reference imageUp to 6 modes – Multiple perspectives of the anatomy from multiple wavelengths40 kHz scanning – High speed helps overcome eye movement artifact and increases patient comfortTruTrack™ – Image alignment compares reference location at baseline to follow-upHeidelberg Noise Reduction Technology – Overcomes the limits of “resolution”
Your consent to our cookies if you continue to use this website.