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DICOM PS3.16 2020a - Content Mapping Resource |
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Code Value |
Code Meaning |
Definition |
Notes |
128253 |
OCT-A complex variance |
OCT angiography method based on variations in the |
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complex (amplitude and phase) OCT signal from |
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repeated B-scans at the same location. There are a |
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number of factors that may cause a change in the OCT |
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signalfrequencyrelativetothesignalduetostatictissue |
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background. These factors include, for example, the |
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Doppler effect that induces optical frequency shift and |
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thechangeinbackscatteringduetotheparticlesthatare |
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moving in and out of the OCT-probe volume during |
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imaging. The changes in signal frequency cause the |
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changesinboththeamplitudeandthephaseoftheOCT |
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signal.Comparisonofthecomplex(amplitudeandphase) |
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signal from repeated B-scans at the same location |
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provides an image that has higher contrast in areas of |
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erythrocyte motion. This method is referred to as |
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OCT-based micro-angiography - complex (OMAGC). |
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128254 |
OCT-A speckle variance |
OCT angiography method that analyzes the temporal or |
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spatial statistics of the intensity of speckle from OCT |
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images and identifies blood vessels. |
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128255 |
OCT-A correlation mapping |
OCTangiographymethodthatdifferentiatesflowregions. |
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Static regions usually have high correlation values while |
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flow regions have lower correlation values. |
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128256 |
Doppler OCT-A |
OCTangiographymethodthatutilizestheDopplerphase |
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resolved information to provide the velocity of flow. |
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Sometimes referred to as the phase variance method. |
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128257 |
Retina depth encoded |
ImageusingpseudocolorstoillustratemultipleOPTENF |
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vasculature flow |
images obtained at various depth levels within the retina |
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from the OPT flow volume. |
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128258 RetinadepthencodedstructuralImageusingpseudocolorstoillustratemultipleOPTENF |
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reflectance map |
images obtained at various depth levels within the retina |
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from the OPT structural volume. |
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128259 |
Retina vasculature flow |
Imagethatillustratesthevasculatureflowwithintheentire |
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retina. Generated from the OPT flow volume with pixels |
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approximately from inner limiting membrane (ILM) to |
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photoreceptor inner segment/ellipsoid region (ISe). |
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128260 |
Retina structural reflectance |
ImagethatillustratestheOCTstructuralreflectancewithin |
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map |
the entire retina. Generated from the OPT structural |
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volume with pixels approximately from inner limiting |
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membrane(ILM)tophotoreceptorinnersegment/ellipsoid |
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region (ISe). |
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128261 |
Vitreous vasculature flow |
Image that illustrates the vasculature flow within the |
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vitreous.GeneratedfromtheOPTflowvolumewithpixels |
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approximately from a selected location anterior to ILM, |
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to ILM. This space/potential space is referred clinically |
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as the Vitreo-retinal Interface (VRI). |
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128262 Vitreous structural reflectanceImagethatillustratestheOCTstructuralreflectancewithin |
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map |
the vitreous. Generated from the OPT structural volume |
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with pixels approximately from a selected location that |
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is anterior to ILM, to ILM. This space/potential space is |
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referred clinically as the Vitreo-retinal Interface (VRI). |
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128263 Radial peripapillary vasculatureImage that illustrates the OCT vasculature flow within |
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flow |
theRNFLaroundtheopticdisk.GeneratedfromtheOPT |
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flow volume with pixels approximately from ILM to the |
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outer boundary of the RNFL. |
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