Table 2 Nomenclature for OCT evaluated features
Nomenclature | Description |
|---|---|
Layered Structure (LS) | Layered structure images define the presence of the normal vessel wall architecture of intima, media and adventitia, which is characterized by a layered architecture varying in contrast to each other and may appear as (1) a thin bright signal intima (not always discernible), (2) a dark signal media, and (3) a bright and heterogeneous signal adventitia is a sample image set showing layered structure. |
Bifurcation (B) | The point at which one arterial lumen communicates with a separate arterial lumen, which is characterized as a luminal space with contiguous borders between communicating lumens is a sample image set showing bifurcation. |
Dissection (D) | A disruption of the vessel wall classified as any or all of the following: intima, media, adventitia, intramural hematoma or intra-stent and characterized by (1) the presence of a false lumen and/or (2) identification of a tissue flap. |
Stent | The presence of an implanted material in the vessel structure, which is characterized by a distinct line followed by an absence of imaging of deeper vessel structures |
Non-Layered Structure (NLS) | The presence of disease in the vessel structure, which is characterized by (1) a loss of a layered structure and/or (2) localized thickening of a layer. This may include calcium, fibrin, lipid, thrombus, or a combination thereof. |
External Elastic Lamina (EEL) | The presence of the border between the media and adventitia, which is characterized as a contrasting border between the two outermost layers of the vessel structure. |