Angiography primarily outlines the vessel lumen, whereas intravascular imaging adds cross-sectional information about the lumen, vessel wall, plaque, and implanted devices. This distinction matters when the visible vessel outline does not fully explain disease severity or treatment status. The added structural detail can support more informed diagnosis, treatment planning, and evaluation of vascular interventions.
Intravascular imaging may use a miniature ultrasound transducer or an optical coherence tomography probe. Both are carried through the vessel to generate cross-sectional images, allowing examination of the lumen, vessel wall, plaque, and implanted devices. These options provide structural information that angiography alone may not reveal, supporting assessment of coronary disease and vascular treatments.
Cross-sectional views help characterize atherosclerotic lesions by showing more than a two-dimensional vessel outline. In coronary disease, they can contribute to assessment of lesion severity and composition, while also displaying the relationship between an implanted device and the vessel. This combination links structural observation with decisions about treatment and subsequent evaluation.
During a procedure, a catheter carries either a miniature ultrasound transducer or OCT probe through the vessel. The device generates cross-sectional images that can be reviewed for the lumen, vessel wall, plaque, and implanted devices. This workflow supplies intravascular findings at the time they are needed for diagnosis, planning, or outcome assessment.
For stent placement, imaging can identify incomplete expansion or malapposition, findings that may not be apparent from angiography alone. This information helps clinicians assess the implanted device in relation to the treated vessel rather than relying only on the lumen outline. It therefore supports treatment assessment and evaluation of intervention outcomes.
Clinicians may use these methods when angiography does not provide enough information to characterize coronary disease or judge an implanted device. Their applications span lesion assessment, treatment planning, guidance during stent placement, and evaluation after vascular intervention. The resulting images connect disease characterization with procedural decisions, making the techniques relevant across diagnosis, intervention, and outcome assessment.