Coronary bifurcation stent morphology in dual-source CT: validation with micro-CT

Area of Science:

• Cardiovascular imaging
• Medical device analysis
• Biomedical engineering

Background:

• Bifurcation stenting is complex, requiring precise evaluation of stent morphology.
• Assessing post-stent placement changes is crucial for patient outcomes.
• In vitro models are essential for validating imaging techniques.

Observation:

• Dual-source CT and micro-CT were used to image coronary artery phantoms with bifurcation stents.
• Morphological changes, including crushed segments and floating struts, were analyzed.
• Specific stenting techniques (Crush, Culotte, T-stenting) were compared.

Findings:

• Dual-source CT accurately visualized bifurcation stent morphology, comparable to micro-CT.
• Crushed stent segments were denser and thicker, located at the main branch side.
• Floating struts were observed in Crush and T-stenting techniques.
• Measurements of stent dimensions showed high correlation and agreement between the two CT methods.

Implications:

• Dual-source CT is a viable method for evaluating in vitro coronary stent morphology.
• This imaging approach may be applicable for assessing patients post-bifurcation stenting.
• Coronary CT angiography could become a standard tool for post-procedural stent evaluation.