Ep. 353 MicroCT for PAD: What You Need to Know with Dr. John Rundback

In this episode, host Dr. Sabeen Dhand interviews Dr. John Rundback about analysis of arterial calcifications using microCT.

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AngioDynamics Auryon System

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SHOW NOTES

Dr. Rundback starts by describing the basic differences between microCT and current imaging techniques. MicroCT is a non-destructive imaging method where the x-ray source is stationary but the subject is on a rotating stage. This method can create 3D imaging with a 3 to 5 micron resolution. On the other hand, in traditional CT imaging, the subject is stationary and the x-ray source rotates, which gives a 3 to 5 millimeter resolution.

Then, the episode shifts to a discussion on Dr. Rundback’s recent study, in which he used microCT to evaluate the treatment effect of medial arterial calcification in below knee interventions after Auryon laser atherectomy. For this study, arteries were dissected out of cadavers with cardiac risk factors. These artery segments were then subject to different energies from the Auryon laser. MicroCT was performed before and after the procedure to analyze the degree of calcification. These trials have shown that atherectomy using the Auryon laser could increase compliance of the treated arteries. MicroCT has also helped expand knowledge about different types of calcification and how atherectomy differentially impacts them.

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RESOURCES

Treatment effect of medial arterial calcification in below-knee after Auryon laser atherectomy using micro-CT and histologic evaluation:

https://pubmed.ncbi.nlm.nih.gov/37400346/

Auryon Atherectomy Device:

https://www.angiodynamics.com/product/auryon/