CME OnDemand: Novel Imaging and MIS Techniques in Foot and Ankle Care (2026)-Module 2: MARS protocol in MRI (metal artifact reduction)

Video Transcription

Video Summary

The speaker discusses using metal artifact reduction (MAR) MRI—especially a compressed-sensing slice-encoding protocol (CSCMAC/CMAQ)—to evaluate total ankle arthroplasty. Prior studies showed CSCMAC outperformed high-bandwidth turbo spin echo for visualizing the bone–metal interface and detecting fractures, edema, osteolysis, and tendon pathology. Three cases illustrate value: (1) complex flatfoot/ankle replacement with instability and tendon deficiencies; MAR MRI clarified periprosthetic inflammation and ligament/tendon status to guide reconstruction. (2) Persistent pain with edema suggested infection despite minimal loosening; surgery confirmed infection and revision resolved symptoms. (3) Late hematogenous infection showed fluid tracking to a lateral abscess without obvious loosening, enabling targeted debridement and implant management.

Asset Subtitle

In this lesson Dr.Lew Schon discusses using metal artifact reduction (MAR) MRI—especially a compressed-sensing slice-encoding protocol (CSCMAC/CMAQ)—to evaluate total ankle arthroplasty.

Keywords

metal artifact reduction MRI

CSCMAC/CMAQ compressed-sensing protocol

total ankle arthroplasty evaluation

periprosthetic infection detection

bone–metal interface imaging