Computed Tomography 혈관조영술에서 금속허상감소법의 유용성

Usefulness of Metal Artifact Reduction for Metal Implants in Computed Tomography Angiography

In this study, we identified 26 cases scheduled for lower extremity computed tomography (CT) angiography who had implanted metal devices. These CT exams were performed for evaluation of patients symptoms related with gait disturbance. CT scans were performed on 128-MDCT using our standard parameters. The row image data were reconstructed using two different methods, standard filtered backprojection (FBP) algorithm and the metal artifact reduction for orthopedic implants (O-MAR) algorithm. Images were evaluated with 3-point scales. The difference of image scores for FBP (1.5±0.81) and OMAR (1.92±0.79) was significant (p<0.05). O-MAR reconstruction significantly improved quality of CT angiography for patients with metal implants.