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Overcoming metallic artefacts from orthopaedic wrist volar plating on a low-field MRI scanner
Alessandro Stecco1, Roberto Arioli2, Francesco Buemi2
1Radiology Institute, Services Diagnosis and Therapies Department, Maggiore della Carità Hospital, University of Eastern Piedmont - UPO University, Corso Mazzini 18, 28100, Novara, Italy. a.stecco@libero.it.
Purpose:
To quantitatively compare the artefact reduction between standard and metallic artefact reduction (MAR) fast spin echo (FSE) T2 sequences in a low-field magnetic resonance imaging (MRI) scanner (0.3 T) in patients with titanium volar wrist plating.
Materials And Methods:
Sixteen patients with fractures of the distal radius, treated with titanium volar wrist plating and screws, were examined using a dedicated 0.3 T MRI scanner. Coronal standard FSE T2, FSE T2 high bandwidth (HiBW) and FSE T2 view angle tilting (VAT) sequences were performed. Metallic artefact volume, consisting of both "black" and "bright" artefacts, was calculated for each sequence. Quantitative differences were compared using repeated measures ANOVA test (P < 0.05).
Results:
FSE T2 HiBW and FSE T2 VAT showed a significant reduction in artefact volume compared to the standard sequence. Differences between the artefact volume of the standard FSE T2, HiBW and VAT sequences were statistically significant for both the "black" and "bright" artefacts (P < 0.0001). Differences between the 1.5 HiBW and VAT sequences were statistically significant (black P < 0.0001, bright P < 0.0302).
Conclusions:
MAR sequences significantly reduced metallic artefacts in vivo using a 0.3 T MRI scanner.
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