MRI: Magnet Strength
In the absence of reliable evidence, it is the opinion of the work group that a magnet of at least 1.5 Tesla should be used when imaging musculoskeletal neoplasms.

Rationale
No investigations directly compare the diagnostic performance of different magnet strengths on the same tumors, limiting the statements that can be made regarding whether increasing strength of the magnet improves diagnostic performance. However, strong evidence including several high and moderate quality investigations (Henninger, Crombe, Thornhill, Daniel, and Negendank) have demonstrated a strong sensitivity and specificity for differentiating between benign and malignant etiologies when imaging the tumor with a 1.5T magnet strength (1.5T magnets are widely available and are known to provide good quality images), when compared with the gold standard of histologic diagnosis. 1.5T was the most commonly used magnet strength in the literature, however, these several moderate strength studies demonstrated less accurate diagnostic results for 1.5T magnet strength compared to stronger magnets (Chen, Kalayanarooj).

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