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MRI can visualise and depict bone marrow oedema, which is known to be a strong independent predictor for radiographic progression in patients with rheumatoid arthritis (RA).1 2 Recent advances in dual-energy CT have enabled the direct visualisation of traumatic bone marrow oedema with high sensitivity and specificity through implementation of virtual non-calcium (VNCa) images.3–7
We have recently read Jans and colleagues’ letter8 entitled, ‘Dual-energy CT: a new imaging modality for bone marrow edema in rheumatoid arthritis,’ published online this June, which mentioned the use of dual-energy CT to visualise bone marrow oedema of the hand and wrist in patients with active RA and deduced that the colour-coded VNCa images could differentiate normal bone marrow from bone marrow oedema and corresponded well to bone …
Handling editor Josef S Smolen
Contributors HJW and CHL equally contributed to this manuscript. All authors drafted and approved the letter.
Competing interests None declared.
Patient consent Not required.
Provenance and peer review Not commissioned; internally peer reviewed.
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