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Use of dual-energy CT to detect and depict bone marrow oedema in rheumatoid arthritis: is it ready to substitute MRI?
  1. Haijun Wu1,
  2. Guangfeng Zhang2,
  3. Xiaoyu Huang1,
  4. Changhong Liang1
  1. 1 Department of Radiology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
  2. 2 Department of Rheumatism, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
  1. Correspondence to Dr Haijun Wu, Department of Radiology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangzhou 510080, China; 15876530875{at}163.com

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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 …

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