Diagnostic performance of dual-energy CT for the detection of bone bruise in the wrist

doi:10.12117/jccmi.2018.07.014

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Journal of China Clinic Medical Imaging ›› 2018, Vol. 29 ›› Issue (7) : 505-509. DOI: 10.12117/jccmi.2018.07.014

REN Qiu-ping, TANG De-qiu, ZHAO Heng, LIU Jin-cai, XIAO Wen-lian, LI Jin-song,#br# LUO Yuan-hong, WU Xiao-dong, QING Wei-peng, LI Xian-mei, XU Juan

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Abstract

Objective: To evaluate the performance of virtual non-calcium images reconstructed from DECT for the diagnosis of bone marrow lesions in patients with acute wrist joint trauma in comparison with MRI. Methods: Thirty-five patients underwent DECT(80 kVp and 140 kVp with tin filter) and MR imaging within 3 day following acute wrist trauma. Presence of traumatic bone bruise on MR and virtual non-calcium images were graded respectively by the readers using a four-point system(3=distinct bone marrow lesion, 0=no lesion), and CT values in virtual non-calcium images were calculated. Results: All bone marrow lesions used MR images as a reference standard. Bone marrow graded 2~3 was considered positive. The sensitivity, specifity, negative predictive value and positive predictive value were 83.33%, 91.30%, 83.33% and 91.30% by analyzing DECT images of the distal ulnar radius bone marrow. In non-calcium images, the grades of bone marrow lesion gradually increased from 0 to 3(P<0.001) with increasing corresponding CT values. There were significant differences in CT values between the positive and negative regions(P<0.001). CT numbers for distal ulna and radius bone marrow lesions were analyzed by ROC, revealing areas under the receiver operating characteristic curve greater than 0.5. Conclusion: Compared with MR images, bone bruises of the wrist joint can be diagnosed on virtual non-calcium images reconstructed from DECT with high specificity and excellent negative predictive value. DECT may be a potential alternative method to MRI contraindications.

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Wrist injuries / Tomography, X-ray computed / Magnetic resonance imaging

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REN Qiu-ping, TANG De-qiu, ZHAO Heng, LIU Jin-cai, XIAO Wen-lian, LI Jin-song,. Diagnostic performance of dual-energy CT for the detection of bone bruise in the wrist[J]. Journal of China Clinic Medical Imaging. 2018, 29(7): 505-509 https://doi.org/10.12117/jccmi.2018.07.014

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