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KMID : 1103720130690060487
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Journal of the Korean Society of Radiology
2013 Volume.69 No. 6 p.487 ~ p.494
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Dual-Energy CT for Detection of Traumatic Bone Bruises in the Knee Joint
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Seo Sang-Hyun
Sohn Young-Jun
Lee Chong-Ho
Park Seong-Hoon
Kim Hye-Won
Juhng Seon-Kwan
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Abstract
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Purpose: To evaluate the diagnostic performance of dual-energy computed tomography (DECT) in detecting traumatic bone marrow lesions in patients with acute knee injury.
Materials and Methods: Between August 2011 and June 2012, 22 patients presenting with an acute knee injury, including 4 patients who were referred for bilateral knee trauma, underwent DECT (80 kVp and 140 kVp) and MR imaging. DECT data were postprocessed using a three-dimensional, color-coded, virtual non-calcium technique (VNC). DECT data were graded by 2 blinded independent readers using a four-point system (1 = distinct bone marrow lesion, 2 = less distinct bone marrow lesion, 3 = equivocal, 4 = none) for 6 femoral and tibial regions and 2 patellar regions. Routine MR knee imaging served as the reference standard.
Results: MR images showed bone bruises in 81 of 364 regions. The overall sensitivity, specificity, positive predictive value, and negative predictive value of DECT for bone bruises were 65.4%, 98.2%, 91.4%, and 90.8%, respectively, for Reader 1 and 70.3%, 93.6%, 76.0%, and 91.7%, respectively, for Reader 2. In particular, tibial bone bruises could be found more easily with better sensitivity (80.2%).
Conclusion: The color-coded VNC technique with reconstructions from the DECT maybe helpful in detecting traumatic bone bruises with moderate sensitivity and excellent specificity compared to MR imaging.
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KEYWORD
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Dual Energy Computed Tomography , Virtual Non-Calcium Technique , Knee Trauma , Bone Bruise
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