In COVID-19 patients, considerable variation was found in the QCTmass (72.4±120.8 g; range, 0.7-420.7 g) and relative 3D opacity extent on CT (3.2±5.8% of lung area; range, 0.1-19.8%). 2. Chest radiographs in patients under investigation for COVID-19 provided a sensitivity of 25% (5/20) and specificity of 90% (18/20) for COVID-19-related opacities. 3. The QCTmass (p<.001) and the 3D opacity volume on CT (p<.001) significantly affected the visibility of COVID-19-related opacities on radiographs. I n p r e s s Summary Statement Quantitative opacity mass and 3D opacity volume on CT were quantifiable metrics affecting the visibility of COVID-19-related opacities on chest radiographs.

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The biomechanical properties of the GraftMax are comparable to the TightRope. The TightRope, when knotted, shows an improvement both in load to failure and cyclic displacement, though the differences are not significant.

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The original publication of this paper contains mistakes. The first author name "Jin Cheng" is changed to "Cheng Jin ".