Imaging signs for preoperative diagnosis of dural ossification in patients with thoracic ossification of the ligamentum flavum: a blind, randomized diagnostic accuracy study.

"Conflicts of Interest: All authors have completed the ICMJE uniform disclosure form (available at https://qims.amegroups.com/article/view/10.21037/qims-23-634/coif). The authors have no conflict of interest to declare."

"Funding: This work was supported by the National Natural Science Foundation of China ( Nos. 82072479, 81772381, 81874031 ), Peking University Third Hospital Talent Incubation Fund ( No. Y77477-03 ), and China Postdoctoral Science Foundation ( No. 2022M720293 )."

"The present study was approved by the Ethics Committee of Peking University Third Hospital (IRB00006761-M2019494) and conducted according to the principles of the Declaration of Helsinki (as revised in 2013). Written informed consent was provided by all participants. The protocol has been published and registered on the Chinese Clinical Trials website (ChiCTR2000030380) (). Ethical Statement: The authors are accountable for all aspects of the work in ensuring that questions related to the accuracy or integrity of any part of the work are appropriately investigated and resolved. The present study was approved by the Ethics Committee of Peking University Third Hospital and conducted according to the principles of the Declaration of Helsinki (as revised in 2013). The protocol has been registered on the Clinical Trials website (ChiCTR2000030380). Written informed consent was provided by all participants."