title: Author reply: To PMID 23157521.
authors.forename: I T
authors.initials: IT
authors.lastname: Ling
authors.forename: T K
authors.initials: TK
authors.lastname: Siew
authors.forename: N K
authors.initials: NK
authors.lastname: Loh
authors.forename: G F
authors.initials: GF
authors.lastname: Ryan
mesh_terms: D005260:Female; D006801:Humans; D008297:Male; D064847:Multimodal Imaging / Q000379:methods*; D049268:Positron-Emission Tomography; D011655:Pulmonary Embolism / Q000000981:diagnostic imaging*; D014057:Tomography, X-Ray Computed; D014692:Ventilation-Perfusion Ratio