Can the “pine-needle sign” on computed tomography be used to differentiate pulmonary arteriovenous malformation from its mimics? Analysis based on dynamic contrast-enhanced chest computed tomography in adults

•The angle between dilated vessels is an excellent morphological index for pAVM.•Vessels in pAVM have a narrow angle resembling a pair of pine-needle leaves.•The pine-needle sign effectively differentiates pAVM from its mimics.•pAVM may be diagnosed by the pine-needle sign even without contrast enha...

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