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Imaging pathway taken by 168 patients investigated for suspected venous thromboembolism (VTE). CTPA, CT pulmonary angiography; DVT, deep venous thrombosis; NFI, no further imaging performed; PE, pulmonary embolism; Q scan, perfusion scan; V scan, ventilation scan; VQ scan, ventilation/perfusion scan; * Suboptimal contrast opacification, but no evidence of central PE; ** singular subsegmental mismatched perfusion defect.
