IJSR International Journal of Scientific Research 2277 - 8179 Indian Society for Health and Advanced Research ijsr-9-12-32711 Original Research Paper Correlation of D-Dimer Level with the Presence and Severity of Pulmonary Embolism on Computed Tomography Pulmonary Angiography Patel Dr. Rachit Saxena Dr. December 2020 9 12 01 02