Objective: to correlate the findings of 64 MDCT Pulmonary angiography & Well's clinical scoring 
system in cases of pulmonary embolism. Patients and methods: The study was done between 
April 2010, and May 2012, 50 patients with suspected clinical pulmonary embolism (31 women, 
19 men; age range 19-73 years) underwent 64- Multislice CT pulmonary angiography. CT 
angiography was used in examination and evaluation for patients suspected of having PE with 
Correlation with clinical Well's scoring system. The 50 patients were divided into two groups: Group 
I included 40 patients with high risk (where pulmonary embolism is likely & highly suspicious). 
Groups II included 10 patients with low risk (where pulmonary embolism is unlikely). Results: 
Images from “41 of 50" thoracic CT pulmonary angiography examination revealed clots within 
pulmonary arteries, which equals a prevalence of PE of 82%, overall (10 of 41 at pulmonary trunk, 8 
of 41 at segmental pulmonary arteries and 18 of 41 at subsegmental pulmonary arteries, of 24%, 
19.5% and 43.9% respectively, 5 of 41 at multiple central/segmental and segmental/subsegmental 
arteries of 12%). Patients with positive DVT was 34% (17 of 50) & 66% (33 of 50) wasn't having 
DVT prior to the CT Pulmonary angiographic study. Patients with low Well's score probability 
confirmed to have very low incidence of pulmonary embolism, while patients with both medium & 
high Well's score probability having high incidence of pulmonary embolism in CT Pulmonary 
angiography in our study. Conclusion: Correlation of Both 64-MDCT Pulmonary Angiography & 
Clinical Scoring Well's systems showing high relation in-between, considering that group having low 
clinical probability to have PE, MDCT was at the lest positive level, with the other group with high 
clinical possibility to have PE, MDCT findings are at the high level of positive results