Inclusion Criteria:

- All patients evaluated in the urgent care center and determined to need with CT
pulmonary angiogram to rule out pulmonary embolism based on signs and symptoms such
as dyspnea, pleuritic chest pain, tachycardia, and/or pulse oxygen desaturation will
be included.

Exclusion Criteria:

- Inability to obtain CT pulmonary angiogram secondary to lack of IV access, contrast
allergy or lack of consent.

- CT pulmonary angiogram not done with routine protocol for rule out pulmonary
embolism.

- Less than 21 years of age