Pulmonary embolism is a cause of death and the most common pathological condition involving the lungs of hospitalized patients. Early detection can rise prognosis of survival. In this case presented below, a patient suspected of pulmonary embolism was sent to our department, for assessing the lung perfusion, performing the pulmonary perfusion scintigram with 99mTc-MAA for establishing a diagnosis. Lung imaging is a noninvasive technique without patient discomfort that objectively can depict the distribution of the radiopharmaceutical throughout the lungs. We conclude that multiple non segmental defects with no radiological abnormalities state that the probability of pulmonary embolism is lower than 20%.