الفهرس 
Introduction and aim of the work
Gross lung anatomyOnly 14 pages are availabe for public view
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Abstract
Pulmonary embolism (PE) is a common and potentially fatal disorder if not diagnosed and treated as early as possible. It is the third cause of mortality by cardiovascular disease after myocardial infarction and stroke. This fatal disease is caused by partial or complete obstruction of the pulmonary arterial bed by a thrombus formed in the systemic veins. Diagnosis of pulmonary embolism remains a major problem because of its variable and non-specific symptoms. So, radiological imaging is required to establish the diagnosis. The invention of Multi-detector computed tomography angiography (MDCTA) leads to big evolution in the diagnosis of pulmonary embolism. By reviewing the literature, it has been found that most of the studies considered MDCTA of pulmonary arteries as the examination of choice in the diagnosis of PE and has replaced other investigations as scintigraphy and conventional angiography in many hospitals. Diagnosis of pulmonary embolism with MDCTA is based on direct visualization of the intraluminal thrombi as hypoattenuating filling defects inside the enhanced lumen of pulmonary arteries.This study included 20 cases suspected clinically to have pulmonary embolism subjected to dynamic post contrast Multi-detector CT examination. They were 11 female and 9 males.It was found that their ages ranged from 37-71 years with mean age 57.15 years old. We observed that the most commonly affected age among the studied cases was between 50-60 years old (40%).