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Abstract
The Aim Of This Is To Assess The Diagnostic Value Of CT Angiography Of The Pulmonary Arteries In Evaluation Of Clinically Suspect Cases Of Pulmonary Embolism.
SUMMARY AND CONCLUSION
Pulmonary embolism is an important cause of patient morbidity
and mortality. The antemortum diagnosis of PE is difficult to establish
clinically, because the symptoms and signs may are nonspecific and may
be absent (198).
The introduction of spiral computed tomographic pulmonary
angiography (CTPA) has modified the diagnostic approach with regard to
pulmonary embolism and has enabled a noninvasive insight into the
endovascular abnormalities (270).
Several studies have demonstrated that single detector row spiral
CT scans depict thromboemboli in central pulmonary vessels with greater
than 90% sensitivity and specificity, which approaches the results of
pulmonary angiography in the Prospective Investigation Of Pulmonary
Embolism Diagnosis study (PIOPED) (271).
Results of several studies . indicate improvement in performing
adequate single-detector row CT pulmonary angiographic studies and
sub-segmental vessel visualization by using thin (2.0mm) collimation at
0.75 second per revolution, which lead to marked improvement in the
analysis of segmental and sub segmental pulmonary arteries (199).
Within the past few years, multi-detector row spiral CT has been
introduced in the clinical practice with high acquisition speed that can be
used either to quickly cover large volumes, or, when narrow collimation
Role of CT angiography in pulmonary embolism.
M.Sc. Thesis, Radiology Dept., Faculty of Medicine, Zagazig University.