CT Value of Pulmonary Embolism.pdf

1、Pulmonary embolism is very fatal disease, a delay in immediate diagnosing and treatment will leads to increase in mortality. From the beginning many diagnostic procedure and biological parameters like Plain film examinat

2、ion, Lung Scintigraphy Catheter pulmonary angiography D-Dimer and N-pro BNP were introduced, each one has its own limitations in diagnosing the accuracy of the pulmonary embolism. The introduction Computer tomography has

3、 improved the quality of diagnosing PE and becamethe first line of choice in diagnosing the disease. MDCTA has shown a great potential value in diagnosing of PE. CT Angiography helps in detection of sub segmental PE. Apa

4、rt from PE, CTA has an advantage in alternative diagnosing of other thoracic diseases, thus increasing the sensitivity and specificity of PE. Some researches have shown the use specific image considerations by combined o

5、ne or two image modalities are using Imaging and biological parameters. Those studies shown increased sensitivity and specificity of the study. The drawback of the studies are they cannot be performed on all patients. Th

6、e main limitations of conventional CT and CTA are radiation dose exposure to the patient and movement artifacts caused during CT procedures. Recent development of Dual Energy CT (DECT) has added an additional to favorabl

7、e progress to the CTA and overcome the diagnostic pitfalls of conventional CTA. The combined Pulmonary CTA and lung perfusion technique in DECT could assist in the detection of pulmonary emboli that are not evident by co

8、nventional MDCT pulmonary angiography. Radiational dose have become the limitation of DECT. Several studies have shown the overcoming procedures to reduce the radiation dose. But, when compared with diagnostic specificit