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CHEST RADIOLOGY Table of Contents   
Year : 2006  |  Volume : 16  |  Issue : 2  |  Page : 215-219
Role of CT angiography in pulmonary embolism and its comparative evaluation with conventional pulmonary angiography


From the Radio-Diagnosis Deptt. I.G.M.C. Shimla, India

Correspondence Address:
S Sood
Dyerton Cottage No. 3, Below Talland, Shimla-1
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0971-3026.29095

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OBJECTIVES : The purpose of this study is to assess the role of spiral CT angiography in suspected cases of pulmonary embolism and to do comparative evaluation of CT angiography with conventional pulmonary angiography. MATERIAL AND METHODS : Twenty five patients of suspected pulmonary embolism (PE) underwent spiral CT angiography from the level of arch of aorta to the dome of diaphragm .Scanning was done with collimation of 5mm and an interval of 5mm at 130 mA and 120 kV. 100 cc of contrast containing 300 mg I/ ml, diluted with 60cc of normal saline in ratio 5:3 was injected at a flow rate of 3ml/sec with a scan delay of 20 seconds. Retro - reconstruction was done at 3mm interval. RESULTS : Spiral CTA showed a sensitivity of 80 % and a specificity of 85.7% for the diagnosis of pulmonary embolism. It also provided ancillary findings in the form of parenchymal and mediastinal structural information. CONCLUSION : CTA is an effective alternative to PA in diagnosis of suspected cases of PE. With its non- invasive nature, low cost, over and above high sensitivity and specificity, it may be used as the first line of investigation in the diagnosis of PE.


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