A 75 - year - old lady with severe chronic obstructive pulmonary disease (COPD) presents with acute breathlessness. The chest X - ray shows there is no focal consolidation. She is afebrile, but D - dimers are markedly elevated. Which of the following is best investigation to diagnose this condition ?
The patient has a possible Pulmonary embolus. Gold standard for diagnosis of PEa Pulmonary angiography V/Q is difficult to interpret in patients with cardiorespiratory disease. V/Q is IOC in iodine allergics and pregnancy.
MRI
Ventilation - perfusion (V/Q) scan
High resolution CT thorax
CT pulmonary angiography
Radiology Q Bank