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Previous Volume 355:955-956 August 31, 2006 Number 9 Next

	Since this article has no abstract, we have provided an extract of the first 100 words of the full text and any section headings.

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To the Editor: In an important recent study, the Prospective Investigation of Pulmonary Embolism Diagnosis II (PIOPED II) trial, Stein et al. (June 1 issue)¹ found that multidetector computed tomographic angiography (CTA) had excellent specificity and good sensitivity for the detection of pulmonary embolism. The PIOPED II trial also replicates the findings of the PIOPED I trial² (which used ventilation–perfusion scanning as the imaging technique) that the a priori — that is, before imaging — clinical suspicion of whether or not a patient has a pulmonary embolism is crucial in making the diagnosis. But one issue I have not seen . . . [Full Text of this Article]

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