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Related Experiment Video

Updated: Jan 8, 2026

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Multidetector computed tomography for acute pulmonary embolism.

Paul D Stein1, Sarah E Fowler, Lawrence R Goodman

  • 1Department of Research, St. Joseph Mercy Oakland Hospital, Pontiac, Mich, USA. steinp@trinity-health.org

The New England Journal of Medicine
|June 2, 2006
PubMed
Summary
This summary is machine-generated.

Multidetector computed tomographic angiography with venous-phase imaging (CTA-CTV) offers higher sensitivity for diagnosing pulmonary embolism than CTA alone. Clinical assessment is crucial for interpreting results, with discordant findings necessitating further testing.

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Area of Science:

  • Radiology
  • Diagnostic Imaging
  • Cardiovascular Imaging

Background:

  • The diagnostic accuracy of multidetector computed tomographic angiography (CTA) for acute pulmonary embolism remains uncertain.
  • Pulmonary embolism (PE) is a critical condition requiring accurate and timely diagnosis.

Purpose of the Study:

  • To evaluate the diagnostic accuracy of multidetector CTA alone and in combination with venous-phase imaging (CTA-CTV) for acute pulmonary embolism.
  • To compare the sensitivity, specificity, and predictive values of CTA and CTA-CTV.

Main Methods:

  • Prospective, multicenter investigation (Prospective Investigation of Pulmonary Embolism Diagnosis II trial).
  • Utilized a composite reference standard for diagnosis confirmation.
  • Assessed CTA and CTA-CTV accuracy, considering image quality and clinical probability.

Main Results:

  • CTA sensitivity was 83% and specificity 96% (excluding inconclusive studies).
  • CTA-CTV sensitivity was 90% and specificity 95%.
  • Predictive values were high with concordant clinical assessment; discordant results were nondiagnostic.

Conclusions:

  • Multidetector CTA-CTV demonstrates superior diagnostic sensitivity for pulmonary embolism compared to CTA alone, with comparable specificity.
  • High predictive value is achieved when imaging results align with clinical assessment.
  • Additional diagnostic testing is essential for cases with discordant clinical probability and imaging findings.