Optimization of combined CT pulmonary angiography with lower extremity CT venography. Academic Article uri icon

Overview

abstract

  • OBJECTIVE: We wanted to determine the time delay for maximum enhancement of the deep venous system of the lower extremities after standard CT pulmonary angiography. SUBJECTS AND METHODS: In 20 patients who had undergone standard CT pulmonary angiography, we measured arterial and venous enhancement at the level of the greater trochanter. These measurements were obtained at 30-sec intervals immediately after completion of CT pulmonary angiography. Ten measurements were obtained in 5 min. Time-density curves were plotted. RESULTS: We found that the median and average peak venous enhancements were 92 and 95 H, respectively. Time to peak enhancement was variable. Because of the broad shape of the venous time-density curve, near peak enhancement could be achieved in most patients at 2 min after CT pulmonary angiography. CONCLUSION: CT of the deep venous system of the lower extremities after standard CT pulmonary angiography, performed with appropriate timing considerations, allows near maximal enhancement of the venous system in most patients without altering the optimum CT pulmonary angiography protocol.

publication date

  • January 1, 2000

Research

keywords

  • Leg
  • Phlebography
  • Pulmonary Artery
  • Tomography, X-Ray Computed

Identity

Scopus Document Identifier

  • 0033987507

Digital Object Identifier (DOI)

  • 10.2214/ajr.174.1.1740067

PubMed ID

  • 10628456

Additional Document Info

volume

  • 174

issue

  • 1