title: Pulmonary hypertension detection using dynamic and static measurable parameters on CT angiography.
abstract: OBJECTIVE
  The aim was to assess dynamic and static parameters on routine computed tomography pulmonary angiography (CTPA) that may detect pulmonary hypertension (PH).
  
  
  METHODS
  Fifty patients underwent CTPA and echocardiograms. Twenty-six patients had PH, and 24 patients did not have PH. The following parameters were measured on CTPA: density of the pulmonary artery (PA), ratio between the density in the PA and the thoracic aorta (TA), the time between the start of contrast injection to the time the scan trigger density was reached, and PA diameter.
  
  
  RESULTS
  All measured parameters showed significant correlation with PH detected by echocardiogram. The best combination of parameters for detection of PH was contrast density ratio between PA and thoracic aorta of greater than or equal to 1.5 and/or a time to scan trigger of greater than or equal to 8 seconds.
  
  
  CONCLUSIONS
  The parameters measured correlate well with PH by echocardiography. This suggests that CTPA can potentially be used to detect PH.
authors.affiliation: From the *University of Miami, Miller School of Medicine; and †Jackson Memorial Hospital, Miami, FL.
authors.forename: Yoel
authors.initials: Y
authors.lastname: Siegel
authors.forename: Tarun
authors.initials: T
authors.lastname: Mirpuri
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001013:Aorta, Thoracic / Q000000981:diagnostic imaging*; D003287:Contrast Media; D004452:Echocardiography; D005260:Female; D006801:Humans; D006976:Hypertension, Pulmonary / Q000000981:diagnostic imaging*; D008297:Male; D008875:Middle Aged; D011651:Pulmonary Artery / Q000000981:diagnostic imaging*; D011856:Radiographic Image Enhancement / Q000379:methods; D015203:Reproducibility of Results; D014057:Tomography, X-Ray Computed / Q000379:methods*; D014283:Triiodobenzoic Acids
chemical_list: D003287:Contrast Media; D014283:Triiodobenzoic Acids; C054871:ioversol