title: Non-invasive ECG-triggered 2D TOF MR angiography of the pelvic and leg arteries in an open 1.0-tesla high-field MRI system in comparison to conventional DSA.
abstract: OBJECTIVE
  A non-contrast-enhanced 2D time-of-flight magnetic resonance angiography (TOF-MRA) protocol was compared with the gold standard of planar digital subtraction angiography (DSA) by calculating correlations of vessel diameters.
  
  
  METHODS
  A total of 1134 vascular diameters in 81 corresponding sites were prospectively measured by TOF-MRA and DSA in seven patients (four women, three men; mean age, 68 years). For a total of 162 vascular segments per patient, 81 Spearman's ρ correlation coefficients were calculated, consolidated to 41 due to consideration of symmetry (right/left), and assessed by correlation quality.
  
  
  RESULTS
  In the 41 consolidated segments, correlations were good, very good, and excellent in 25 segments (n=10>0.5, n=4>0.7, and n=11>0.8), moderate to poor in seven segments (n=4>0.3 and 0<n=3≤0.3), without in two, inverse in three, and nonmeasurable in four segments. Correlations were best for the main arteries above the knee, and these arteries were most consistently visualized.
  
  
  CONCLUSIONS
  The TOF-MRA protocol presented here can be performed in an open 1.0-T MRI system in 60-90 min. Visualization is degraded when the target artery leaves the plane orthogonal to the imaging plane (1) or signal yield is poor due to small caliber (2).
authors: Britta
authors: B
authors: Suttmeyer
authors: Ulf
authors: U
authors: Teichgräber
authors: Andreas
authors: A
authors: Thomas
authors: Hendrik
authors: H
authors: Rathke
authors: Liane
authors: L
authors: Albrecht
authors: Martin
authors: M
authors: Jonczyk
authors: Maryna
authors: M
authors: Verba
authors: Felix
authors: F
authors: Güttler
authors: Bernhard
authors: B
authors: Schnackenburg
authors: Bernd
authors: B
authors: Hamm
authors: Maximilian
authors: M
authors: de Bucourt
mesh_terms: D000368:Aged; D015901:Angiography, Digital Subtraction / Q000379:methods*; D055424:Cardiac-Gated Imaging Techniques / Q000379:methods*; D005260:Female; D006801:Humans; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D007866:Leg / Q000098:blood supply* / Q000000981:diagnostic imaging / Q000473:pathology; D018810:Magnetic Resonance Angiography / Q000379:methods*; D008297:Male; D008875:Middle Aged; D010388:Pelvis / Q000098:blood supply* / Q000000981:diagnostic imaging / Q000473:pathology; D058729:Peripheral Arterial Disease / Q000175:diagnosis*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity