A perception experiment to assess the clinical accuracy of various methods of obtaining cardiac phase images.
Five methods of obtaining cardiac phase (and phase-like) images are compared. These are single-harmonic Fourier phase imaging; time-to-minimum using a two-harmonic fit to each dixel; time-to-minimum using four weighted harmonics; composite factorial phase imaging; and individual factorial phase imaging. Polaroid prints of phase images for both gated equilibrium studies (using all methods) and first-pass studies (first and last methods only) were shown to observers who were asked to rate the images according to their confidence of an abnormality presenting. A receiver operating characteristic (ROC) analysis was performed. For gated studies composite factorial phase imaging appears to be best, while all methods are significantly better than single-harmonic Fourier phase imaging. For first-pass studies individual factorial phase imaging appears to be superior to single-harmonic Fourier phase imaging.
Houston
A S
AS
Department of Nuclear Medicine, Royal Naval Hospital, Gosport, Hants, UK.
Craig
A
A
Macleod
M A
MA
D006321:Heart / Q000000981:diagnostic imaging*; D006331:Heart Diseases / Q000000981:diagnostic imaging*; D006801:Humans; D010465:Perception; D012372:ROC Curve; D011877:Radionuclide Imaging / Q000379:methods*