Zobrazeno 1 - 10
of 22
pro vyhledávání: '"D G, Nishimura"'
Publikováno v:
Magnetic resonance in medicine. 45(3)
A multislice real-time imaging technique is described which can provide continuous visualization of the entire left ventricle under resting and stress conditions. Three dynamically adjustable slices containing apical, mid, and base short axis views a
Publikováno v:
Magnetic resonance in medicine. 45(3)
A new spiral imaging technique incorporates the acquisition of a field map into imaging interleaves. Variable density spiral trajectories are designed to oversample the central region of k-space, and interleaves are acquired at two different echo tim
Autor:
G T, Luk-Pat, D G, Nishimura
Publikováno v:
Magnetic resonance in medicine. 45(2)
Off-resonant spins, produced by chemical shift, tissue-susceptibility differences, or main-field inhomogeneity, can cause blurring or shifts, severely compromising the diagnostic value of magnetic resonance images. To mitigate these off-resonance eff
Publikováno v:
Magnetic resonance in medicine. 43(6)
A connectivity algorithm combined with a new gray-level morphological filter dramatically improves the segmentation of tortuous coronary arteries from 3D MRI. Small coronary arteries are segmented from the larger ventricles with a new filter. These b
Publikováno v:
Magnetic resonance in medicine. 43(3)
The quality of spiral images depends on the accuracy of the k-space sampling locations. Although newer gradient systems can provide more accurate gradient waveforms, the sampling positions can be significantly distorted by timing misregistration betw
Publikováno v:
Magnetic resonance in medicine. 43(3)
In many applications of dynamic MR imaging, only a portion of the field-of-view (FOV) exhibits considerable variations in time. In such cases, a prior knowledge of the static part of the image allows a partial-FOV reconstruction of the dynamic sectio
Publikováno v:
Magnetic resonance in medicine. 43(2)
A real-time interactive color flow MRI system capable of rapidly visualizing cardiac and vascular flow is described. Interleaved spiral phase contrast datasets are acquired continuously, while real-time gridding and phase differencing is used to comp
Autor:
K S, Nayak, D G, Nishimura
Publikováno v:
Magnetic resonance in medicine. 43(1)
A new projection reconstruction technique utilizes the oversampling of low spatial frequencies to estimate and correct for off-resonance effects. Interleaved spokes are acquired at one of two different echo times. From separated early-TE and late-TE
Publikováno v:
Magnetic resonance in medicine. 43(1)
A new, fast, spectrally selective steady-state free precession (SSFP) imaging method is presented. Combining k-space data from SSFP sequences with certain phase schedules of radiofrequency excitation pulses permits manipulation of the spectral select
Publikováno v:
Magnetic resonance in medicine. 42(5)
A new fast, spectrally selective imaging method called fluctuating equilibrium magnetic resonance is presented. With all gradients refocused over a repetition interval, certain phase schedules of radiofrequency excitation pulses produce an equilibriu