Short echo-time 3D radial gradient-echo MRI using concurrent dephasing and excitation
نویسندگان
چکیده
منابع مشابه
3D pulmonary perfusion MRI with radial ultra-short echo time and spatial-temporal constrained reconstruction
Figure 4. Quantitative evaluation of PBF (ml blood/100ml lung/min), PBV (ml blood/100ml lung) and MTT s in a 23 years old female patient with Factor V Leiden using PCB+ST reconstruction. 3D pulmonary perfusion MRI with radial ultra-short echo time and spatial-temporal constrained reconstruction Grzegorz Bauman, Kevin M Johnson, Laura C Bell, Julia V Velikina, Alexey A Samsonov, Scott K Nagle, a...
متن کاملOptimized 3D ultrashort echo time pulmonary MRI.
PURPOSE To optimize 3D radial ultrashort echo time MRI for high resolution whole-lung imaging. METHODS 3D radial ultrashort echo time was implemented on a 3T scanner to investigate the effects of: (1) limited field-of-view excitation, (2) variable density readouts, and (3) radial oversampling. Improvements in noise performance and spatial resolution were assessed through simulation and phanto...
متن کاملMRI with zero echo time: hard versus sweep pulse excitation.
Zero echo time can be obtained in MRI by performing radiofrequency (RF) excitation as well as acquisition in the presence of a constant gradient applied for purely frequency-encoded, radial centre-out k-space encoding. In this approach, the spatially nonselective excitation must uniformly cover the full frequency bandwidth spanned by the readout gradient. This can be accomplished either by shor...
متن کاملThe Effects of Intravoxel Dephasing and Incomplete Slice Refocusing on Susceptibility Contrast in Gradient-Echo MRI
ture to monitoring intravascular contrast agents or consent) , respectively, that have been acquired in the abvisualizing brain function. In particular, gradient-echo MRI sence and presence of macroscopic magnetic field gradients. sequences sensitized to alterations of cerebral blood oxygenThe images were obtained at 2.0 T (Siemens Magnetom ation (CBO) have resulted in exciting new tools for hi...
متن کاملGradient-echo line scan imaging using 2D-selective RF excitation.
A gradient-echo line scan imaging technique was developed which employs two-dimensional spatially selective radiofrequency (2DRF) pulses for consecutively exciting individual columns of transverse magnetization, i.e., image lines. Although a variety of trajectories are possible for 2DRF excitation, the current implementation involved a blipped-planar trajectory in conjunction with additional sa...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Magnetic Resonance in Medicine
سال: 2011
ISSN: 0740-3194
DOI: 10.1002/mrm.23026