MRI permits the non-invasive study of plant water content, flow, structure, stress response, and other physiological processes, as a multitude of information can be obtained using the method, and portable devices make it possible to take these measurements in situ, in a plant’s natural ...
A radiologist interpreting a head MRI in a patient with suspected stroke dictates: “A flow-void is noted in the basilar artery.” What does this mean? No blood flow is present in the basilar artery. Some flow in the basilar artery may be present, but it is very weak. The basilar...
The numerical mesh is highly refined in order for the subgrid scale models to have negligible contribution, and a systematic, iterative procedure is described to set inlet conditions. The validation of the mean flow data shows excellent agreement between simulation and experiments, which creates ...
The mean age of the patients was 57.5 ± 12.7 years in the PET/CT group (N = 275) and 56.7 ± 12.5 years in the MRI group (N = 244) (p = 0.71). Of the enrolled patients, 86 (31.3%, 86/275) had positive ALNs in their PET/CT reports, which showed...
landmark does the 3d slab need to cover just anterior to? a. Adrenal glands b. Hepatic vein c. Portal vein d. Abdominal aorta 3. .What makes MRI a better choice than DSA for evaluation of a bilateral renal artery stenoses at the orgins of the renal arteries? a. It is a noisier...
Fourteen patients with clinically suspected carious lesions, verified by standardized dental examination including DR and OPT, were imaged with 3D isotropic T2-weighted STIR (short tau inversion recovery) and T1 FFE Black bone sequences. Intensities of dental caries, hard tissue and pulp were ...
Magnetic resonance imaging (MRI) is an inherently slow imaging modality, since it acquires multi-dimensional k-space data through 1-D free induction decay or echo signals. This often limits the use of MRI, especially for high resolution or dynamic imagin
otherwise be compromised by smearing of the bright-blood lumen signal. Two-dimensional (2D) T2-weighted (T2w) spin-echo sequences have inherent blood suppression due to outflow effects at long echo times; however, this mechanism is not compatible with short echo times needed for T1w imaging....
This is due to the increased water content associated with ischemia and demyelination which can be more robustly seen with FLAIR than with T1 or T2-weighted (T2) imaging (Soltanian-Zadeh and Peck, 2001). Intracranial volume (ICV) segmentation, also known as brain extraction or skull stripping...
such global effects on functional connectivity, in each subject, the median correlation of all gray matter voxel signals in each of the four scans was calculated in the minimally preprocessed data, and the mean of these values over all scans was computed (termed global functional connectivity, ...