By Ihab R. Kamel, Elmar M. Merkle
Physique MR Imaging at 3.0 Tesla is a realistic textual content permitting radiologists to maximize some great benefits of excessive box 3T MR platforms in more than a few physique purposes. It explains the actual ideas of MR imaging utilizing 3T magnets, and the variations among 1.5T and 3T while utilized extracranially. The book's organ-based strategy makes a speciality of optimized innovations, supplying steered protocols for the most owners of 3T MRI structures. All significant thoracic and stomach organs are coated, together with breast, middle, liver, pancreas, the GI tract, kidneys, prostate and feminine pelvic organs. stomach and pelvic MR angiography and MRCP also are mentioned. Protocol optimization, visual appeal of artifacts and novel purposes utilizing 3T are emphasised. Written and edited by way of specialists within the box, physique MR Imaging at 3.0 Tesla courses radiologists in optimizing imaging protocols for 3T MR structures, decreasing artifacts and settling on some great benefits of utilizing 3T in physique purposes.
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Additional info for Body MR Imaging at 3 Tesla (Cambridge Medicine (Hardcover))
This leads to destructive interference in pixels that contain both water and fat, including those pixels at water–fat interfaces, through partial volume effects. This creates the India ink artifact, as is seen with “out-of-phase” images acquired as part of in/out-phase imaging used in abdominal imaging. At 3T, the situation changes, however, because the chemical shift between water and fat doubles to À420 Hz, while the gradient performance is roughly the same, and the passband profiles are identical for a given TR.
Preliminary study results are promising and have supported these proposed advantages. 5 and 3T demonstrated that ADC values are not affected by increasing field strength, but smaller lesions ( 1 cm) were significantly more visible at 3T . A study by Lo et al. 5 and 3T, found similar sensitivities for the three methods (95%, 95%, and 90%, respectively) and that quantitative DWI with ADC thresholds was equivalent in specificity (91%) to DCE-MR imaging . MR spectroscopy MR spectroscopy is another non-contrast-enhanced technique that detects proton-containing metabolites.
9 Arterial phase 3D GRE showing a right pulmonary artery saddle embolus (arrow) with good contrast and resolution. Note that the susceptibility effect from lung is well-controlled using short TR/TE of under 4 ms/2 ms. acquisition of smaller voxels to more accurately isolate a region of interest. The additional SNR also makes MR spectroscopy of phosphorus and carbon more feasible. Prostate MR imaging also benefits from higher SNR achievable at 3T. 10). 11). Advantages of 3T imaging without an endorectal coil also include avoiding anatomical distortion, which precludes use of the images for radiation planning.