By Tommaso Scarabino, Saverio Pollice, Teresa Popolizio
This richly illustrated ebook summarizes the cutting-edge in mind MRI with the 3-Tesla high-field scanner. the purpose is to explain the various merits of utilizing a 3-T excessive magnetic box MR scanner, specifically by way of sensitivity and specificity. the 1st part describes recommendations for traditional MR exam of the mind. complete descriptions are then supplied of complex protocols resembling MR angiography, diffusion-weighted imaging (DWI), perfusion-weighted imaging (PWI), MR spectroscopy, MR tractography, and useful imaging. modifications in diagnostic gains whilst acting those examinations at three T and at 1.5 T are highlighted. moreover, questions of safety in relation to the install and use of a high-field scanner are mentioned. the second one part then describes and illustrates intimately all the major medical purposes of 3-T MRI within the human mind: trauma, stroke, white subject illness, Parkinson’s affliction, Alzheimer’s ailment, mind tumors, inflammatory illness, psychiatric problems, and so on. a last bankruptcy is devoted to the assessment of 7-T MRI inside of either learn and power medical settings. The booklet might be a helpful device for normal radiologists, neuroradiologists, trainees, and technicians.
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This richly illustrated e-book summarizes the state-of-the-art in mind MRI with the 3-Tesla high-field scanner. the purpose is to explain the various merits of utilizing a 3-T excessive magnetic box MR scanner, specially when it comes to sensitivity and specificity. the 1st part describes ideas for traditional MR exam of the mind.
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Extra info for High Field Brain MRI: Use in Clinical Practice
14 High-definition FSE T2 sequence (matrix 512×320, thickness 3 mm, ZIP 1024) acquired with (a–c) and without (d–f) inverted contrast: coronal view. Note the excellent anatomical detail of both hippocampi The semeiological features described for grey nuclei and recent haemorrhage also apply to FLAIR sequences (Figs. 20) [3, 19]. A major drawback of high-field imaging is a larger number of pulsation artefacts, especially in the posterior fossa, probably due to higher blood flow magnetization. The adoption of broader saturation bands does not address the problem because of difficulties with the head coil, but recently developed new coils or new software (parallel imaging) are expected to diminish its impact.
Axial (a) and coronal (b) views a b c Fig. 0 T relaxation times, allowing good contrast and acceptable noise levels (Figs. 18). Indeed, detection of small lesions requires CNR, rather than SNR, optimization, which is obtained using longer TE (120 ms). 0 T entails that a similar inversion time (IT) is required to suppress the fluid signal (around 2250 ms) at both field strengths . g. between white and grey matter) nor those using fat suppression, where T1 must be increased by 25–40 %. 0 T images, requiring great caution in distinguishing them from diseases like amyotrophic lateral sclerosis .
10 High-definition FSE T2 image of the hippocampus b c Fig. 11 High-definition FSE T2 image of the fifth cranial nerve in coronal (a), axial (b) and parasagittal (c) section T. Scarabino et al. 36 b a Fig. 12 (a, b) FSE T2 imaging. The excellent detail of this sequence allows visualization of the perivascular (Virchow-Robin) spaces at the level of the bi-hemispheric cortico-subcortical junction. Axial (a) and coronal (b) views a b c Fig. 0 T relaxation times, allowing good contrast and acceptable noise levels (Figs.