14 Gadolinium-diethylenetriamine pentaacetic acid enhancement has more effect on T1 relaxation, which is determined by the characteristics of the magnetic field, than on T2 relaxation, which depends on interactions between the hydrogen nuclei and other macromolecules.14 The Gd-DTPA–enhanced MRI can ...
A focus of abnormal T2/FLAIR signal hyperintensity in the right periventricular white matter, with differential remote sequelae of periventricular leukomalacia, migraines, posttraumatic, or less likely inflammatory causes. Flow voids at the skull base are preserved. There is no abnormal enhancement. Bon...
The human brain continues to grow considerably after birth. Compared to measurements taken at birth (mean, SD was 34.9, 1.1 cm), head circumference was found to increase by more than 30% in the first year (46.6, 1.3 cm); between 1 and 4 years of age it increased by another 9% (50.9...
The current review presents an overview of twin studies using MRI in children, adults and elderly, and focuses on cross-sectional and longitudinal designs. The majority of the investigated brain measures are heritable to a large extent (60–80 %), although spatial differences in heritability are ...
14 Gadolinium-diethylenetriamine pentaacetic acid enhancement has more effect on T1 relaxation, which is determined by the characteristics of the magnetic field, than on T2 relaxation, which depends on interactions between the hydrogen nuclei and other macromolecules.14 The Gd-DTPA–enhanced MRI can ...
Increased signal intensity in the pulvinar region on T1-weighted MRI scans (the pulvinar sign) has been described in patients with AFD [86]. Although characteristic, it is not pathognomonic of this disease. It is frequently found in male patients and usually affects both thalami, although a ...
Figure 2. (a,b) Coronal TRUFI MRI in a 23-week fetus, one of dichorionic diamniotic twins, demonstrating bilateral symmetric, oval low-signal-intensity fat pads (black arrows) corresponding to (c) T1 VIBE hyperintensity (white arrow). Figure 3. (a,b) Comparison of TRUFI and HASTE MR...
A positive buccal fat pad sign (BFS) was recorded as present if a round, symmetric, and bilateral area was seen in the submalar region of the face with the following signal characteristics: T1 hyperintensity, low signal on echo planar imaging (EPI), low signal on true fast imaging with ...
MRI has higher sensitivity than CT for the diagnosis of FNH, but in some cases, it may present with atypical features that can generate confusion with HCC, such as a strong hyperintensity on T2-weighted imaging, a pseudocapsule, washout or absence of a central scar in small FNH, and the ...