T1-weighted images

T1-weighted images

; T1W magnetic resonance imaging (MRI) sequencing that demonstrates anatomy (i.e. fat-/hydrogen-containing structures appear white); contrast with short T1 inverse recovery imaging; STIR
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Enhanced T1-weighted images revealed a peripheral and centrally reticular enhanced left renal mass.
The precontrast, T1-weighted images should be studied to determine whether the lesion can be seen prior to contrast administration.
Areas of high signal on T1-weighted images and low or heterogeneous signal intensity on T2-weighted images can help identify blood products indicative of previous hemorrhage within the tumor.
On MRI scans, dermoid cysts usually appear hyperintense on T1-weighted images consistent with fat content; but, some may appear more heterogenous with minimal enhancement because of the presence of calcifications, hair follicles, epithelial debris and sebaceous secretion.
The lesion had low signal intensity on T1-weighted images, with or without gadolinium enhancement.
Additionally, a small volume of noncontrast-enhancing material in the left frontal sinus was visible, which was mildly hypointense to vitreous humor on T2-weighted images and isointense to muscle on T1-weighted images.
Caption: Figure 2: Brain magnetic resonance imaging post-therapy with coronal and axial fluid attenuated inversion recover-weighted (A and B) and coronal gadolinium-enhanced T1-weighted images (C) showing dramatic reduction of pachymeningeal enhancement.
The mass had similar signal intensity to brain parenchyma on T1-weighted images and showed scattered heterogeneous enhancement (Figure 1).
On T1-weighted images, the mass was minimally hypointense to adjacent subcutaneous fat (Fig.
Chronic rheumatoid arthritis shows intermediate signal intensity on T1-weighted images and relatively decreased signal intensity on T2-weighted images within the synovium.
On contrast enhanced T1-weighted images, no contrast enhancement was noted, and MR angiography was normal.
Thus, magnetic resonance imaging (MRI) applied and showed low signal intensity on T1-weighted images and high signal intensity on T2- weighted images on the left sacrum wing, which is parallel to sacroiliac joint.