Acta radiologica
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Accurate identification of the acute infarct core abnormality is important for guiding acute stroke treatment. Abnormality volumes from diffusion-weighted MRI (DWI) and CT perfusion (CTP)-cerebral blood volume (CBV) are highly correlated. DWI lesions have been shown to be reversible at 24 h. ⋯ CTP-derived CBV lesion reversal is associated with TDC(i) truncation during the acute stroke phase.
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Magnetic resonance imaging (MRI) is highly useful for detecting diseases of the bone marrow. The sensitivity for detecting compression fracture is very high, but specificity is low for differential diagnosis between malignant and benign cases. ⋯ In cases of acute compression fracture, malignant bone marrow showed SIR(STIR) values less than 2.0 and SIR (in/opposed) greater than 1.0. In contrast, benign bone marrow showed SIR (STIR) values greater than 2.5. For chronic compression fracture, malignant bone marrow showed SIR (in/opposed) greater than 1.0. Bone marrow was benign in all cases with SIR (in/opposed) less than 1.0.
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Comparative Study
In-phase and out-of-phase gradient-echo imaging in abdominal studies: intra-individual comparison of three different techniques.
T1-weighted gradient-echo in-phase and out-of-phase imaging is an essential component of comprehensive abdominal MR exams. It is useful for the study of fat-containing lesions and to identify various disease states related to the presence of fat in the liver. ⋯ Currently, 2D-GRE remains the best approach for clinical IP/OP imaging. The good image quality of MP-GRE sequences acquired in a free-breathing manner should recommend its use in patients unable to suspend breathing.
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Despite its long history, the application of N-butyl cyanoacrylate (NBCA) has been limited compared to other materials such as particulate agents and coils. This possibly owes to a widespread misconception that NBCA is difficult to handle and carries a high risk of complications due to its liquid nature and rapid polymerization time. However, recent reports have shown that, with knowledge and experience, NBCA is safe and effective to use in visceral arteries. ⋯ The application of NBCA for transcatheter embolization of varied etiologies involving the renal artery is feasible and safe in the hands of an experienced interventional radiologist. It offers immediate and effective occlusion of the pathologic vessel and, while it can be used exclusively on its own, it can also be used to complement other embolic materials.