Incidence and severity of acute adverse reactions to four different gadolinium-based MR contrast agents.

Purpose: Differences in acute adverse reactions to different gadolinium (Gd)-based contrast agents have not been thoroughly evaluated. We investigated the relationships among the incidence and severity of acute adverse reactions, backgrounds of patients, and 4 types of different Gd-based contrast agents (gadopentetate dimeglumine, gadoteridol, gadoterate meglumine, and gadoxetate disodium).

Materials And Methods: We retrospectively reviewed the radiological records of 10,595 consecutive patients (4,343 female; 6,252 male; mean age, 63.

Secondary signal change and an apparent diffusion coefficient decrease of the substantia nigra after striatal infarction.

Background And Purpose: Diffusion-weighted imaging can depict secondary signal change of the substantia nigra of patients with ipsilateral striatal infarction via a decrease in the apparent diffusion coefficient (ADC). Clinical predictors of this phenomenon remain unclear.

Methods: We assessed 98 stroke patients with acute ischemic lesions in the hemilateral basal ganglia, external capsule, or internal capsule.

[Evaluation of the detectability of vascular stenosis using non-contrast magnetic resonance angiography with various electrocardiographically-gated three-dimensional fast spin echo sequences].

Various three-dimensional fast spin echo (3D-FSE) sequences are used for non-contrast magnetic resonance angiography (MRA). Differences in the ability to detect vascular stenosis using these sequences, however, have not yet been evaluated. The purpose of this study is to evaluate the usefulness of each sequence for the detection of vascular stenosis by using a vascular phantom.

Clinical role of non-contrast magnetic resonance angiography for evaluation of renal artery stenosis.

Background: The association between a gadolinium-based contrast material and nephrogenic systemic fibrosis has been discussed. The purpose of our study was to evaluate whether non-contrast enhanced magnetic resonance angiography (MRA) might provide sufficient information of renal artery stenosis.

Methods And Results: The non-contrast MRA of 26 patients with hypertension was retrospectively reviewed in the present study.