Imaging the olfactory tract (cranial nerve #1).

This review paper browses pros and cons of the different radiological modalities for imaging the olfactory tract and highlights the potential benefits and limitation of more recent advances in MR and CT technology. A systematic pictorial overview of pathological conditions affecting olfactory sense is given. Techniques for collecting quantitative data on olfactory bulb volume and on olfactory sulcus depth are described.

Fibrocartilaginous embolization to the spinal cord: serial MR imaging monitoring and pathologic study.

We report the serial MR imaging and neuropathologic findings in a patient with fibrocartilaginous embolism to the spinal cord, presumptively originating from vertebral body endplates. Extensive increased T2 signal intensity, minimal contrast enhancing foci, concomitant vertebral body bone marrow infarction, and terminal cord hemorrhagic necrosis were the main MR imaging features. Pathologic examination of the cord demonstrated arteriolar occlusions by chondrocytic thrombi resulting in hemorrhagic necrosis.

Comparison of CT and three MR sequences for detecting and categorizing early (48 hours) hemorrhagic transformation in hyperacute ischemic stroke.

Background And Purpose: Our goal was to compare the sensitivity of CT and three MR sequences in detecting and categorizing early (48 hours) hemorrhagic transformation (HT) in hyperacute ischemic stroke.

Methods: Twenty-five consecutive patients with hyperacute ischemic stroke (<6 hours) without MR signs of cerebral bleeding at admission were included. Twenty-one underwent thrombolytic therapy.

Uncommon magnetic resonance imaging observation of lumbar subdural hematoma with cranial origin.

A patient with a history of pain, paresthesias, and weakness in both legs is reported. Magnetic resonance imaging (MRI) of the lumbar spine demonstrated subacute subdural hematoma. Brain MRI obtained 1 day later because of progressive headache showed hemorrhagic cortical metastasis and extensive subdural hematoma.

Which MR-derived perfusion parameters are the best predictors of infarct growth in hyperacute stroke? Comparative study between relative and quantitative measurements.

Purpose: To compare predictors of infarct growth in hyperacute stroke from a retrospective review of various relative and quantitative parameters calculated at perfusion-weighted magnetic resonance (MR) imaging performed within 6 hours after ictus.

Materials And Methods: Fluid-attenuated inversion recovery and diffusion- and perfusion-weighted images were obtained in 66 patients. The initial infarct was delineated on diffusion-weighted images; the hemodynamic disturbance, on apparent mean transit time (MTT) maps; and the final infarct, on follow-up fluid-attenuated inversion recovery images.