European journal of radiology
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The relationship between tumor consistency and apparent diffusion coefficient (ADC) values is controversial. We evaluated the role of the ADC using an advanced diffusion-weighted imaging (DWI) technique. We employed periodically rotated overlapping parallel lines with enhanced reconstruction (PROPELLER) DWI acquired on a 3-T magnetic resonance imaging (MRI) scanner to assess the consistency of pituitary adenomas and examined the relationship between the ADC and the hormone secretion status of the tumors and their MIB-1 labeling index (MIB-1 LI). ⋯ Using the PROPELLER DWI technique we confirmed that the ADC was not correlated with the consistency of pituitary adenomas. We also demonstrate that the ADC was not associated with the hormone-secreting status or the MIB-1 LI of pituitary adenomas.
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Time-resolved contrast-enhanced magnetic resonance (MR) angiography (CEMRA) of the intracranial vasculature has proved its clinical value for the evaluation of cerebral vascular disease in cases where both flow hemodynamics and morphology are important. The purpose of this study was to evaluate a combination of view-sharing with keyhole imaging to increase spatial and temporal resolution of time-resolved CEMRA at 3.0 T. ⋯ View-sharing in keyhole imaging allows for increased spatial and temporal resolution in time-resolved MRA.
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To predict the MR appearance of retained surgical textiles in the acute setting by using an in vitro phantom and body MR imaging protocols. ⋯ We describe the in vitro MR appearance of retained surgical sponges in order to simulate their appearance in the acute setting prior to the mass-like foreign body reaction which may occur in the chronic phase.
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To define the value of multislice computed tomography (CT) in the diagnosis of acute mesenteric ischemia (AMI). ⋯ Multislice CT is an effective imaging technique for the diagnosis of AMI with excellent sensitivity and specificity values.
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To investigate cerebral and cerebellar gray matter abnormalities in patients with first-episode major depressive disorder (MDD). ⋯ Our findings provided additional support for the involvement of limbic-cortical circuits in the pathophysiology of MDD and preliminary evidence that a defect involving the cerebellum may also be implicated.