Table of Contents

Standardization of b values allows improved interstudy comparisons on the diagnostic accuracy of diffusion-weighted MR breast examinations.

Results indicate that with full-field digital mammography (FFDM) using computer-aided diagnosis (CAD) and double reading, the detection is as good as that with screen-film mammography, and detection of clustered microcalcifications and ductal carcinoma in situ is improved with FFDM using CAD.

Because characteristic well-circumscribed foci of fat attenuation were found in the majority of patients with tuberous sclerosis complex and not in the control group, such fatty foci may help identify patients suspected of having the disease.

Measurements of interventricular mechanical dyssynchrony obtained by using velocity-encoded MR imaging are equivalent to measurements obtained with pulsed-wave echocardiography and can be used to identify potential responders to cardiac resynchronization therapy.

The severity of a breakthrough reaction is usually similar to the severity of the index reaction, and most injections in premedicated patients do not result in a repeat breakthrough reaction.

CT-determined specific gas volume and hyperpolarized ³He MR imaging–determined gas density allowed quantitative separation of normal regions and those with trapped gas.

This study demonstrates that the combination of erythropoietin and intravenous iron worsens the severity of skin lesions in rats treated with high-dose gadodiamide, as measured by dermal cellularity and deposition of gadolinium.

Definitive diagnosis of peritoneal metastasis (PM) could not be made in 71.7% (38 of 53) of patients proved to have PM at surgery.

We found that perfusion measurements in the thyroid obtained by using a flow-sensitive alternating inversion recovery with steady-state precession MR technique revealed significantly elevated perfusion values in patients with autoimmune thyroid disorders compared with perfusion values in healthy control subjects and significantly elevated perfusion in patients with Graves disease compared with that in patients with Hashimoto thyroiditis.

Closing the gap between patients’ expectations that harmful errors will be disclosed to them and current practice requires understanding the unique challenges that individual specialties, such as radiology, face related to disclosure, and using this information to help physicians communicate with patients more effectively following errors.

There has been a general increase in the tendency for radiologists in our practice to recommend additional or follow-up imaging; the odds ratio of 2.16 (95% confidence interval: 2.11, 2.19) between 1995 and 2008 was estimated from a logistic regression which holds all other factors equal.

If molecular imaging is performed with high doses of diagnostic probes, biologic effects must be considered that can be highly divergent between different cells and may even include loss of cell adhesion and endocytotic activity.

Our preliminary results demonstrate a good flexibility and efficacy of the Willis covered stent in the treatment of distal internal carotid artery aneurysms in selected patients.

A training effect is evident among novice operators and manifests as subtle improvements in resource utilization (cement use) and postprocedural outcome scores (pain at rest, Roland-Morris Disability Questionnaire score), but not among long-term outcomes or mean clinical outcome scores.

In this study, we showed that quantitative measurement of hemodynamic values derived from T2*-weighted dynamic susceptibility-weighted contrast material–enhanced MR imaging results can be used to distinguish recurrent glioblastoma multiforme from external beam radiation therapy–induced necrosis.

The iron concentration of the parietal cortex was significantly positively correlated with the severity of cognitive impairment in patients with Alzheimer disease, indicating that it may be used as a biomarker to evaluate the progression of Alzheimer disease.

Tumor growth within 6 months was better than baseline volumes, relative cerebral blood volume, or apparent diffusion coefficient in predicting time to malignant transformation in untreated low-grade gliomas and was independent of other parameters, including histologic findings.

CT predictors for differentiating benign versus clinically worrisome causes of pneumatosis intestinalis include soft-tissue thickening of the bowel wall, free intraperitoneal fluid, extent of PI, and periintestinal soft-tissue stranding.

The per-capita annual effective radiation dose from medical procedures in the United States is among the highest in the world and is estimated to have increased sixfold from about 0.5 mSv in 1980 to 3.0 mSv in 2006.

A method for distinguishing and displaying the arrival times of intravenously administered contrast material in a vascular territory, as determined with three-dimensional time-resolved contrast-enhanced MR angiography, is presented.

CT was more accurate than Doppler US in the diagnosis of right hepatic vein stenosis in symptomatic patients after living donor liver transplantation; complementary use of CT should be considered when right hepatic vein stenosis is suspected at Doppler US to reduce the incidence of unnecessary invasive venography.

High-dose single-session multipronged ethanol ablation can be used to treat early-stage or recurrent hepatocellular carcinoma up to 5.0 cm effectively and safely and may be applied even for lesions at high-risk locations.