OBJECTIVE Vascular malformations are uncommon but may confer significant morbidity. Limitations in diagnosis and treatment result from inadequate classification schema and diagnostic algorithms. The crucial distinction is between high-flow and low-flow lesions because this informs prognosis and treatment. This study assessed the utility of dynamic contrast-enhanced magnetic resonance imaging (d...

PURPOSE We aimed to prospectively assess the role of dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) in the evaluation of predictive factors for breast conservative surgery during neoadjuvant chemotherapy. MATERIALS AND METHODS Sixty-six patients were evaluated before the first treatment cycle, after the second cycle, and upon the completion of neoadjuvant chemotherapy accordin...

PURPOSE To develop a k-space formalism that provides a rationale for the design of variable-rate acquisition schemes for dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI). METHODS AND MATERIALS The formalism, termed spatio-temporal bandwidth-based (STBB) analysis, is demonstrated using a priori modeling of object and enhancement characteristics typically observed in DCE-MRI of br...

OBJECTIVES The purpose of this study was to investigate whether quantification of pulmonary perfusion from dynamic contrast-enhanced magnetic resonance imaging (DCE MRI) yields more reproducible results with data acquired during free breathing than with data from conventional breath-hold measurements. MATERIAL AND METHODS Ten healthy male volunteers underwent 2 imaging sessions at a clinical ...

A new methodology based on tensor algebra that uses a higher order singular value decomposition to perform three-dimensional voxel reconstruction from a series of temporal images obtained using dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) is proposed. Principal component analysis (PCA) is used to robustly extract the spatial and temporal image features and simultaneously de-no...

PURPOSE Fitting tracer kinetic models using linear methods is much faster than using their nonlinear counterparts, although this comes often at the expense of reduced accuracy and precision. The aim of this study was to derive and compare the performance of the linear compartmental tissue uptake (CTU) model with its nonlinear version with respect to their percentage error and precision. THEOR...

■ ■ Contrast-Enhanced Magnetic Resonance Angiography t1 Shortening phase encoding Considerations acquisition timing acquisition timing: test Bolus acquisition timing: Signal Initiated acquisition acquisition timing: Dynamic Subtraction Contrast-enhanced Magnetic resonance angiography Imaging parameters advantages of Contrast-enhanced Magnetic resonance angiography Limitations of Contrast-enhanc...

magnetic resonance imaging (mri) contrast agents most commonly agents used in diagnosing different diseases. several agents have been ever introduced with different peculiar characteristics. they vary in potency, adverse reaction and other specification, so it is important to select the proper agent in different situations. we conducted a systematic literature search in medline/pubmed, web of s...

background: magnetic resonance imaging (mri) is the standard method for observing brain plaques and contrast material injection is necessary for demonstrating the active plaque.this study compared the rate of enhancement of plaques with gadovist and magnevist in relapse phase of ms. methods: in this double blind study, after neurological examination of 62 patients in the attack phase of ms, two...