European journal of radiology
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Diffusion-weighted (DW) magnetic resonance (MR) imaging is an MR technique used to show molecular diffusion. The apparent diffusion coefficient (ADC), as a quantitative parameter calculated from the DW MR images. The purpose of this study is to evaluate the ability of DW MR imaging in early phase of obstruction due to urolithiasis. ⋯ We did not observe significantly different ADC values of early phase of obstructed kidneys compared to normal kidneys.
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The choice of therapies for Crohn's disease has expanded greatly over the past 30 years. Increasingly it is important that we attempt to identify subgroups of patients who will benefit most from each type of therapy. This article reviews the therapeutic options currently available, organized by the goal the practitioner hopes to achieve. Imaging is one critical way of aiding the classification of Crohn's disease by attempting to accurately determine the location, extent and, most importantly, the nature of the disease.
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Comparative Study
Detection of osseous metastases of the spine: comparison of high resolution multi-detector-CT with MRI.
The aim of the study was to evaluate the diagnostic accuracy of multi-slice-computed tomography (MDCT) for the detection of vertebral metastases in comparison to magnetic resonance imaging (MRI). ⋯ Although 16/64-row-MDCT provides excellent image quality and a high spatial resolution in the assessment of bony structures, metastatic lesions without significant bone destruction may be missed. The diagnostic accuracy of MRI proved to be significantly superior to 16/64-row-MDCT for the detection of osseous metastases.
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The purpose of this study was to determine the normative apparent diffusion coefficient (ADC) values at 3T using high b-value (3000 s/mm(2)) diffusion-weighted images (DWI) and compare the signal characteristics of the high b value with standard b-value (1000 s/mm(2)) DWI. ⋯ The ADC values calculated from standard b-value DWI were significantly higher than those calculated from high b-value DWI. These results agree with the previous studies. In the regions where CNR values increase with high b value, b3000 DWI images may provide additional clinical information.
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To investigate the feasibility of implementing quantitative T1-perfusion in the routine MRA-protocol and to obtain a first experience in normals and pathology. ⋯ Combined quantitative T1-perfusion and MRA have a potential for noninvasive renovascular screening and may provide an anatomical and physiological evaluation of renal status.