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22 Resources for

magnetic resonance imaging

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Magnetic Resonance Imaging Changes of Sacroiliac Joints in Patients With Recent-Onset Inflammatory Back Pain: Inter-Reader Reliability and Prevalence of Abnormalities: The aim of this paper was to study the inter-reader reliability of detecting abnormalities of Sacroiliac SI joints in patients with onset inflammatory back pain by Magnetic Resonance Imaging MRI, and to study the prevalence of inflammation and structural changes at various sites of the SI joints. Agreement on the...; Tags: BioMed Central, inflammation, magnetic resonance imaging, joint, patient, agreement; White papers 2005-12-01
Today's High Tech With "Life Technology": An investment in a new imaging device always an investment in the future. Those who have been operating the high-end MAGNETOM Symphony magnetic resonance imaging system still want to benefit from state-of-the-art developments, obtain a return on investment, and at the same time offer patients the highest standard of care...; Tags: Document management, imaging, Siemens AG, magnetic resonance imaging, investment, patient, ROI, benefit; White papers 2005-10-01
Diffusion-Weighted: Magnetic Resonance Imaging: The Jikei University Hospital Tokyo, Japan, is conducting clinical research of diffusion-weighted MRI and its potential in terms of imaging the abdomen, pelvis, and organs other than the brain. On another continent, NYU Medical Center New York is also using this method to obtain information about liver metastases. This paper...; Tags: Siemens AG, magnetic resonance imaging, imaging; White papers 2005-10-01
Molecular Magnetic Resonance Imaging: Molecular MRI mMRI is a special implementation of molecular imaging for the noninvasive visualization of biological processes at the cellular and molecular level. More specifically, mMRI comprises the contrast agent-mediated alteration of tissue relaxation times for the detection and localization of molecular disease markers (such as cell surface receptors, enzymes,...; Tags: Document management, Siemens AG, Molecular Inc., imaging, magnetic resonance imaging, stem-cell, agent; White papers 2005-09-01
Comparison of Magnetic Resonance Imaging Colonography With Conventional Colonoscopy for the Assessment of Intestinal Inflammation in Patients With Inflammatory Bowel Disease: A Feasibility Study: Magnetic resonance imaging MRI based colonography represents a new imaging tool which has mainly been investigated for polyp screening. To evaluate this approach for patients with inflammatory bowel disease IBD, they compared MRI based colonography with conventional colonoscopy for assessing the presence and extent of colonic inflammation. MRI based colonography...; Tags: Harvard University, inflammation, magnetic resonance imaging, patient, imaging, CD, tool; White papers 2004-12-17

Robust Nonrigid Registration to Capture Brain Shift From Intraoperative MRI: The intraoperative magnetic resonance imaging system allows the neurosurgeon to acquire images of the brain during the neurosurgical procedure. In the case of brain tumor resection, this system helps to follow the deformation of the brain. However, even if it provides significantly more information than any other intraoperative imaging system,...; Tags: Harvard University, magnetic resonance imaging, imaging; White papers 2004-08-02
A Limited Range of Measures of 2-D Ultrasound Correlate With 3-D MRI Cerebral Volumes in the Premature Infant at Term: Two-dimensional (2-D) cranial ultrasound US is the principal method for the detection of cerebral injury in the newborn. The aim of this paper was to compare 2-D sonographic methods with more advanced 3-D magnetic resonance imaging MRI for assessing brain structure. From July 1998 to November 2000, they conducted a...; Tags: 2D, magnetic resonance imaging, 3D; White papers 2004-02-05
Statistical Validation of Image Segmentation Quality Based on a Spatial Overlap Index: Scientific Reports: Magnetic resonance imaging MRI provides indispensable information about anatomy and pathology, enabling quantitative pathologic and clinical evaluations. Segmentation is an important image-processing step by which regions of an image are classified according to the presence of relevant anatomic features. The DSC value is a simple and useful summary measure of...; Tags: segmentation, magnetic resonance imaging; White papers 2004-02-01
Shape of Caudate Nucleus and Its Cognitive Correlates in Neuroleptic-Naive Schizotypal Personality Disorder: This paper measures the shape of the head of the caudate nucleus with a new approach based on magnetic resonance imaging MRI in schizotypal personality disorder SPD subjects in whom it previously reported decreased caudate nucleus volume. It was believed MRI shape analysis complements traditional MRI volume measurements. These data...; Tags: magnetic resonance imaging, analysis; White papers 2004-01-12
Prefrontal Cortical Thickness in First-Episode Psychosis: A Magnetic Resonance Imaging Study: Findings from postmortem studies suggest reduced prefrontal cortical thickness in schizophrenia; however, cortical thickness in first-episode schizophrenia has not been evaluated using magnetic resonance imaging MRI. This paper demonstrates the potential usefulness of MRI for the study of cortical thickness abnormalities in schizophrenia. Correlations between cortical thickness and age and...; Tags: magnetic resonance imaging; White papers 2004-01-12
Time-Series Analysis of MRI Intensity Patterns in Multiple Sclerosis: In progressive neurological disorders, such as multiple sclerosis MS, magnetic resonance imaging MRI follow-up is used to monitor disease activity and progression and to understand the underlying pathogenic mechanisms. A specific aim in MRI assessment of MS is to differentiate among inflammation, brain parenchymal degeneration, and reparatory processes, such as...; Tags: Reed Elsevier Inc., magnetic resonance imaging; White papers 2003-10-11
MR Imaging of Pelvic Floor Relaxation: Magnetic resonance imaging MRI has been used as a research tool in evaluation of the female pelvic floor for over a decade. Early studies were limited because of poor resolution and long scan times, which prohibited evaluation of pelvic floor descent. During the past few years, the advent of surface...; Tags: PRODUCTIVITY, magnetic resonance imaging, T2, imaging, technique, tool; White papers 2003-04-18
Magnetic Resonance Imaging Based Three-Dimensional Modeling of a Complex Vulvar Tumor as a Component of Presurgical Planning: This paper is on the pre-surgical evaluation of an aggressive vulvar angiomyxoma using MR based three-dimensional (3D) modeling. A graphics computer was used to outline the tumor and other soft tissue structures on axial T2-weighted MR images of the pelvic floor. Specialized software was then applied to the edited images...; Tags: 3D, magnetic resonance imaging, computer screen, modeling, graphics, computer, photograph, software; White papers 2003-04-17
A Variational Approach to MR Bias Correction: Magnetic resonance MR imaging has opened up new avenues of diagnosis and treatment that were not previously available. There are a number of artifacts which can arise in the MR imaging process and make subsequent analysis more challenging. Probably the most drastic visual effect is the intensity in homogeneity caused...; Tags: Document management, coil, imaging, technique, analysis; White papers 2003-01-01
Feasibility of MR Imaging-Guided Breast Lumpectomy for Malignant Tumors in a 0.5-T Open-Configuration MR Imaging System: This paper describes about the development in the technology for and evaluates the utility of a 0.5-T vertical open-configuration magnetic resonance MR imaging system for imaging-guided breast lumpectomy of malignant tumors. All breast lesions were identified despite limited spatial resolution and fat-suppression techniques. The evolved techniques facilitated intraoperative margin evaluation...; Tags: Document management, PRODUCTIVITY, breast, imaging, magnetic resonance imaging, breast cancer, technique, patient; White papers 2002-07-24
Uncinate Fasciculus Findings in Schizophrenia: A Magnetic Resonance Diffusion Tensor Imaging Study: Disruptions in connectivity between the frontal and temporal lobes may explain some of the symptoms observed in schizophrenia. Conventional magnetic resonance imaging MRI studies, however, have not shown compelling evidence for white matter abnormalities, because white matter fiber tracts cannot be visualized by conventional MRI. Diffusion tensor imaging is a...; Tags: magnetic resonance imaging, fiber, technique; White papers 2002-05-01
Association Between Smaller Left Posterior Superior Temporal Gyrus Volume on Magnetic Resonance Imaging and Smaller Left Temporal P300 Amplitude in First-Episode Schizophrenia: In chronic schizophrenia, the P300 is broadly reduced and shows a localized left temporal deficit specifically associated with reduced gray matter volume of the left posterior superior temporal gyrus STG. In first-episode patients, a similar left temporal P300 deficit is present in schizophrenia, but not in affective psychosis. The present...; Tags: American Medical Association, magnetic resonance imaging, patient; White papers 2002-03-28
Quantitative Analysis of MRI Signal Abnormalities of Brain White Matter With High Reproducibility and Accuracy: The purpose of this paper is to assess the reproducibility and accuracy compared to radiologists of three automated segmentation pipelines for quantitative magnetic resonance imaging MRI measurement of brain white matter signal abnormalities WMSA. The addition of TDS to the EM segmentation and PVEC algorithms significantly improved the accuracy of...; Tags: magnetic resonance imaging, segmentation, quantitative analysis; White papers 2002-01-23
A Functional Magnetic Resonance Imaging Study of Auditory Mismatch in Schizophrenia: Previous researches have noted functional and structural temporal lobe abnormalities in schizophrenia that relate to symptoms such as auditory hallucinations and thought disorder. The goal of this paper was to determine whether the functional abnormalities are present in schizophrenia at early stages of auditory processing. This result is consistent with...; Tags: President, Harvard College, Magnetic Resonance Imaging; White papers 2001-06-01
In-Utero Three-Dimensional Magnetic Resonance Imaging of Fetal Brains: This paper provides details by assessing ten prenatal magnetic resonance imaging MRI scans for fetal brain anomalies, and identified eight that were suitable for post-processing. Anatomical abnormalities were assessed on the three-dimensional (3D) models and compared with two-dimensional (2D) imaging findings. It calculated the volume of the intracranial ventricles and...; Tags: Document management, magnetic resonance imaging, imaging, 3D modeling, 3D, 2D; White papers 2001-04-14