Browsing by Subject "MRI"
Now showing items 1-20 of 30
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A Controlled Breathing Intervention for Women Undergoing MRI-Guided Breast Biopsy: A Randomized Controlled Trial
(2020)Controlled breathing techniques are widely used to help people manage pain, and there is growing interest in using these approaches during painful outpatient medical procedures. The outpatient MRI-guided breast biopsy is ... -
Accessing Long-lived Nuclear Spin States in Chemically Equivalent Spin Systems: Theory, Simulation, Experiment and Implication for Hyperpolarization
(2014)Recent work has shown that hyperpolarized magnetic resonance spectroscopy (HP-MRS) can trace in vivo metabolism of biomolecules and is therefore extremely promising for diagnostic imaging. The most severe challenge this ... -
An Investigation of MR Sequences for Partial Volume Correction in PET Image Reconstruction
(2019)Brain Positron emission tomography (PET) has been widely employed for the clinic diagnosis of Alzheimer's disease (AD). Studies have shown that PET imaging is helpful in differentiating healthy elderly individuals, mild ... -
Are Periventricular Lesions Specific for Multiple Sclerosis?
(J Neurol Neurophysiol, 2013-05-03)BACKGROUND: The presence of periventricular lesions (PVL) on MRI scans is part of the revised McDonald multiple sclerosis (MS) diagnostic criteria. However, PVL can be found in other neurological diseases including stroke ... -
Assessment of Variability in Liver Tumor Contrast in MRI for Radiation Therapy
(2017)Purpose: To investigate the inter-patient and inter-sequence variation in liver tumor contrast in MRI and the feasibility of improving the liver tumor contrast by using an in-house developed multi-source adaptive fusion ... -
Characterization complex collagen fiber architecture in knee joint using high-resolution diffusion imaging.
(Magnetic resonance in medicine, 2020-01-21)PURPOSE:To evaluate the complex fiber orientations and 3D collagen fiber network of knee joint connective tissues, including ligaments, muscle, articular cartilage, and meniscus using high spatial and angular resolution ... -
Continuous MRI Coil Quality Control Using Clinical Imaging Data
(2022)PurposeCurrent testing requirement for individual coil elements are only once per year. Over time the coils degrade due to near continuous use and mishandling, causing elements to become faulty or die. Faulty coil elements ... -
Cost-effectiveness analysis of the diagnosis of meniscus tears.
(Am J Sports Med, 2015-01)BACKGROUND: Diagnostic imaging represents the fastest growing segment of costs in the US health system. This study investigated the cost-effectiveness of alternative diagnostic approaches to meniscus tears of the knee, a ... -
Development of Five-dimensional Magnetic Resonance Imaging (5D-MRI) for Radiation Therapy
(2018)Accurate delineation of tumor target and organs at risk (OARs) is critically important in modern radiation therapy for optimal treatment planning and precise treatment delivery. Conventionally, radiotherapy treatment planning ... -
Dynamic 129Xe Magnetic Resonance Spectroscopy: Development and Application in Diverse Cardiopulmonary Diseases
(2021)Chronic respiratory diseases are one of the leading causes of death in the US and a driving factor in their mortality rate is the presence of comorbid cardiovascular diseases such as pulmonary hypertension (PH). As an increasing ... -
Evaluation of Eddy-current distortion and EPI distortion corrections in MR diffusion imaging using log-demons DIR method
(2020)Purpose: To investigate the feasibility of the Log-Demons deformable image registration (DIR) method to correct eddy current and Echo Planar Imaging (EPI) distortions while preserving diffusion tensor information.Methods: ... -
Ex Vivo MR Histology and Cytometric Feature Mapping Connect Three-dimensional in Vivo MR Images to Two-dimensional Histopathologic Images of Murine Sarcomas.
(Radiology. Imaging cancer, 2021-05)Purpose To establish a platform for quantitative tissue-based interpretation of cytoarchitecture features from tumor MRI measurements. Materials and Methods In a pilot preclinical study, multicontrast in vivo MRI of murine ... -
In vivo cartilage strain increases following medial meniscal tear and correlates with synovial fluid matrix metalloproteinase activity
(JOURNAL OF BIOMECHANICS, 2015-06-01) -
Incremental value of PET and MRI in the evaluation of cardiovascular abnormalities.
(Insights Imaging, 2016-08)The cardiovascular system is affected by a wide range of pathological processes, including neoplastic, inflammatory, ischemic, and congenital aetiology. Magnetic resonance imaging (MRI) and positron emission tomography (PET) ... -
Integrated RF/shim coil array for parallel reception and localized B0 Shimming: Concepts and Design
(2015)Magnetic Resonance Imaging (MRI) image quality is strongly dependent on the homogeneity of the main magnetic field, B0. Inhomogeneities in this magnetic field lead to image artifacts such as: blurring, signal loss, and gross ... -
Iterative Reconstruction of SPECT Brain with Priors Based on MRI T1 and T2 Images
(2017)Purpose: Although brain Single Photon Emission Computed Tomography (SPECT) exam is a low cost, widely used functional and molecular brain imaging application, it also has poor spatial resolution (64 x 64 or 128 x 128, pixel ... -
Magnetic resonance imaging of graded skeletal muscle injury in live rats.
(Environ Health Insights, 2014)INTRODUCTION: Increasing number of stretch-shortening contractions (SSCs) results in increased muscle injury. METHODS: Fischer Hybrid rats were acutely exposed to an increasing number of SSCs in vivo using a custom-designed ... -
Non-Cartesian MR Microscopy for Cancer Imaging in Small Animals
(2010)Mouse models of cancer are an invaluable tool for studying the mechanism of the disease and the effect of new therapies. Recent years have seen an explosive growth in the development of such models and consequently there ... -
Preclinical Hyperpolarized 129Xe MRI: Development, Applications, and Dissemination
(2018)Hyperpolarized (HP) gas MRI is emerging as a powerful, non-invasive method for imaging lung function. MRI of HP 129Xe and 3He was first introduced in small animals and was soon followed by its clinical implementation. 3He ... -
Predicting 3-D Deformation Field Maps (DFM) based on Volumetric Cine MRI (VC-MRI) and Artificial Neural Networks for On-board 4D Target Tracking
(2019)Organ and tumor positions are constantly subject to change due to involuntary movement from the gastrointestinal and respiratory systems. In radiation therapy, accurate and precise anatomical localization is critical for ...
