Many invasive procedures, such as neurosurgeries or breast biopsies, involve inserting a rigid device into the body. To minimize human error, technologies like MRI allow the surgeon to guide the preci...
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The ability to quantify fat concentration in the body has become increasingly important given the rise in obesity and related comorbidities. Likewise, the ability to quantify iron concentration is imp...
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Magnetic resonance imaging (MRI) is sensitive to patient movements due to the long scan times sometimes required. A major source of motion is breathing, which causes artifacts to appear in MR images. ...
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The ability to measure movement of rotating components with high accuracy is crucial in many applications, including astronomical telescope mounts, field surveillance tools, industrial inspection and ...
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Magnetic resonance imaging (MRI) and computed tomography (CT) have become invaluable tools for learning about a patient’s health. However, systems are limited by acquisition speed, which often leads...
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Surgical replacement of joints with mechanical prostheses is on the rise. Unfortunately, complications such as infection and loosening are common and often diagnosed in the late stages, compelling rep...
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Magnetic resonance imaging (MRI) provides high-resolution visualization of soft tissues, allowing diseases to be diagnosed and tracked. In particular, MR images can be used to assess joint degeneratio...
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In magnetic resonance imaging (MRI), the main magnetic field is symbolized B0. Accurately estimating a B0 field map is critical to distinguishing different chemical species like water and fat. If the ...
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More than a million joint replacements were performed in the Unites States in 2012 and more than four million implant surgeries are expected in 2030. Such implants pose a challenge to magnetic resonan...
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Magnetic resonance imaging (MRI) is a diagnostic imaging technique that is especially effective for soft tissues such as the brain and other organs.  To produce an MR image the patient is subject...
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Computed tomography (CT) systems are used for medical imaging and produce images by measuring the loss in an X-ray beam’s strength. These measurements are used to reconstruct an image in 2-D or...
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Magnetic resonance imaging (MRI) is a medical imaging technique that takes measurements, or “views,” of a subject’s nuclear magnetic resonance (NMR) to form images of internal struct...
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Magnetic resonance imaging (MRI) is a medical imaging technique that measures a subject’s nuclear magnetic resonance (NMR) to form images of internal structures. Computed tomography (CT) is ano...
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In 2-D medical imaging, a pulse sequence called inversion recovery (IR) can be used to obtain multiple images of an area with varying magnetization contrast. This helps improve diagnostic certainty. D...
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Inversion recovery (IR) techniques commonly are used in MRI either to null signals or increase signal contrast between tissues. In the process, different types of radiofrequency pulses are followed by...
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Magnetic resonance (MR) imaging technology is used to measure nuclear magnetic resonance (NMR) from various substances in human tissue to produce medical images for qualitative and quantitative assess...
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The problem of constructing a set of points uniformly distributed across the surface of a sphere dates to the early 20th century. The problem is of great importance to modern biomedical imaging and ma...
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Since the introduction of angiography, there have been many attempts to develop techniques that provide diagnostic images of the vasculature while reducing invasiveness. A technique called 4-D DSA (d...
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In magnetic resonance imaging (MRI), the amount of data required to reconstruct an image can be decreased using ‘partial k-space’ sampling. This type of sampling enables shorter breath-hol...
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Assessing treatment response in cancer patients is essential to manage their disease and evaluate therapy. Computed tomography (CT) is widely used to monitor cancer treatment by measuring changes in t...
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Magnetic resonance spectroscopy (MRS) provides a noninvasive means of discovering and quantifying chemical compounds within an area of interest like the brain. The underlying principle is that the ato...
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Magnetic resonance parametric mapping is a general framework for measuring important biomarkers. In the process, several images from the same field of view are obtained using different acquisition par...
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The outcome of a stroke can hinge on the time spent on diagnosis and intervention. Perfusion imaging is a critical step in the process, wherein a patient is scanned to identify salvageable tissue. The...
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Interventional medical procedures can be performed less invasively, and more safely, when guided by magnetic resonance imaging (MRI). Placing devices like catheters, guidewires and stents using MRI gu...
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Acquiring diagnostic images of a patient’s vasculature can be difficult and time consuming. Some magnetic resonance imaging (MRI) techniques employ contrast-enhancing agents, such as gadolinium, tha...
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