Basic MR relaxation mechanisms and contrast agent design
نویسندگان
چکیده
منابع مشابه
Basic MR relaxation mechanisms and contrast agent design.
The diagnostic capabilities of magnetic resonance imaging (MRI) have undergone continuous and substantial evolution by virtue of hardware and software innovations and the development and implementation of exogenous contrast media. Thirty years since the first MRI contrast agent was approved for clinical use, a reliance on MR contrast media persists, largely to improve image quality with higher ...
متن کاملRecent Advances in PET-MR Hybrid contrast agent
Introduction: All of the Imaging modalities have advantages and disadvantages alone. So if we want to have the best and perfect image, combining these modalities produces something we desired. PET-MR images consist of morphologic and metabolic data. MRI and PET provide high spatial and contrast resolution and high sensitivity and molecular information respectively. Hybrid PET-...
متن کاملInhaled oxygen: a brain MR contrast agent?
Oxygen inhalation led to subtle but readily detectable changes on T2*-weighted images with a conventional MR imager at 1.5 T. We attribute the increase in local signal intensity to changes in blood oxygenation, in particular to a net conversion of deoxyhemoglobin to oxyhemoglobin.
متن کاملBasic mechanisms of structural relaxation and diffusion in amorphous silicon
The low-temperature dynamics in amorphous silicon occurs through a sequence of discrete, activated events that reorganize the topology of the network. In this review, we present some recent work done to understand better the nature of these events and the associated dynamics in a-Si. Using the activation-relaxation technique (ART), we generated more than 8000 events in a 1000-atom model of a-Si...
متن کاملBasic Principles of Phase-contrast, Time-of-flight, and Contrast- enhanced MR Angiography
The most widely used MR angiographic imaging techniques can be categorized as phase contrast, time-of-flight, or contrast-enhanced methods. The basic physical principles of each of these techniques are described briefly below. Phase contrast techniques derive contrast between flowing blood and stationary tissues by manipulating the phase of the magnetization, such that the phase of the magnetiz...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Magnetic Resonance Imaging
سال: 2015
ISSN: 1053-1807
DOI: 10.1002/jmri.24787