منابع مشابه
Artifacts and pitfalls in diffusion MRI.
Although over the last 20 years diffusion MRI has become an established technique with a great impact on health care and neurosciences, like any other MRI technique it remains subject to artifacts and pitfalls. In addition to common MRI artifacts, there are specific problems that one may encounter when using MRI scanner gradient hardware for diffusion MRI, especially in terms of eddy currents a...
متن کاملArtifacts in Diffusion MRI
This chapter focuses on artifacts that are relevant for diffusion • imaging studies of the brain in a clinical research setting. For typical clinical studies, the most relevant sources of “physi • ological noise” artifacts are subject motion and cardiac pulsation, and the most common sources of “system-related artifacts” are eddy current distortions. Artifacts not only increase the variability...
متن کامل"Pitfalls in Diffusion: What Artifacts Should I Worry About?"
This presentation covers the sources of many common diffusion image artifacts. Some of these arise from the limitations of single-shot echoplanar imaging (EPI), including low spatial resolution, blurring effects of T2* decay and T2 decay occurring during image readout, and sensitivity to artifacts due to Nyquist ghosting, chemical shift, magnetic field inhomogeneity, and local susceptibility ef...
متن کاملPitfalls and artifacts in electrocardiography.
The standard 12-lead ECG is a common diagnostic test that provides a wealth of diagnostic information of value for clinical decision making. Its value, however, depends upon the accuracy of its recording. This article presents common errors in clinical electrocardiography including inaccurate lead placement, inappropriate serial comparisons using different lead sets, lead wire reversals, inappr...
متن کاملArtifacts, Pitfalls and Normal Variants
Image artifacts are encountered daily in clinical ultrasonography and may be a source of confusion for the interpreting sonologist. The understanding of the mechanisms behind their production allows recognition of artifacts and avoids misinterpretations and incorrect diagnoses. Some artifacts may be avoidable and arise secondary to improper scanning technique. Other artifacts are generated by t...
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ژورنال
عنوان ژورنال: Journal of Magnetic Resonance Imaging
سال: 2006
ISSN: 1053-1807,1522-2586
DOI: 10.1002/jmri.20683