iodinated contrast media adverse reactions.clinical applications of dual-energy CT.as low as reasonably achievable (ALARA).Slice-overlap artifact (also known as cross-talk artifact)įourier transform and Nyquist sampling theorem MRI hardware and room shieldingĪliasing artifact (also known as wrap around artifact) Wild animal, cute character, isolated object on white background, cartoon vector drawing. Zebra, striped horse, African savannah animal, striped hide, line pattern. Many artifacts have a characteristic appearance, and with experience, they can be readily identified. 51,046 zebra cartoon stock photos, vectors, and illustrations are available royalty-free. Remember that artifacts are not all bad and that occasionally, they are intentionally exploited, e.g. Hardware issues may cause central point and RF overflow artifacts. Characteristics of pulse sequences may cause black boundary, Moiré, and phase-encoding artifacts. Finite sampling, k-space encoding, and Fourier transformation may cause aliasing and Gibbs artifact.
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Presence of anatomy outside the image fieldĬlassification of the artifact type may give one an idea about how to try to fix it.Īrtifacts are caused by a variety of factors that may be patient-related, such as voluntary and physiologic motion, metallic implants or foreign bodies. fast spin echo, gradient, volumetric acquisition Select sizes of paper may require users to move a slider or feed the paper into the printer in a non-traditional manner. If your printer works fine with standard paper, you may have a sizing or texture issue. When encountering an unfamiliar artifact, it is useful to systematically examine general features of the artifact to try and understand its general class. To verify this is not the issue, try 8.5 x 11 sheets in your printer. Some artifacts affect the quality of the MRI exam, while others do not affect the diagnostic quality but may be confused with pathology. MRI artifacts are numerous and give an insight into the physics behind each sequence.
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