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| | | | | • View the DATABASE results for 'Foldover Artifact' (2).
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| A problem occurs in the phase encoding direction, where the phases of signal-bearing tissues outside of the FOV in the y-direction are a replication of the phases that are encoded within the FOV. This signal will be mapped (wrapped, backfolded) back into the image at incorrect locations.
Foldover suppression ( phase oversampling, no phase wrap) is a user-selectable parameter that maps this signal to its correct location outside the FOV, then discards any signal from outside the FOV before displaying the image. In order to be able to choose this parameter, in most cases more than an average is necessary.
See also Phase Wrapping Artifact and Oversampling. | | | | • View the DATABASE results for 'Foldover Suppression' (4).
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The company is a leading manufacturer and developer of magnetic resonance imaging ( MRI) scanners.
The Patient Friendly MRI Company, formed in 1978, is engaged in the business of inventing, manufacturing, selling and servicing magnetic resonance imaging ( MRI) scanners. FONAR is the oldest MRI company in the world. After receiving hundreds of millions in a windfall from protecting their MRI patents, they made a MRI scanner that no other MRI manufacturer has. One that the patient stands in and they call Indomitable, the Stand-Up MRI. Patients like it because it is the least claustrophobic, most comfortable MRI on the market. Doctors like it because of its superior image quality and for the first time, the patient can be scanned in the weight-bearing position, or the position of pain or symptom. In October of 2004, the company changed the product name of the Stand-Up MRI to the Upright MRI. Fonar introduced the first "open" MRI scanner in 1980 and is the originator of the iron-core nonsuperconductive and permanent magnet technology.
MRI Scanners:
- 0.6T:
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QUAD™ 12000 - Its 19-inch gap and Whisper Gradients™ make it extraordinarily spacious, quiet and comfortable. With its signal to noise advantage of 0.6 T and its comprehensive array of Organ-Specific™ receiver coils, the QUAD™ 12000 provides high-speed, high resolution and high contrast scanning.
Product Specification
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OR 360°™ - cleared for marketing by the FDA in March 2000, 360° access to the patient. A dual-purpose scanner, it can be used for conventional diagnostic scanning when not in surgical mode.
Product Specification
Contact Information
MAIL
FONAR Corporation
110 Marcus Drive
Melville, N.Y. 11747
USA
| | | | • View the NEWS results for 'FONAR Corporation' (87).
| | | • View the DATABASE results for 'FONAR Corporation' (3).
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Contact Information
MAIL
Food and Drug Administration
5600 Fishers Lane
Rockville, Maryland 20857
USA
PHONE
+1-888-463-6332 (see also under E-MAIL)
| | | | • View the NEWS results for 'Food and Drug Administration' (20).
| | | • View the DATABASE results for 'Food and Drug Administration' (9).
| | | | Further Reading: | News & More:
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Occult incorporated ferromagnetic foreign bodies are dangerous, in particular those close to the eyes. The patient's history may help because many patients do not remember such accidents. In case of doubt, X-rays should be taken prior to MR imaging. | | | | • View the DATABASE results for 'Foreign Bodies' (3).
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