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Result : Searchterm 'Coil' found in 39 terms [] and 162 definitions []
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Metal Detector CoilMRI Resource Directory:
 - Coils -
 
Metal detector coils can be used to find hidden ferromagnetic materials inside of clothes or the body of persons before entering a scanning room. Magnetic fields attract ferromagnetic objects with forces, which can be dangerous for humans and MRI machines.
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Radiology  (2) Open this link in a new window
Multiple Coil ArrayInfoSheet: - Coils - 
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RF coils, usually in receive mode, arranged to cover the whole region of interest. It has both the spatial coverage of a large region-of-interest coil and the high SNR of a surface coil.
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Further Reading:
  Basics:
System Architecture
2003   by www.revisemri.com    
MRI Resources 
Pregnancy - DICOM - Musculoskeletal and Joint MRI - Developers - MRCP - Patient Information
 
Multiply Tuned CoilInfoSheet: - Coils - 
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 - Coils -
 
RF coil designed to operate at more than one resonance frequency, so that NMR of more than one kind of nucleus can be observed with the same coil.
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Radio Frequency CoilInfoSheet: - Coils - 
Intro, 
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etc.MRI Resource Directory:
 - Coils -
 
A coil is a large inductor with a considerable dimension and a defined wavelength, commonly used in configurations for MR imaging. The frequency of the radio frequency coil is defined by the Larmor relationship.
The MRI image quality depends on the signal to noise ratio (SNR) of the acquired signal from the patient. Several MR imaging coils are necessary to handle the diversity of applications. Large coils have a large measurement field, but low signal intensity and vice versa (see also coil diameter). The closer the coil to the object, the stronger the signal - the smaller the volume, the higher the SNR. SNR is very important in obtaining clear images of the human body. The shape of the coil depends on the image sampling. The best available homogeneity can be reached by choice of the appropriate coil type and correct coil positioning. Orientation is critical to the sensitivity of the RF coil and therefore the coil should be perpendicular to the static magnetic field.

RF coils can be differentiated by there function into three general categories:
The RF signal is in the range of 10 to 100 MHz. During a typical set of clinical image measurements, the entire frequency spectrum of interest is of the order 10 kHz, which is an extremely narrow band, considering that the center frequency is about 100 MHz. This allows the use of single-frequency matching techniques for coils because their inherent bandwidth always exceeds the image bandwidth. The multi turn solenoid, bird cage coil, single turn solenoid, and saddle coil are typically operated as the transmitter and receiver of RF energy. The surface and phased array coils are typically operated as a receive only coil.

See also the related poll result: '3rd party coils are better than the original manufacturer coils'
 
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• View the DATABASE results for 'Radio Frequency Coil' (9).Open this link in a new window

 
Further Reading:
  Basics:
Radio-frequency Coil Selection for MR Imaging of the Brain and Skull Base1
   by radiology.rsnajnls.org    
  News & More:
High-field MRI Coils – that work, superbly, even at 750 MHz
   by www.dotynmr.com    
Magnetic resonance-guided motorized transcranial ultrasound system for blood-brain barrier permeabilization along arbitrary trajectories in rodents
Thursday, 24 December 2015   by www.ncbi.nlm.nih.gov    
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Radiology  (2) Open this link in a new window
Body Wrap Around CoilInfoSheet: - Coils - 
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(BWA) A flexible surface coil for body imaging.
 
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 Anatomic Imaging of the Liver  Open this link in a new window
      

 
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