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Result : Searchterm 'B1' found in 1 term [] and 14 definitions []
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Searchterm 'B1' was also found in the following services: 
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News  (1)  Resources  (1)  Forum  (6)  
 
B-19036InfoSheet: - Contrast Agents - 
Intro, Overview, 
Characteristics, 
Types of, 
etc.MRI Resource Directory:
 - Contrast Agents -
 
Short name: B-19036, central moiety: Gd+
B19036/7 compared with E-7155, Gd-BOPTA, Gd-BOPTA/Dimeg are synonyms for the contrast agent MultiHance®, marketed by Bracco Diagnostics Inc, Milan, Italy. B-19036 is a gadolinium chelate. See also the contrast agent info sheet about classifications, characteristics, etc.
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Further Reading:
  News & More:
FDA Expands Pediatric Age Range for MultiHance Contrast Agent
Tuesday, 30 January 2018   by www.empr.com    
Searchterm 'B1' was also found in the following services: 
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Radiology  (631) Open this link in a new windowUltrasound  (680) Open this link in a new window
Bird Cage CoilInfoSheet: - Coils - 
Intro, 
Overview, 
etc.MRI Resource Directory:
 - Coils -
 
A RF coil, often a transmit receive coil with a number of wires running along the z-direction, arranged to give a cosine current variation around the circumference of the coil, which looks like a bird cage. The bird cage coil works on a different principle to conventionally tuned local and surround coils in that it behaves like a tuned transmission line with one complete cycle of standing wave around the circumference. The frequency supply is generated by an oscillator, which is modulated to form a shaped pulse by a product detector controlled by the waveform generator. The signal must be amplified to 1000's of watts. This can be done using either solid state electronics, valves or a combination of both.
The bird cage coil design provides the best field homogeneity of all RF imaging coils.
One advantage is that it is simple to produce an exceedingly uniform B1 radio frequency field over most of the coil's volume, with the result of images with a high degree of uniformity.
A second advantage is that nodes with zero voltage occur 90° away from the driven part of the coil, thus facilitating the introduction of a second signal in quadrature, which produces a circularly polarized radio frequency field.
This type of volume coil is used for brain (head) MRI, or MR imaging of joints, such as the wrist or knees.

See also the related poll result: '3rd party coils are better than the original manufacturer coils'
 
Images, Movies, Sliders:
 Brain MRI Images T1  Open this link in a new window
 Anatomic MRI of the Knee 1  Open this link in a new window
    
SlidersSliders Overview

 MRI of the Brain Stem with Temoral Bone and Auditory System  Open this link in a new window
    
SlidersSliders Overview

 
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• View the DATABASE results for 'Bird Cage Coil' (4).Open this link in a new window

 
Further Reading:
  Basics:
HEAD AND NECK MRI GRADIENT COIL DESIGN
Thursday, 26 August 1999   by www.imaging.robarts.ca    
System Architecture
2003   by www.revisemri.com    
  News & More:
On the Horizon - Next Generation MRI
Wednesday, 23 October 2013   by thefutureofthings.com    
TOSHIBA INTRODUCES 32 ELEMENT COILS FOR ITS VANTAGE TITAN MR SYSTEMS
Tuesday, 9 November 2010   by medical.toshiba.com    
MRI Resources 
Breast Implant - Fluorescence - Libraries - Health - Resources - MRI Accidents
 
Depth Pulses
 
Use of multiple RF pulses with an inhomogeneous RF field to enable acquiring data from only selected regions within the field. This provides a 'one-dimensional' localization along isocontours of the B1 field.
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• View the DATABASE results for 'Depth Pulses' (3).Open this link in a new window

Searchterm 'B1' was also found in the following services: 
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News  (1)  Resources  (1)  Forum  (6)  
 
FID Signal ArtifactInfoSheet: - Artifacts - 
Case Studies, 
Reduction Index, 
etc.MRI Resource Directory:
 - Artifacts -
 
Quick Overview
Artifact Information
NAME
FID (with spin echo) signal
DESCRIPTION
Line across the center of the image
REASON
Combination of problems
HELP
Call the service
A combination of B1 inhomogeneity, poor slice profile, and insufficient spoiler gradients between the refocusing pulse and the readout interval of a spin echo sequence results in a FID signal being detected along with the echo.
Since the FID is not phase encoded (normally the phase encoding occurs before the refocusing pulse), it is not dispersed along the phase encoding axis, but appears as a line across the center of the image.
mri safety guidance
Image Guidance
If the problem persists, it must be addressed by a service representative.
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• View the DATABASE results for 'FID Signal Artifact' (2).Open this link in a new window

 
Further Reading:
  News & More:
MRI Artifact Gallery
   by chickscope.beckman.uiuc.edu    
Searchterm 'B1' was also found in the following services: 
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Radiology  (631) Open this link in a new windowUltrasound  (680) Open this link in a new window
Hardware
 
MRI hardware includes the electrical and mechanical components of a scanning device.
The main hardware components for the MRI machine are:
The magnet establishing the B0 field to align the spins.
Within the magnet are the gradient coils for producing variations in B0 in the X, Y, and Z directions to make a localization of the received data possible.
Within the gradient coil or directly on the object being imaged is the radio frequency (RF) coil. This RF coil is used to establish the B1 magnetic field necessary to excite the spinning nuclei. The RF coil also detects the signal emitted from the spins within the object being imaged.
The RF amplifier increases the power of the pulses.
The analog to digital converter converts the received analog raw data into digital values.
Depending on the design of the device and the body part being imaged the patient is positioned inside the magnet (e.g. on a movable table or standing upright).
The MRI scan room is surrounded by a RF shield (Faraday cage).
In addition, a computer console, a display, and a film printer belong to the MRI equipment.

See also the related poll result: 'Most outages of your scanning system are caused by failure of'
Radiology-tip.comradCT Scanner,  Gamma Camera
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Medical-Ultrasound-Imaging.comUltrasound Machine
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• View the DATABASE results for 'Hardware' (19).Open this link in a new window


• View the NEWS results for 'Hardware' (1).Open this link in a new window.
 
Further Reading:
  Basics:
Imaging Hardware
   by www.fmrib.ox.ac.uk    
  News & More:
Why non-magnetic capacitors matter in medical imaging
Wednesday, 19 February 2020   by www.medicaldesignandoutsourcing.com    
A transportable MRI machine to speed up the diagnosis and treatment of stroke patients
Wednesday, 22 April 2015   by medicalxpress.com    
Magnetic resonance angiography: current status and future directions
Wednesday, 9 March 2011   by www.jcmr-online.com    
MRI Resources 
Implant and Prosthesis - Developers - Breast MRI - Anatomy - Functional MRI - RIS
 
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MRI is trending to low field magnets :
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