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Result : Searchterm 'NMR' found in 3 terms [] and 39 definitions []
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Searchterm 'NMR' was also found in the following services: 
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Pulse SequenceForum -
related threadsMRI Resource Directory:
 - Sequences -
 
A pulse sequence is a preselected set of defined RF and gradient pulses, usually repeated many times during a scan, wherein the time interval between pulses and the amplitude and shape of the gradient waveforms will control NMR signal reception and affect the characteristics of the MR images. Pulse sequences are computer programs that control all hardware aspects of the MRI measurement process.
Usual to describe pulse sequences, is to list the repetition time (TR), the echo time (TE), if using inversion recovery, the inversion time (TI) with all times given in milliseconds, and in case of a gradient echo sequence, the flip angle. For example, 3000/30/1000 would indicate an inversion recovery pulse sequence with TR of 3000 msec., TE of 30 msec., and TI of 1000 msec.
Specific pulse sequence weightings are dependent on the field strength, the manufacturer and the pathology.

See also Interpulse Times.
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• Related Searches:
    • MRI Procedure
    • Spin Echo Sequence
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Further Reading:
  Basics:
MYELIN-SELECTIVE MRI: PULSE SEQUENCE DESIGN AND OPTIMIZATION
   by www.imaging.robarts.ca    
Faster speed, better spatial resolution lead 3T benefits
   by sipi.usc.edu    
  News & More:
New MR sequence helps radiologists more accurately evaluate abnormalities of the uterus and ovaries
Thursday, 23 April 2009   by www.eurekalert.org    
Searchterm 'NMR' was also found in the following service: 
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Radiology  (1) Open this link in a new window
Saturation Transfer
 
Nuclei can retain their magnetic orientation through a chemical reaction. Thus, if RF radiation is supplied to the spins at a frequency corresponding to the chemical shift of the nuclei in one chemical state so as to produce saturation or inversion, and chemical reactions transform the nuclei into another chemical state with a different chemical shift in a time short compared to the relaxation time, the NMR spectrum may show the effects of the saturation or inversion on the corresponding, unirradiated line in the spectrum. This technique can be used to study reaction kinetics of suitable molecules.
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Further Reading:
  Basics:
Researchers create novel way to enhance MRI
Tuesday, 30 April 2013   by www.news-medical.net    
  News & More:
New Brain Imaging Technique Identifies Previously Undetected Epileptic Seizure Sites
Friday, 13 November 2015   by www.newswise.com    
MRI Resources 
Artifacts - PACS - Abdominal Imaging - MRI Reimbursement - Libraries - Guidance
 
Sensitive Plane
 
Technique of selecting a plane for sequential plane imaging by using an oscillating magnetic field gradient and filtering out the corresponding time dependent part of the NMR signal. The gradient used, is at right angles to the desired plane and the magnitude of the oscillating magnetic field gradient is equal to zero only in the desired plane.
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Searchterm 'NMR' was also found in the following services: 
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Sensitive Volume
 
Region of the object from which NMR signal will preferentially be acquired because of strong magnetic field inhomogeneity elsewhere. Effect can be enhanced by use of a shaped RF field that is strongest in the sensitive region.
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Radiology  (1) Open this link in a new window
Sinerem®InfoSheet: - Contrast Agents - 
Intro, Overview, 
Characteristics, 
Types of, 
etc.MRI Resource Directory:
 - Contrast Agents -
 
Sinerem® is the brand name (same as Combidex®) for an ultrasmall superparamagnetic iron oxide (USPIO) to detect metastatic disease in lymph nodes. Metastatic nodes show less uptake of this MRI contrast agent, which results in less signal decrease and allows the differentiation of normal lymph nodes from normal-sized, metastatic nodes.
Lymph node imaging with Sinerem® is performed 24 to 36 hours after slow infusion. Normal lymph nodes turn black post contrast, namely on T2* weighted images. Metastatic lymph nodes remain unchanged in signal intensity.
Indication and Diseases: Cancer, Imaging for diagnosis, Lymphatic disorders.
See Ferumoxtran, and Classifications, Characteristics, etc.

Guerbet decided in 2007 to withdraw its Marketing Authorisation Application (MAA) for Sinerem.
Drug Information and Specification
NAME OF COMPOUND
Ferumoxtran, USPIO, AMI-227
CENTRAL MOIETY
Fe3+/Fe2+
CONTRAST EFFECT
r1=25, r2=160, B0=0.47T, r1=23.3, r2=48.9, B0=0.47T
PHARMACOKINETIC
Vascular, lymph v. hepatocyte (AG-USPIO)
CONCENTRATION
DOSAGE
2.6 mg Fe/kg
PREPARATION
Suspend in an isotonic glucose solution
INDICATION
MR angiography vascular, staging of RES-directed liver diseases, lymph nodes
DEVELOPMENT STAGE
-
DISTRIBUTOR
PRESENTATION
DO NOT RELY ON THE INFORMATION PROVIDED HERE, THEY ARE
NOT A SUBSTITUTE FOR THE ACCOMPANYING PACKAGE INSERT!
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Further Reading:
  Basics:
The demise of Combidex - Sinerem
Wednesday, 24 March 2010   by www.wellsphere.com    
  News & More:
Ultrasmall Superparamagnetic Particles of Iron Oxide-enhanced in vivo MRI of human atherosclerotic plaques.(.pdf)
MRI Resources 
MR Myelography - Homepages - Shielding - Patient Information - Diffusion Weighted Imaging - Pathology
 
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