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FerumoxytolInfoSheet: - Contrast Agents - 
Intro, Overview, 
Characteristics, 
Types of, 
etc.
 
Ferumoxytol is a product candidate for iron replacement therapy in the development pipeline of AMAG Pharmaceuticals Inc, formerly known as Code 7228.
Ferumoxytol has a long blood half-life and may be useful as a blood pool agent in a wide range of applications in MRI. Ferumoxytol is a true intravascular contrast agent that remains in the blood stream for an extended period of time.
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• View the NEWS results for 'Ferumoxytol' (3).Open this link in a new window.

• View the DATABASE results for 'Ferumoxytol' (5).Open this link in a new window

 
Further Reading:
  News & More:
How to stop using gadolinium chelates for magnetic resonance imaging: clinical-translational experiences with ferumoxytol
Saturday, 5 February 2022   by www.ncbi.nlm.nih.gov    
Diffusion-weighted MRI shows promise as a radiation-free alternative for pediatric tumor staging
Wednesday, 19 February 2014   by www.2minutemedicine.com    
Fetal MRI
 
Ultrasound imaging is the primary fetal monitoring modality during pregnancy, nevertheless fetal MRI is increasingly used to image anatomical regions and structures difficult to see with sonography. Given its long record of safety, utility, and cost-effectiveness, ultrasound will remain the modality of first choice in fetal screening. However, MRI is beginning to fill a niche in situations where ultrasound does not provide enough information to diagnose abnormalities before the baby's birth. Magnetic resonance imaging of the fetus provides multiplanar views also in sub-optimal positions, better characterization of anatomic details of e.g. the fetal brain, and information for planning the mode of delivery and airway management at birth.

Indications:
Fetal anomalies
Maternal tumors
Pelvimetry
Examinations of the placenta

Modern fetal MRI requires no sedatives or muscle relaxants to control fetal movement. Ultrafast MRI techniques (e.g., single shot techniques like Half Fourier Acquisition Single shot Turbo spin Echo HASTE) enable images to be acquired in less than one second to eliminate fetal motion. Such technology has led to increased usage of fetal MRI, which can lead to earlier diagnosis of conditions affecting the baby and has proven useful in planning fetal surgery and designing postnatal treatments. As MR technology continues to improve, more advances in the prenatal diagnosis and treatment of fetal abnormalities are to expect. More advances in in-utero interventions are likely as well. Eventually, fetal MRI may replace even some prenatal tests that require invasive procedures such as amniocentesis.

For Ultrasound Imaging (USI) see Fetal Ultrasound at Medical-Ultrasound-Imaging.com.
 
Images, Movies, Sliders:
 Normal Fetus  Open this link in a new window
    

Courtesy of  Robert R. Edelman
 Pregnancy and Small Bowel Obstruction  Open this link in a new window
    

Courtesy of  Robert R. Edelman
 Fetus (Brain) and Dermoid in Mother  Open this link in a new window
      

Courtesy of  Robert R. Edelman

 
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• View the NEWS results for 'Fetal MRI' (2).Open this link in a new window.

• View the DATABASE results for 'Fetal MRI' (5).Open this link in a new window

 
Further Reading:
  Basics:
Fetal MRI is a Valuable Adjunct to Ultrasound in Detecting Abnormal Extracardiac Development in Fetuses with Congenital Heart Defects
Friday, 24 December 2021   by www.itnonline.com    
Specific Absorption Rate and Specific Energy Dose: Comparison of 1.5-T versus 3.0-T Fetal MRI
Tuesday, 7 April 2020   by pubs.rsna.org    
Untangling the Maze, Imaging the Fetus
Tuesday, 30 September 2014   by www.newswise.com    
In fetal MRI, 3T shown to have it all over 1.5T
Tuesday, 12 January 2016   by www.healthimaging.com    
  News & More:
Advances in medical imaging enable visualization of white matter tracts in fetuses
Wednesday, 12 May 2021   by www.eurekalert.or    
Fetal CMR Detects Congenital Heart Defects, Changes Treatment Decisions
Monday, 29 March 2021   by www.diagnosticimaging.com    
MRI scans more precisely define and detect some abnormalities in unborn babies
Friday, 12 March 2021   by www.eurekalert.org    
Ultrasound and Magnetic Resonance Imaging of Agenesis of the Corpus Callosum in Fetuses: Frontal Horns and Cavum Septi Pellucidi Are Clues to Earlier Diagnosis
Monday, 29 June 2020   by pubmed.ncbi.nlm.nih.gov    
MRI helps predict preterm birth
Tuesday, 15 March 2016   by www.eurekalert.org    
3-T MRI advancing on ultrasound for imaging fetal abnormalities
Monday, 20 April 2015   by www.eurekalert.org    
Babies benefit from pioneering 'miniature' MRI scanner in Sheffield
Friday, 24 January 2014   by www.telegraph.co.uk    
Ultrasensitive Detector Pinpoints Big Problem in Tiny Fetal Heart
Tuesday, 6 April 2010   by www.sciencedaily.com    
Real-time MRI helps doctors assess beating heart in fetus
Thursday, 29 September 2005   by www.eurekalert.org    
MRI Resources 
NMR - Fluorescence - Patient Information - MRCP - Mass Spectrometry - Colonography
 
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    
Field EchoInfoSheet: - Sequences -
Intro, Overview, 
Types of, 
etc.
 
(FE) Echo produced by reversing the direction of the magnetic field gradient to cancel out the position-dependent phase shifts that have accumulated due to the gradient.

See also Gradient Echo Sequence.
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• View the NEWS results for 'Field Echo' (1).Open this link in a new window.

• View the DATABASE results for 'Field Echo' (22).Open this link in a new window

Field Echo with Echo Time set for Water and Fat Signals in OppositionInfoSheet: - Sequences -
Intro, Overview, 
Types of, 
etc.
 
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MRI Resources 
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