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Ultrashort Turbo Spin EchoInfoSheet: - Sequences - 
Intro, 
Overview, 
Types of, 
etc.MRI Resource Directory:
 - Sequences -
 
(UTSE) The ultrashort turbo spin echo (TSE / FSE) sequence is a technique with extremely short echo spacing, resulting in shorter scan times. This is an advantage in areas where motion is a problem, for example dynamic or abdominal imaging. The shorter scan time and echo spacing are achieved by using a higher TSE factor and an increased data sampling rate.
Disadvantages are the decrease in SNR (caused through the increase of the bandwidth) and artifacts if minimum echo spacing is used (incomplete dephasing of the 180° pulse FID).

See also Fast Spin Echo.
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Further Reading:
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Ultrashort echo time (UTE) MRI of the spine in thalassaemia
February 2004   by bjr.birjournals.org    
MRI Resources 
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Fast Spin Echo Optimization
 
FSE optimization runs a preliminary TR period at the central slice and compares the phase of each echo in the echo train. If the phases do not compliment each other the RF is recalibrated and then the entire sequence is run. If there is an error in calibrating the phases of each of the echoes artifacts will appear.
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Further Reading:
  Basics:
RARE
Monday, 3 December 2012   by www2.warwick.ac.uk    
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MYELIN-SELECTIVE MRI: PULSE SEQUENCE DESIGN AND OPTIMIZATION
   by www.imaging.robarts.ca    
MRI Resources 
Homepages - Stent - Implant and Prosthesis pool - Safety pool - Calculation - Nerve Stimulator
 
Inversion Recovery Spin Echo
 
(IRSE) Form of inversion recovery imaging in which the signal is detected as a spin echo. For TE short compared to the T2 relaxation time, there will be only a small effect of T2 differences on image intensities; for longer TE's, the effect of T2 may be significant.
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Further Reading:
  Basics:
Magnetic resonance imaging
   by www.scholarpedia.org    
Searchterm 'Spin Echo' was also found in the following services: 
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Partial Saturation Spin EchoInfoSheet: - Sequences - 
Intro, 
Overview, 
Types of, 
etc.
 
(PSSE) Partial saturation sequence in which the signal is detected as a spin echo. Even though a spin echo is used, there will not necessarily be a significant contribution of the T2 relaxation time to image contrast, unless the echo time, TE, is on the order of or longer than T2.
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MRI Resources 
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Turbo Spin Echo Turbo Factor
 
(TSE TF) The turbo factor is the number of echoes acquired after each excitation. This is a measure of the scan time acceleration, e.g. at turbo factor 3 the scan time is 3 times faster as a SE sequence with comparable parameters. In combination with profile order and effective echo time the TSE turbo factor controls the echo spacing.

See also Scan Time and Echo Spacing.
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• View the DATABASE results for 'Turbo Spin Echo Turbo Factor' (5).Open this link in a new window

 
Further Reading:
  News & More:
Comparison of Fast Spin-Echo Versus Conventional Spin-Echo MRI forEvaluating Meniscal Tears
June 2005   by www.ajronline.org    
MRI Resources 
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