What is Ssfp in MRI?
Steady-state free precession MRI (SSFP) is a type of gradient echo MRI pulse sequence in which a steady, residual transverse magnetization (Mxy) is maintained between successive cycles. The sequence is noted for its superiority in dynamic/cine assessment of cardiac function.
Is Ssfp T1 or T2?
Contrast in balanced SSFP is dependent on the T2/T1 ratio. Blood has a much higher T2/T1 ratio than does myocardium. The sequence is flow compensated and intrinsically insensitive to flow because of even echo rephasing, which is due to the multiple GRE pulses used.
What is bSSFP?
The bSSFP sequence is usually understood as “fully balanced”, i.e. all gradients (in x, y, and z direction) have zero 0th moment over each TR (i.e., the time integral of each gradient wave form is 0).
What does Ssfp stand for?
Steady-state free precession (SSFP) imaging is a magnetic resonance imaging (MRI) sequence which uses steady states of magnetizations.
What is TR and TE in MRI?
Repetition Time (TR) is the amount of time between successive pulse sequences applied to the same slice. Time to Echo (TE) is the time between the delivery of the RF pulse and the receipt of the echo signal.
What is effective TE in MRI?
As the echoes are received at different echo times, the echoes corresponding to the central k-space lines are the ones that will determine image contrast. The moment at which theses echoes are acquired is called effective TE.
What is free precession in MRI?
Why they call it steady state free precession?
In general, the term “SSFP” imbeds all steady state sequences and variants thereof, because it just denotes the most basic SSFP principle, as introduced in 1958 by Carr 2: a fast train of radiofrequency (RF) pulses interleaved by periods of so-called “free precession,” indicating the absence of a driving RF excitation …
What is a haste MRI?
HASTE is an echo-planar fast spin echo sequence trademarked by Siemens. The expanded acronym fairly completely describes what it entails: Half-Fourier Acquisition Single-shot Turbo spin Echo imaging.
What can you see with an MRI?
An MRI scan can be used to examine almost any part of the body, including the:
- brain and spinal cord.
- bones and joints.
- breasts.
- heart and blood vessels.
- internal organs, such as the liver, womb or prostate gland.
What is T1 T2 in MRI?
It’s all about FAT and WATER The two basic types of MRI images are T1-weighted and T2-weighted images, often referred to as T1 and T2 images. The timing of radiofrequency pulse sequences used to make T1 images results in images which highlight fat tissue within the body.
What is echo train length in MRI?
Echo train length (ETL) is the single most important parameter. In general, image acquisition time is inversely proportional to ETL. In other words, if a CSE sequence with a certain TR/TE/spatial resolution takes 8 minutes to perform, a FSE sequence with ETL=8 would take only 1 minute.