By What is Mprage sequence?
The three-dimension (3D) magnetization-prepared rapid gradient-echo (MP-RAGE) sequence is one of the most popular sequences for structural brain imaging in clinical and research settings. The sequence captures high tissue contrast and provides high spatial resolution with whole brain coverage in a short scan time.
Is Mprage T1 or t2?
MPR is MPRAGE (Magnetization Prepared Rapid Acquisition Gradient Echo) which is a T1 weighted gradient echo pulse sequence. T! W_SE is a T1 weighted Spin-Echo pulse sequence. If the same inversion time is use for both sequences the the contrast in the images will be similar.
What is a Bravo sequence?
All the suggested T1-weighted scans use GE’s “BRAVO” sequence. It is an IR-prep, fast SPGR sequence with parameters tuned to optimize brain tissue contrast.
What is thrive sequence in MRI?
THRIVE is the Philips vendor name; the corresponding sequence in Siemens is Volume Interpolated Breathhold Examination and Liver Acquisition with Volume Acceleration in GE; and (2) 2D T1 fat saturation or Spectral presaturation with inversion recovery (SPIR) has a TR of 9 ms and TE of 4-5 ms.
What is MP2RAGE?
The MP2RAGE sequence is a variation of the standard magnetization prepared rapid gradient echo (MPRAGE) sequence. In contrast to the latter, the MP2RAGE acquires two gradient echo images with different inversion times that can be combined 1.
What is CISS sequence in MRI?
Three-dimensional (3D) constructive interference in steady state (CISS) is a gradient-echo MRI sequence that is used to investigate a wide range of pathologies when routine MRI sequences do not provide the desired anatomic information.
How can you tell the difference between T1 and T2 MRI?
The best way to tell the two apart is to look at the grey-white matter. T1 sequences will have grey matter being darker than white matter. T2 weighted sequences, whether fluid attenuated or not, will have white matter being darker than grey matter. Read more about FLAIR sequence.
What are T1 weighted images?
T1 weighted image (also referred to as T1WI or the “spin-lattice” relaxation time) is one of the basic pulse sequences in MRI and demonstrates differences in the T1 relaxation times of tissues. A T1WI relies upon the longitudinal relaxation of a tissue’s net magnetization vector (NMV).
How can you tell the difference between an MRI sequence?
The best way to tell the two apart is to look at the grey-white matter. T1 sequences will have grey matter being darker than white matter. T2 weighted sequences, whether fluid attenuated or not, will have white matter being darker than grey matter.
What are the different MRI sequences?
The most common MRI sequences are T1-weighted and T2-weighted scans. T1-weighted images are produced by using short TE and TR times. The contrast and brightness of the image are predominately determined by T1 properties of tissue. Conversely, T2-weighted images are produced by using longer TE and TR times.
What is MRI flair?
Fluid-attenuated inversion recovery (FLAIR) is an advanced magnetic resonance imaging sequence that reveals tissue T2 prolongation with cerebrospinal fluid suppression, allowing detection of superficial brain lesions.
What is CISS sequence?