Diffusible tracers pass the blood-brain-barrier and are taken up by the brain parenchyma. The concentration of the tracer in the brain parenchyma is therefore correlated with the amount of blood flow to the brain parenchyma. With knowledge of the tracer concentration in the arterial blood supply, absolute CBF values can be calculated. Perfusion imaging techniques that use diffusible tracers include Xenon-CT, Single Photon Emission CT (SPECT) and positron emission tomography (PET). PET is generally viewed as the gold-standard perfusion imaging technique, but it is used little in clinical practice due to its high cost, limited availability, and the poor resolution of PET perfusion images.
-->
Subscribe to:
Post Comments (Atom)
Popular Posts
-
3-PLANE LOC AXIAL T1 AXIAL T2 FS CORONAL T1 CORONAL STIR Axial T2 high resolution FIESTA ( Facial Nerves in IAC for any space occu...
-
MP-RAGE stands for Magnetisation Prepared RApid Gradient Echo. MP-RAGE is a 3DFT contrast prepared gradient echo sequence. The T1 weig...
-
Prostrate MRI Appearence T1‐weighted MR images, the normal prostate gland demonstrates homogeneous intermediate to‐ low signal inten...
-
Regional Saturation Bands Regional saturation employs a 90° RF pulse which, when combined with a gradient orthogonal to the imaging p...
-
SOURCE: http://imageradiology.blogspot.com/2012/06/3d-mrcp-pancreas.html The 3D TSE sequence can produce high-spatial-resolution MRCP...
-
CERVICAL MYELOGRAM LUMBAR MYELOGRAM Technique Single-slice MR myelography was ...
-
--> Indications : evaluating for meniscal retears in a postoperative knee. Sequences Knee MR arthrogram MRI Protocol : ...
-
High Resolution Brainstem Imaging CISS (Constructive Interference Steady State) CISS is a strongly T2 weighted GRE sequence. In essen...
-
--> Routine shoulder protocols are the most variable, but most include SHOULDER MRI SEQUENCES ...
-
Without contrast "Tongue MRI Protocol" Localiser Sagital SE T1 Axial SE T1 Coronal SE T1 Axial FSE T2 Coronal...
No comments:
Post a Comment