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.
-->
Popular Posts
-
Axial Plane: Prescribe plane perpendicular to midshaft of the proximal phalanx of the thumb. Scan from 1st carp-metacarpal joint th...
-
MR Arthrogram Protocol Axial T1 SE Axial T1 SE (fat sat) Sagittal Obl T1 SE (fat sat) Coronal Obl T1 SE (fat sat) Coronal Obl T2 TSE ...
-
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... -
SAGITAL ORBIT MRI PLANNING REFERRAL LINES AXIAL ORBIT MRI PLANNING REFERRAL LINES CORONAL ORBIT MRI PLANNING REFERRAL ... -
Sagital T1 (whole head left to right) Axial Flair (brain) Ax T2 hi-res 3D FSE (symphysis of mandible to superior orbit) Cornonal T2...
-
Normal MRI Anatomy The pectoralis tendon is best seen on axial T1 and T2-weighted images as a curvilinear low-signal band inserting o...
No comments:
Post a Comment