Transcription of Physics of MRI
{{id}} {{{paragraph}}}
Example: bachelor of science
Physics of MRI
Physics of MRIYao WangPolytechnic University, Brooklyn, NY 11201 Based on J. L. Prince and J. M. Links, Medical Imaging Signals and Systems, and lecture notes by Prince. Figures are from the textbook except otherwise MRI PhysicsYao Wang, Polytechnic U., Brooklyn2 Lecture OutlineEL582 MRI PhysicsYao Wang, Polytechnic U., Brooklyn3 Lecture Outline Overview of MRI Nuclear spin properties Precession and Larmor Frequency RF excitation Relaxation Contrast mechanismEL582 MRI PhysicsYao Wang, Polytechnic U., Brooklyn4 Magnetic Resonance Imaging Provide high resolution anatomic structure (as with X-ray CT) Provide high contrast between different soft tissues (X-ray CT cannot) No exposure to radiation and hence safe More complicated instrumentation Takes longer to acquire a scan than CT, more susceptible to patient motionCTMRIPETEL582 MRI PhysicsYao Wang, Polytechnic U., Brooklyn5X-ray projectionMRIEL582 MRI PhysicsYao Wang, Polytechnic U.
are not in phase, so that the sum of x-y components is 0, with net magnetization vector in z direction W0=\gamma B_0: Larmor freq. EL582 MRI Physics Yao Wang, Polytechnic U., Brooklyn 14 ... This is called free induction decay (FID), and …
Loading..
Tags:
Information
Domain:
Source:
Link to this page:
Please notify us if you found a problem with this document: