Titlebook: How does MRI work?; An Introduction to t Dominik Weishaupt,Victor D. Köchli,Borut Marincek Book 20031st edition Springer-Verlag Berlin Heid

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书目名称How does MRI work?影响因子(影响力)




书目名称How does MRI work?影响因子(影响力)学科排名




书目名称How does MRI work?网络公开度




书目名称How does MRI work?网络公开度学科排名




书目名称How does MRI work?被引频次




书目名称How does MRI work?被引频次学科排名




书目名称How does MRI work?年度引用




书目名称How does MRI work?年度引用学科排名




书目名称How does MRI work?读者反馈




书目名称How does MRI work?读者反馈学科排名

眨眼

Factors Affecting the Signal-to-Noise Ratio,he fact that the MR signal can be disturbed by a feature called “noise”. The following factors contribute to image noise:.The interaction between the MR signal and the noise level is characterised by the “.”. Mathematically, the SNR is the ratio of the signal intensity from a “.” . divided by the st

烦忧

nutrition

Techniques for Imaging the Vascular System,tivity of MR techniques for flow effects. “.” MR angiography (MRA) is based on the induction of signal suppression by flowing spins in combination with conventional spin-echo sequences (see “outflow effect”). This technique does not image the endoluminal vessel morphology well. Its importance is bas

摇曳的微光

Influx

Safety, Risks and Contraindications,tic field bears great risks for both female and male patients, as well as for the staff operating the magnet. Ferromagnetic items in the vicinity of the magnet are particularly hazardous. They can become dangerous missiles (“missile effect”).

渐变

squander

针叶树

Factors Affecting the Signal-to-Noise Ratio,MR signal and the noise level is characterised by the “.”. Mathematically, the SNR is the ratio of the signal intensity from a “.” . divided by the standard deviation of the signal intensity from a region outside the imaged body region or object (i.e. a tissue region not emitting a signal).

生锈

Parallel Imaging,isition. The imaging time for all fast sequences depends crucially on the strength and switching rate of the frequency gradient and the phase encoding gradient. Very rapid switching of strong gradient fields may lead to irritation of nerve cells. This sets physiological limits to ever stronger and faster gradient systems.