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Ultrasound Safety
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Radiology Safety Open this link in a new window Magnetic Resonance Imaging Safety Open this link in a new window
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'Safety' in Ultrasound News (26) and in Ultrasound Resources (7) 
Phase 1, 2, 3, 4 Drug Trials 

Different stages of testing drugs in humans for example ultrasound contrast agents, from first application in humans through limited and broad clinical tests, to postmarketing studies. Preclinical trials are the testing in animals.

Phase I: Safety, pharmacokinetics
Phase II: Dose
Phase III: Efficacy
Phase IV: Postmarketing

See also Drug Development and Approval Process USA, Food and Drug Administration, and European Medicines Agency.
  Physiological Risks and Side Effects top
Radiology Safety Open this link in a new window Magnetic Resonance Imaging Safety Open this link in a new window
Excess on occasion is exhilarating. It prevents moderation from acquiring the deadening effect of a habit.----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- -----
- W. Somerset Maugham
 
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