Simple Synthesis of 2-Substituted 2-Oxazolines and 5,6-Dihydro-4H-1,3-oxazines

✍ Scribed by Dr. Helmut Witte; Dr. Wolfgang Seeliger

• Publisher: John Wiley and Sons
• Year: 1972
• Tongue: English
• Weight: 206 KB
• Volume: 11
• Category: Article
• ISSN: 0044-8249
• DOI: 10.1002/anie.197202871

✦ Synopsis

application may be in medicine where it might be possible to form three dimensional images of biological structures assuming that the problems associated with the transmission of sound in tissue can be solved.

The fact that systems for use in acoustical holography are rapidly becoming all-electronic (rather than electrooptical) makes instrumentation simpler and suggests that real-time imaging may soon be possible, particularly in view of recent advances in fast Fourier comp~tationl'~. Also the single scanning receiving transducer may soon be replaced by transducer arrays taking advantage of well-known radar techniques in aperture synthesis[*?

The demonstration of stereo displays of acoustical holographic images where all portions of the volume are simultaneously in focus and where depth effects are readily apparent is the most recent advance. All of these innovations appear to be leading us towards extremely practical working systems for use in underwater exploration, materials testing, and perhaps, in biomedical diagnosis.