| Autor: |
T. L. Hickey, W. M. Rosenblum |
| Rok vydání: |
1975 |
| Předmět: |
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| Zdroj: |
Ultrasound in Medicine ISBN: 9781461344452 |
| DOI: |
10.1007/978-1-4613-4443-8_124 |
| Popis: |
The use of ultrasound in tumor location has been well documented (1,2). In this work a direct ultrasonic image of human tissue is produced by using a modified Sokolof ultrasonic image converter. The system used in our laboratory is shown in Figure 1. A continuous ultrasonic wave signal whose frequency is 3.58 MHz is generated by a piezoelectric transmitter. The generated ultrasonic waves propagate through water contained within the tank. The tissue sample is inserted into the ultrasonic field. Transmitted ultrasound waves strike the piezoelectric target of the Sokolof tube after having passed through the entire thickness of the tissue sample. During this passage, the ultrasonic waves undergo reflections and phase shifts. The resulting amplitude and phase changes are converted into a video signal which is displayed on a 19” color TV monitor. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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