An evaluation of an in vivo local sound speed estimation technique by the crossed beam method
| Autor: | Makoto Hirama, Kiyoshi Okazaki, Kinya Takamizawa, Yasuaki Takehara, Kazuhiro Iinuma, Masafumi Kondo |
|---|---|
| Rok vydání: | 1990 |
| Předmět: |
Physics
Scanner Ultrasound beam Acoustics and Ultrasonics Radiological and Ultrasound Technology business.industry Quantitative Biology::Tissues and Organs Liver Neoplasms Physics::Medical Physics Ultrasound Biophysics Acoustics Imaging phantom Optics Speed of sound Relative magnitude Humans Radiology Nuclear Medicine and imaging Ray tracing (graphics) business Ultrasonography |
| Zdroj: | Ultrasound in Medicine & Biology. 16:65-72 |
| ISSN: | 0301-5629 |
| DOI: | 10.1016/0301-5629(90)90087-s |
| Popis: | An in vivo local sound speed estimation technique, using the crossed beam method, has been proposed and its applicability was evaluated. At first, the potential of this technique was studied by a mapping simulation using the ray tracing technique followed by an experiment with a cylindrical agar phantom. The simulation result showed that an exact measurement of local sound speed values was difficult, but the sound speed information for the local region (its relative magnitude to the surrounding medium) was emphasized as a refraction mapping pattern. The experimental results agreed well with the calculation results. Furthermore, a clinical application was performed, using the clinical system (modified electronic linear scanner), on two liver tumor patients. |
| Databáze: | OpenAIRE |
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