Development of a Nondestructive Method for Ultrasonic Evaluation of Adhesive Bond Joint Performance

Maeva, E.; Chapman, Gilbert B.; Severin, F.; Maev, Roman Gr.

doi:10.1007/978-1-4419-8606-1_44

Cited by 3 publications

(1 citation statement)

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“…Increased signal attenuation accompanies higher frequency acoustic waves, however, resulting in weakened signal reflectance and decreased signal depth. These disadvantages are minimized in the SAM imaging system through the use of an acoustic lens for focusing the ultrasound beam to a specific depth within the specimen (Maeva et al ., 2002). The focusing lens transmits sound waves into the specimen from the bottom of a cylindrical acoustic transducer.…”

Section: Methodsmentioning

confidence: 99%

The use of pulse‐echo acoustic microscopy to non‐invasively determine the sex of living larval sea lampreys

Maeva

Bruno

Zielinski

et al. 2004

Journal of Fish Biology

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A rapid, accurate and non-invasive method to determine the sex of larval sea lampreys Petromyzon marinus, using wide-field pulse-scanning acoustic microscopy, is described. Crosssectional pulse-echo scans were made with a high-resolution acoustic microscope in 48 larvae (110-130 mm total length, L T ), and the acoustic images generated showed such internal body structures as the gonad, intestine, kidneys, cardinal veins, notochord and musculature. Females were identified by the presence of a relatively large (1-1Á5 mm diameter) ovary, which was considerably less reflective to the 15 to 25 MHz acoustic signals than the surrounding kidney tissue. Males were recognized by the lack of the large non-reflective ovary and, in some cases, the appearance of a small (0Á2-0Á3 mm) testis with slightly stronger reflective properties than the kidney. Identification of sex was confirmed by optical microscopy following dissection, and in a blind test on an additional 10 specimens (121-168 mm L T ), the acoustic method reliably identified sex in 100% of the larvae. These results indicate that acoustic microscopy can determine the sex of live sea lamprey larvae in c. 30 s per animal, a process which until now required dissection or invasive surgery. # 2004 The Fisheries Society of the British Isles

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Section: Methodsmentioning

confidence: 99%