Building and assessing anatomically relevant phantoms for neonatal transcranial ultrasound

Memoli, Gianluca; Gatto, Matteo; Sadhoo, Neelaksh; Gélat, Pierre; Harris, Russell A.; Shaw, Adam

doi:10.1088/1742-6596/279/1/012007

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2016

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“…The general layout of the phantom is similar to thermal phantoms developed previously at the National Physical Laboratory (NPL) for transabdominal scanning 8,9 and neonatal transcranial scanning. 10 Five 75 mm fine wire K-type insulated thermocouples from Omega Engineering (5SRTC-TT-KI-40-1 M, Manchester, UK) were embedded into a matrix of the standard agar-based soft tissue mimicking material described in IEC 60601-2-37, Annex DD. 3 The recipe, based on a 3% w/w of agar, includes glycerol to match the speed of sound of soft tissues and additives (Silicon Carbide and Aluminium Oxide) to adjust the attenuation and backscatter coefficient.…”

Section: Materials and Methods Phantommentioning

confidence: 99%

Temperature elevation measured in a tissue-mimicking phantom for transvaginal ultrasound at clinical settings

2016

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Overall, the results of the audit for the temperature rise during transvaginal ultrasound at clinical settings fell within the limits indicated by the national and international standards, for the pre-sets tested and following a representative typical scanning protocol. Only selected pre-sets were tested and the scanner outputs were not maximised (for example by using zoom, greater depth or narrow sector angles). Consequently, higher temperatures than those measured can certainly be achieved.

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Section: Materials and Methods Phantommentioning

confidence: 99%