[논문]Evaluation of Acoustic, Thermal, and Morphological Properties in the Egg White Phantom

Kim, Mi-Seon; Kim, Ju-Young; Moon, Dong-Jun; Noh, Si-Cheol; Choi, Heung-Ho

doi:10.9718/jber.2015.36.1.7

Evaluation of Acoustic, Thermal, and Morphological Properties in the Egg White Phantom 원문보기

Journal of biomedical engineering research : the official journal of the Korean Society of Medical & Biological Engineering, v.36 no.1, 2015년, pp.7 - 15

Kim, Mi-Seon (Department of Biomedical Engineering, Inje University) , Kim, Ju-Young (Department of Biomedical Engineering, Inje University) , Moon, Dong-Jun (Department of Biomedical Engineering, Inje University) , Noh, Si-Cheol (Department of Radiological Science, International University of Korea) , Choi, Heung-Ho (Department of Biomedical Engineering, Inje University)

Abstract ▼ AI-Helper

The egg white phantom is a thermal lesion visualization phantom able to illustrate a thermal lesion. It is often used to evaluate the performance of HIFU and is less expensive than the BSA phantom. This study determined the optimal phantom composition for evaluated therapeutic ultrasound machines by varying the egg white concentration in the egg white phantom and demonstrated its utility as a therapeutic ultrasound phantom. The egg white phantom at varying egg white concentrations (10-40% in 10% intervals) was fabricated, and its thermal properties and acoustic properties were assessed. In addition, the size and shape of the formed lesion were compared between the egg white phantom and bovine liver tissue according to the electrical power. The results showed that 30% egg white phantom was optimal for the performance evaluation due to its thermal and acoustic properties. The generated thermal lesions formed sequentially as a cigar, ellipse, tadpole, and cone shapes according to the electrical power; a similar tendency was observed in the liver tissue. Hence, we conclude that the egg white phantom will prove useful in quantitatively evaluating the thermal effects of therapeutic ultrasound.

주제어

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제안 방법

In this study, the acoustic and thermal properties of the egg white phantom were evaluated according to the egg white concentration for use as a thermal visualization phantom. The most appropriate phantom concentration for the therapeutic ultrasound evaluation was determined.
Table 2. The acoustic property comparisons between the egg white phantom (10-40% egg white), liver tissue, and breast tissue.
This study determined the optimal composition for a therapeutic ultrasound phantom by evaluating the acoustic and thermal properties in the phantoms comprising variable egg white concentrations. In addition, the utility of egg white phantom was confirmed by comparing the thermal lesion morphology to that obtained in tissue by therapeutic ultrasonication.

데이터처리

Its image recorded using the same digital camera. The images of the lesions were traced by the same operator in ImageJ, and the lesion areas were calculated using a MATLAB program.

성능/효과

The present study is expected to contribute to a standard therapeutic ultrasound phantom. The results revealed the 30% egg white phantom as the optimal concentration for the therapeutic ultrasound phantom. We surmise that egg white phantom is useful to quantitatively evaluate the thermal effects of therapeutic ultrasound.
There is an upper limit of the sound velocity, density, acoustic impedance, and the lesion size changes above a certain protein proportion. These results, combined with the ease of lesion identification illustrated by visual transparency, indicate that the 30% egg white phantom is the optimal therapeutic ultrasound phantom. A focused ultrasound generated cigar, elliptical, tadpole, and cone-shaped lesions similarly in both the 30% egg white phantom and bovine liver.

후속연구

We surmise that egg white phantom is useful to quantitatively evaluate the thermal effects of therapeutic ultrasound. However, a mismatch of thermal lesion in the egg white phantom and soft tissue will be solved by adjusting the attenuation coefficient, which will obtain through further study.
Also the acoustic properties as well as the thermal properties were also saturated at the specific protein concentration. The present study is expected to contribute to a standard therapeutic ultrasound phantom. The results revealed the 30% egg white phantom as the optimal concentration for the therapeutic ultrasound phantom.

참고문헌 (20)

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