Development of an ultra-broadband ultrasonic imaging system: prototype mechanical sector device.
Development of an ultra-broadband ultrasonic imaging system: prototype mechanical sector device.
复制标题
DOI：
10.1007/s10396-005-0081-8
复制
发表时间：
2006-06-01
期刊：
影响因子：
--
通讯作者：
Ohya, Akihisa
中科院分区：
文献类型：
--
作者：
Akiyama, Iwaki;Saito, Shigemi;Ohya, Akihisa
目得：我们在机械扇形装置中构造了一个超宽带超声换能器，并建立了一个系统原型，以生成具有高次谐波的实时图像。该系统的潜力，以减少斑点也study.METHODS：为了有效地检测回波信号中的高次谐波分量，除了发射换能器，另一个换能器只用于宽带接收是必要的。我们通过将聚偏氟乙烯（PVDF）高分子压电薄膜粘结到发射锆钛酸铅（PZT）换能器的辐射表面来构造接收换能器。通过建立这种PZT-PVDF双层超声探头到超声诊断系统的机械扇区扫描器，超宽带超声成像系统能够实时imaging.Results原型：使用使用原型系统获得的幻影在水中的图像，高次谐波图像的采集与低噪声高达四阶被证明。此外，我们还证实，从基波到四次谐波的谐波分量的对数求和可以有效地减少图像中的斑点噪声。结论：通过使用PZT-PVDF双层超声机械扇形探头从体模获得回波信号，进行实时成像，并且其从基波到四次谐波的高次谐波分量的有效性相对于散斑减少被证实。
PURPOSE: We constructed an ultra-broadband ultrasonic transducer in a mechanical sector device, and prototyped a system to generate real-time images with higher harmonics. The potential of the system to reduce speckle was also studied.METHODS: To efficiently detect the higher harmonic components in echo signals, in addition to the transmitting transducer, another transducer only for broadband reception is necessary. We constructed a receiving transducer by bonding a polyvinylidene fluoride (PVDF) high-polymer piezofilm to the radiation surface of the transmitting lead zirconate titanate (PZT) transducer. By building this PZT-PVDF bi-layered ultrasonic probe into a mechanical sector scanner of an ultrasonic diagnosis system, an ultra-broadband ultrasonic imaging system capable of real-time imaging was prototyped.RESULTS: Using images of phantoms in water acquired using the prototype system, the acquisition of higher harmonic images with less noise up to the fourth order was demonstrated. In addition, we confirmed that the logarithmic summation of harmonic components from the fundamental to the fourth harmonic effectively reduces speckle noise in the images.CONCLUSIONS: By obtaining an echo signal from phantoms using a PZT-PVDF bi-layered ultrasonic mechanical sector probe, real-time imaging was carried out, and the effectiveness of its higher harmonic components from the fundamental to the fourth harmonic was confirmed with respect to speckle reduction.