Page 162 - 《应用声学》2021年第4期
P. 162
646 2021 年 7 月
学模型中的病态问题,可以在目标方程中加入正则 [6] Duck F A. Physical properties of tissues: a comprehensive
项或先验信息,以稳定解空间,加速解的收敛速度。 reference book[M]. Pittsburgh: Academic Press, 2013.
[7] Duric N, Boyd N, Littrup P, et al. Breast density mea-
通过超声声速重建算法的综述,基于射线模型
surements with ultrasound tomography: a comparison
的声速重建算法预计未来将着重向以下几个方向 with film and digital mammography[J]. Medical Physics,
发展: 2013, 40(1): 013501.
[8] Wiskin J, Malik B, Natesan R, et al. Quantitative as-
(1) 目前弯曲射线的追迹算法主要应用于二维
sessment of breast density using transmission ultrasound
超声换能器中,三维换能器中弯曲射线追迹问题尚 tomography[J]. Medical Physics, 2019, 46(6): 2610–2620.
在研究中,开发出能够在三维超声换能器中快速实 [9] Camacho J, Cruza J, González-Salido N, et al. A multi-
现弯曲射线追迹是一个重要的研究方向。基于两点 modal ultrasound breast imaging system[C]. Proceedings
of the Proceedings of the International Workshop on Med-
的射线追迹算法可能可以成为三维射线追迹的重 ical Ultrasound Tomography: 1-3 Nov 2017, Speyer, Ger-
要突破口。 many, F, 2018.
(2) 从原始声波信号中提取的第一到达时间是 [10] Ruiter N V, Zapf M, Hopp T, et al. Usct reference data
base: conclusions from the first spie usct data challenge
声速重建中重要的输入数据,它的精度直接影响最 and future directions[C]. Proceedings of the Medical Imag-
终的图像重建质量。尽管目前现存的第一到达时间 ing 2018: Ultrasonic Imaging and Tomography, F, 2018.
提取算法具有较好的性能,但是在处理较大噪声数 [11] Jaeger M, Frenz M. Towards clinical computed ultrasound
tomography in echo-mode: dynamic range artefact reduc-
据时,仍然存在提取到达时间错误的情况。发展更
tion[J]. Ultrasonics, 2015, 62: 299–304.
鲁棒的第一到达时间提取算法是未来发展的一个 [12] Jakovljevic M, Hsieh S, Ali R, et al. Local speed of sound
重要方向。 estimation in tissue using pulse-echo ultrasound: model-
based approach[J]. The Journal of the Acoustical Society
(3) 最后是基于射线模型的声速重建数学模型
of America, 2018, 144(1): 254–266.
的建立问题。由于实验中超声换能器阵元数量有 [13] Nebeker J, Nelson T R. Breast sound speed tomography
限,往往会出现待重建区域声波射线密度不足的问 from B-mode data[C]. Proceedings of the 2010 IEEE In-
ternational Ultrasonics Symposium, F, 2010.
题,使得重建结果不稳定,为此需要发展更加鲁棒的
[14] Nguyen N Q, Huang L. Ultrasound bent-ray tomography
数学模型。 using both transmission and reflection data[C]. Proceed-
ings of the Medical Imaging 2014: Ultrasonic Imaging and
Tomography, F, 2014.
参 考 文 献 [15] Duric N, Littrup P, Babkin A, et al. Development of
ultrasound tomography for breast imaging: technical as-
sessment[J]. Medical Physics, 2005, 32(5): 1375–1386.
[1] Qu X, Azuma T, Yogi T, et al. Synthetic aperture ultra-
sound imaging with a ring transducer array: preliminary [16] Quan Y, Huang L. Sound-speed tomography using first-
ex vivo results[J]. Journal of Medical Ultrasonics, 2016, arrival transmission ultrasound for a ring array[C]. Pro-
43(4): 461–471. ceedings of the Medical Imaging 2007: Ultrasonic Imaging
[2] Malik B, Terry R, Wiskin J, et al. Quantitative trans- and Signal Processing, F, 2007.
mission ultrasound tomography: imaging and perfor- [17] Duric N, Littrup P, Poulo L, et al. Detection of breast
mance characteristics[J]. Medical Physics, 2018, 45(7): cancer with ultrasound tomography: first results with the
3063–3075. Computed Ultrasound Risk Evaluation (CURE) proto-
[3] Greenleaf J F, Johnson S A, Lee S L, et al. Algebraic re- type[J]. Medical Physics, 2007, 34(2): 773–785.
construction of spatial distributions of acoustic absorption [18] Gemmeke H, Hopp T, Zapf M, et al. 3D ultrasound
within tissue from their two-dimensional acoustic projec- computer tomography: hardware setup, reconstruction
tions[M]//Acoustical Holography. New York: Springer, methods and first clinical results[J]. Nuclear Instruments
1974: 591–603. and Methods in Physics Research Section A: Acceler-
[4] André M, Wiskin J, Borup D. Clinical results with ultra- ators, Spectrometers, Detectors and Associated Equip-
sound computed tomography of the breast[M]// Quanti- ment, 2017, 873: 59–65.
tative Ultrasound in Soft Tissues. Dordrecht: Springer, [19] Pérez-Liva M, Herraiz J, Udías J, et al. Time domain
2013: 395–432. reconstruction of sound speed and attenuation in ultra-
[5] Sehgal C, Brown G, Bahn R, et al. Measurement and sound computed tomography using full wave inversion[J].
use of acoustic nonlinearity and sound speed to estimate The Journal of the Acoustical Society of America, 2017,
composition of excised livers[J]. Ultrasound in Medicine 141(3): 1595–1604.
& Biology, 1986, 12(11): 865–874. [20] Sandhu G Y, West E, Li C, et al. 3D frequency-domain