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NTIS 바로가기비파괴검사학회지 = Journal of the Korean Society for Nondestructive Testing, v.32 no.5, 2012년, pp.484 - 493
Since the 1980s, there have been many research activities devoted to quantitatively characterizing and imaging human tissues based on sound speed, attenuation coefficient, density, nonlinear B/A parameter, etc., but those efforts have not yet reached the stage of commercialization. However, a new im...
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핵심어 | 질문 | 논문에서 추출한 답변 |
---|---|---|
초음파 B-모드 영상의 문제점은? | 기존의 초음파 B-모드 영상은 주로 조직의 임피던스의 차이에 기인하는 반사 계수(reflection coefficient)를 영상화하기 때문에 암이나 종양 같은 병변을 구변하는 데 어려움이 있었다. 반사 계수 외에도 음속도, 감쇠 계수, 밀도, 비선형 B/A 파라미터 등을 영상화하고자 하는 연구가 1980년대 이후부터 많이 진행되었으나 아직까지 실용화되지 못했다[1-4]. | |
탄성 영상법은 무엇을 알아내는가? | 미국 텍사스 의과대학의 Ophir팀은 1991년에 elastography로 명명된 탄성 영상법을 처음으로 발표하였다[6]. 이 방법은 암 또는 종양이 있는 조직은 정상적 조직에 비해 일반적으로 더 단단한 사실에 착안해 외부에서 조직을 눌러주었을 때 조직이 압축되는 정도의 차이를 구해서 해당 조직이 정상인지 비정상인지를 알아낸다[7-9]. | |
무엇을 촉진법이라고 하는가? | 예전부터 의사들은 손으로 환자의 환부를 눌러보고 그 단단함을 파악해 병변을 진단했다. 이를 촉진법(manual palpation technique)이라고 한다. |
T. Sato, Y. Yamakoshi and T. Nakamura, "Nonlinear tissue imaging," Proc. IEEE Ultrason. Symp., pp. 889-900 (1986)
P. He and A. McGoron, "Parameter estimation for nonlinear frequency dependent attenuation in soft tissue," Ultrasound Med. Biol., Vol. 15, No. 8, pp. 757-763 (1989)
Y. Labyed, T. A. Bigelow and B. L. McFarlin, "Estimate of the attenuation coefficient using a clinical array transducer for the detection of cervical ripening in human pregnancy," Ultrasonics, Vol. 51, No. 1, pp. 34-39 (2011)
D. Yanwu, T. Jie and S. Yongchen, "Relations between the acoustic nonlinearity parameter and sound speed and tissue composition," Proc. IEEE Ultrason. Symp., pp. 931-934 (1987)
Y. Yamakoshi, J. Sato and T. Sato, "Ultrasonic imaging of internal vibration of soft tissue under forced vibration," IEEE Trans. Ultrason. Ferroelec. Freq. Control, Vol. 37, No. 2, pp. 45-53 (1990)
T. A. Krouskop, T. M. Wheeler, F. Kallel, B. S. Garra and T. Hall, "Elastic moduli of breast and prostate tissues under compression," Ultrason. Imaging, Vol. 30, No. 4, pp. 260-274 (1998)
A. Lyshchik, T. Higashi, R. Asato, S. Tanaka, J. Ito, M. Hiraoka, A. B. Brill, T. Saga and K. Togashi, "Elastic moduli of thyroid tissues under compression," Ultrason. Imaging, Vol. 27, No. 2, pp. 101-110 (2005)
K. J. Parker, L. S. Taylor, S. Gracewski and D. J. Rubens, "A unified view of imaging the elastic properties of tissue," J. Acoust. Soc. Am., Vol. 117, No. 5, pp. 2705-2712 (2005)
N. H. Gokhale, P. E. Barbone and A. A. Oberai, "Solution of the nonlinear elasticity imaging inverse problem: The compressible case," Inverse Problems, Vol. 24, No. 4, pp. 1-26 (2008)
S. Goenezen, P. E. Barbone and A. A. Oberai, "Solution of the nonlinear elasticity imaging inverse problem: The incompressible case," Comput. Methods Appl. Mech. Engrg., Vol. 200, Nos. 13-16, pp. 1406-1420 (2011)
K. J. Parker, L. Gao, S. K. Alam, D. Rubens and R. M. Lerner, "Sonoelasticity imaging: Theory and applications," Proc. IEEE Ultrason. Symp., pp. 623-628 (1996)
K. Nightingale, M. S. Soo, R. Nightingale and G. Trahey, "Acoustic radiation force impulse imaging: In vivo demonstration of clinical feasibility," Ultrasound Med. Biol., Vol. 28, No. 2, pp. 227-235 (2002)
A. P. Sarvazyan, O. V. Rudenko, S. D. Swanson, J. B. Fowlkes and S. Y. Emelianov, "Shear wave elasticity imaging: A new ultrasonic technology of medical diagnostics," Ultrasound Med. Biol., Vol. 24, No. 9, pp. 1419-1435 (1998)
A. P. Sarvazyan, O. V. Rudenko, S. D. Swanson, J. B. Fowlkes and S. Y. Emelianov, "Shear wave elasticity imaging: A new ultrasonic technology of medical diagnostics," Ultrasound Med. Biol., Vol. 24, No. 9, pp. 1419-1435 (1998)
R. Y. Yoon, D. G. Hyun, D. K. Shin, S. J. Kwon, M. H. Bae and M. K. Jeong, "Improved ultrasonic elasticity imaging with center frequency estimation and global shift compensation," Proc. IEEE Ultrason. Symp., pp. 1278-1281 (2006)
R. Y. Yoon, S. J. Kwon, M. H. Bae and M. K. Jeong, "Implementation of strain imaging modality in medical ultrasonic imaging system," J. IEEK SC, Vol. 42, No. 3, pp. 53-62 (2005)
M. K Jeong, S. J. Kwon and M. H. Bae, "Real-time implementation of medical ultrasound strain imaging system," J. Kor. Soc. Nondestructive Testing, Vol. 28, No. 2, pp. 101-111 (2008)
T. Shiina, M. M. Doyley and J. C. Bamber, "Strain imaging using combined RF and envelope autocorrelation processing," Proc. IEEE Ultrason. Symp., pp. 1331-1336 (1996)
T. Shiina, M. Yamakawa, N. Nitta and E. Ueno, "Real-time tissue elasticity imaging using the combined autocorrelation method," Hitachi MEDIX Suppl. (2007)
D. Ohwada, Y. Okuyama and K. Kuroda, "Implementation of a combined autocorrelation method for real-time tissue elasticity imaging on FPGA," Proc. IEEE Computer Info. Conf., pp. 891-897 (2008)
A. Pesavento and H. Ermert, "Time-efficient and exact algorithms for adaptive temporal stretching and 2D-correlation for elastographic imaging using phase information," Proc. IEEE Ultrason. Symp., pp. 1765-1768 (1998)
A. Pesavento, A. Lorenz and H. Ermert, "Phase root seeking and the Cramer-Rao lower bound for strain estimation," Proc. IEEE Ultrason. Symp., pp. 1669-1672 (1999)
A. Pesavento, C. Perrey, M. Krueger and H. Ermert, "A time-efficient and accurate strain estimation concept for ultrasonic elastography using iterative phase zero estimation," IEEE Trans. Ultrason. Ferroelec. Freq. Control, Vol. 46, No. 5, pp. 1057-1067 (1999)
U. Bae and Y. Kim, "Direct phase-based strain estimator for ultrasound tissue elasticity imaging," Proc. IEEE EMBS Conf., pp. 1345-1348 (2004)
U. Bae and Y. Kim, "Angular strain estimation method for elastography," IEEE Trans. Ultrason. Ferroelec. Freq. Control, Vol. 54, No. 12, pp. 2653-2661 (2007)
F. Viola and W. F. Walker, "Comparison of time delay estimators in medical ultrasound," Proc. IEEE Ultrason. Symp., pp. 1485-1488 (2001)
F. Viola and W. F. Walker, "A comparison of time-delay estimators in medical ultrasound," IEEE Trans. Ultrason. Ferroelec. Freq. Control, Vol. 50, No. 4, pp. 392-401 (2003)
K. Hoyt, F. Forsberg and J. Ophir, "Comparison of shift estimation strategies in spectral elastography," Ultrasonics, Vol. 44, No. 1, pp. 99-108 (2006)
H. Xie, T. Gauthier and A. T. Fernandez, "The role of local center frequency estimation in Doppler-based strain imaging," Proc. IEEE Ultrason. Symp., pp. 1965-1968 (2007)
R. Kuc, "Generating a minimum-phase digital filter model for the acoustic attenuation of soft tissue," Proc. IEEE Ultrason. Symp., pp. 794-796 (1983)
J. E. Lindop, G. M. Treece, A. H. Gee and R. W. Prager, "Phase-based ultrasonic deformation estimation," IEEE Trans. Ultrason. Ferroelec. Freq. Control, Vol. 55, No. 1, pp. 94-111 (2008)
E. E. Konofagou, T. Varghese, J. Ophir and S. K. Alam, "Power spectral strain estimators in elastography," Ultrasound Med. Biol., Vol. 25, No. 7, pp. 1115-1129 (1999)
E. E. Konofagou, T. Varghese and J. Ophir, "Spectral estimators in elastography," Ultrasonics, Vol. 38, No. 3, pp. 412-416 (2000)
T. Varghese, E. E. Konofagou, J. Ophir, S. K. Alam and M. Bilgen, "Direct strain estimation in elastography using spectral cross-correlation," Ultrasound Med. Biol., Vol. 26, No. 9, pp. 1525-1537 (2000)
K. Hoyt, F. Forsberg and J. Ophir, "Investigation of parametric spectral estimation techniques for elasticity imaging," Ultrasound Med. Biol., Vol. 31, No. 8, pp. 1109-1121 (2005)
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