3Correas J M, Lai X, Qi X, et al. Infusion vs bolus of an ultrasound contrast agent;in vivio does rosponse measurements of B R[ J]. Invest Radiol,2000, 35(1) :72.
4Kim A Y, Choi B I, Kim T K, et al Comparison of contrast-enhanced fundamental imaging, second-harmonic imaging and pulse- inversion harmonic imaging[ J]. Invest Radiol,2001,36(10) :582.
5Spiezia S, Farina R, Cerbone G, et al. Analysis of color doppler single intensity variation after Levovist injection[ J]. Ultrasound Med, 2001,20:223.
6Argalia G, De Bermardis S, Mariani D, et al. Ultrsonographic contrast agent:evaluation of time-intensity curves inthe characterization of solitary thyroid nodules[ J]. Radiol Med,2002,103(4) :407.
2Bartolotta TV, Midiri M, Massimo G, et al. Qualitative and quan titative evaluation of solitary thyroid nodules with contrast-enhanced ultrasound: initial results. Eur Radiol, 2006, 16 (10) 2234-2241.
3Calliada F, Pallavicini D, Pasamonti M, el al. Topical role and future perspectives of sonographic contrasl agents in the differentia diagnosis of solid thyroid lesions. Rays,2000,95: 191-197.
4Spiezia S, Farina R, Cerbone G, et ah Analysis of color Doppler signal intensity variation after ievovist injection: a new approach to lhe diagnosis of thyroid nodules. Journal of ultrasound in medicine, 2001,20(3) :223-231.
5Appetecchia M, Bacaro D, Brigida R, et al. Second generation ultrasonographic contrast agents in the diagnosis of neoplastic thy roid nodules. J Exp Clin Cancer Res,2006,25(3):325 -330.
6Tessler FN, Tublin ME. Thyroid sonography: current applica tions and future directions. J Clin Ultrasound, 1999, 173 : 437- 443.
6Tang J,Yang JC,Luo Y, et al.Enhancement characteristics of benign and malignant focal peripheral nodules in the peripheral zone of the prostate gland studied using contrast-enhanced transrectal ultrasound. Clinical Radiology . 2008
7Pelzer A,Bektic J,Berger AP,et al.Prostate cancer detection in men with prostate specific antigen4to10ng/ml using a com-bined approach of contrast enhanced color Doppler targeted and systematic biopsy. Journal d Urologie . 2005
