[1] [1] SUN Jiawei，XU Xiaojun，CAI Qiumao，et al. Epidemiological Study on Thyroid Cancer in China [J]. China Cancer，2013， 22(9)：690-693.

[2] [2] SUN Zhimin，LI Xiaojiang. Advance in diagnosis of thyroid nodules [J]. Journal of Modern Oncology，2013，21(4)：908-911.

[3] [3] BRAUN B，BLANK W. Ultrasonography of the thyroid and parathyroid gland [J]. Der Internist(S0020-9554)，2006，47(7)： 729-746.

[4] [4] HAO Lijun，FANG Junchu，HONG Zhihui，et al. Values of 99mTcO4-thyroid imaging plus ultrasonography in the differential diagnoses of thyroid nodules [J]. National Medical Journal of China，2012，91(45)：3210-3213.

[5] [5] ZHONG Hong，MA Binlin，LIU Lisha，et al. B-ultrasonography and CT imaging in diagnosis of thyroid carcinoma [J]. Journal of Practical Oncology，2010，25(6)：671-673.

[6] [6] EASLEY G R，LABATE D，LIM W Q. Sparse directional image representations using the discrete shearlet transform [J]. Applied and Computational Harmonic Analysis(S1063-5203)，2008，25(1)：25-46.

[7] [7] Lü Li，ZHAO Jia，SUN Hui. Multi-focus image fusion based on shearlet and local energy [C]// Proceeding of the 2010 2nd International Conference on Signal Processing Systems，Dalian，China，July 5-7，2010. New York：IEEE，V1-632-V1-635.

[8] [8] GAO Guorong，XU Luping，FENG Dongzhu. Multi-focus image fusion based on non-subsampled shearlet transform [J]. IET Image Processing(S1751-9659)，2013，7(6)：633-639.

[9] [9] YANG Bin，LI Shutao. Multifocus image fusion and restoration with sparse representation [J]. IEEE Transactions on Instrumentation and Measurement(S0018-9456)，2010，59(4)：884-892.

[10] [10] YU Nannan，QIU Tianshuang，BI Feng，et al. Image features extraction and fusion based on joint sparse representation[J]. IEEE Journal of Selected Topics in Signal Processing(S1932-4553)，2011，5(5)：1074-1082.

[11] [11] ZHANG Baohua，Lü Xiaoqi，ZHANG Chuanting. Multi-focus Image Fusion Algorithm Based on Composite Incentive Model in Surfacelet Domain [J]. Opto-Electronic Engineering，2013，40(5)：88-96.

[12] [12] LI Shutao，YANG Bin，HU Jianwen. Performance comparison of different multi-resolution transforms for image fusion [J]. Information Fusion(S1566-2535)，2011，12(2)：74-84.

[13] [13] CAO Yuan，LI Shutao，HU Jianwen. Multi-focus Image Fusion by Nonsubsampled Shearlet Transform [C]// 2011 Sixth International Conference on Image and Graphics(ICIG)，Hefei，China，August 12-15，2011. New York：IEEE，17-21.