In addition, the Fourier transform method for solving PDE is introduced in Appendix, as well as the numerical algorithm used in the TPM and CTPM.

此外，本文还在附录里介绍了求解偏微分方程的傅立叶变换法，以及TPM和CTPM中的相关数值算法。

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Objective To assess the accuracy and safety of ultrasound-guided percutaneous needle biopsy (US-PCNB) with 16g heavy needle for the diagnosis of central type pulmonary masses (CTPM).

目的评价16g粗针对中央型肺肿块(CTPM)行超声引导经皮穿刺肺活检(US - PCNB)的诊断价值及安全性。

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