浅表区域脉冲反转组织谐波成像的机械和临床性能

Mechanical and clinical performance of pulse-inversion tissue harmonic imaging in the superficial region.

作者信息

Sugawara Chieko, Takahashi Akira

机构信息

Department of Oral and Maxillofacial Radiology, Institute of Health Biosciences, The University of Tokushima Graduate School, 3-18-15 Kuramoto-cho, Tokushima, Tokushima, 770-8504, Japan.

Tokushima University Hospital, 3-18-15 Kuramoto-cho, Tokushima, Tokushima, 770-8504, Japan.

出版信息

J Med Ultrason (2001). 2010 Jul;37(3):107-15. doi: 10.1007/s10396-010-0258-7. Epub 2010 Mar 18.

DOI:10.1007/s10396-010-0258-7

PMID:27278009

Abstract

PURPOSE

To compare image quality between fundamental imaging (FI; transmitted and received frequencies 8.0 and 9.0 MHz, respectively) and pulse-inversion tissue harmonic imaging (PI-THI; transmitted frequencies 4.0 and 4.5 MHz, respectively) within 40 mm of the surface of the probe, we tested axial, lateral, and contrast resolution.

METHODS

The axial and lateral resolution were tested by use of a tissue-mimicking test object. For contrast resolution, milk agar blocks of different concentration were used for the comparison test.

RESULTS

The lateral resolution was significantly improved by use of PI-THI at a depth of 20 to 40 mm from the surface of the phantom. Axial resolution was not reduced by use of PI-THI compared with FI. The value of the contrast index was higher in PI-THI than in FI. The researchers also evaluated the two modes clinically, by comparing the visibility of 170 cervical lymph nodes (identification of lymph node, echogenic hilus, parenchymal echogenicity). The results revealed significant advantages of PI-THI over FI for three features.

CONCLUSION

This study suggests that PI-THI might be mechanically and clinically useful in the superficial region.

摘要

目的

为比较探头表面40毫米范围内基础成像（FI；发射和接收频率分别为8.0和9.0兆赫）与脉冲反转组织谐波成像（PI - THI；发射频率分别为4.0和4.5兆赫）之间的图像质量，我们测试了轴向、侧向和对比分辨率。

方法

使用组织模拟测试对象测试轴向和侧向分辨率。对于对比分辨率，使用不同浓度的琼脂乳块进行比较测试。

结果

在距体模表面20至40毫米深度处使用PI - THI可显著提高侧向分辨率。与FI相比，使用PI - THI时轴向分辨率未降低。PI - THI的对比指数值高于FI。研究人员还通过比较170个颈部淋巴结的可视性（淋巴结识别、高回声门、实质回声）对这两种模式进行了临床评估。结果显示PI - THI在这三个特征方面比FI具有显著优势。