Dipartimento di Scienze Medico Diagnostiche e Terapie Speciali, Università degli Studi di Padova, Via Giustiniani 2, Padova, Italy.
Radiol Med. 2010 Jun;115(4):668-77. doi: 10.1007/s11547-010-0533-0. Epub 2010 Feb 22.
The aim of this study was to develop a quality control programme for ultrasound equipment and assess equipment performance at a single hospital.
We tested 116 transducers by means of a phantom; ultrasound quality control tests were done on parameters from B-mode images, and each parameter was rated according to a three-point score as good, sufficient or poor.
Surface transducers showed worse performance in terms of image uniformity, with 7/55 (13%) transducers rated poor, and depth of penetration, with 24/55 (44%) transducers, rated sufficient or poor. The 3.5-MHz transducers showed worse performance in lateral resolution, with 18/48 (38%) rated poor, and particularly in focusing, with 40/48 (83%) classified as poor. In addition, the 3.5-MHz transducers proved less accurate in vertical distance accuracy than in horizontal distance, with 31/48 (64%) considered sufficient. No significant geometric distortions of masses were identified, although 4/116 (3%) transducers failed to visualise two masses.
The first goal of an ultrasound quality control programme is to establish specific parameters to evaluate equipment performance and, should results be below recommended action levels, implement corrective measures.
本研究旨在为超声设备开发质量控制程序，并评估单家医院的设备性能。
我们使用一个体模对 116 个探头进行了测试；对 B 模式图像的参数进行了超声质量控制测试，每个参数根据三分制评分法评为优、良或差。
表面探头在图像均匀性方面表现较差，有 7/55（13%）个探头评为差，在穿透深度方面，有 24/55（44%）个探头评为良或差。3.5MHz 探头在横向分辨率方面表现较差，有 18/48（38%）个探头评为差，特别是在聚焦方面，有 40/48（83%）个探头评为差。此外，3.5MHz 探头在垂直距离精度方面的准确性不如水平距离，有 31/48（64%）个探头被认为是良。虽然有 4/116（3%）个探头未能显示两个肿块，但并未发现肿块的明显几何失真。
超声质量控制程序的首要目标是确定具体的参数来评估设备性能，如果结果低于建议的行动水平，则应采取纠正措施。
