Aoki Takako, Nitta Naotaka, Furukawa Akira
Department of Radiological Science, Graduate School of Human Health Science, Tokyo Metropolitan University, 7-2-10 Higashiogu, Arakawa-ku, Tokyo 116-855, Japan.
Radiol Phys Technol. 2013 Jul;6(2):480-5. doi: 10.1007/s12194-013-0223-4. Epub 2013 Jun 1.
The speed of sound (SOS) is available as an index of elasticity. Using a combination of magnetic resonance imaging (MRI) and ultrasound, one can measure the SOS. In this study, we verified the accuracy of SOS measurements by using a combination of MRI and ultrasound. The accuracy of the thickness measurements was confirmed by comparison of the results obtained with use of MRI with those of a non-contact laser, and the accuracy of the calculated SOS values was confirmed by comparison of the results of the combined method and ultrasound measurements with the transmission method ex vivo. There was no significant difference between thickness measurements by MRI and those with the non-contact laser, and there was a significant linear correlation between SOS measurement results by use of the combined method and those by use of the transmission method. We also showed that the SOS values obtained agreed with those of previously published studies.
声速（SOS）可作为弹性指标。结合磁共振成像（MRI）和超声，能够测量声速。在本研究中，我们通过联合使用MRI和超声来验证声速测量的准确性。通过比较MRI测量结果与非接触式激光测量结果来确认厚度测量的准确性，通过将联合方法和超声测量结果与离体传输方法的结果进行比较来确认计算得到的声速值的准确性。MRI测量的厚度与非接触式激光测量的厚度之间无显著差异，联合方法测量的声速结果与传输方法测量的声速结果之间存在显著的线性相关性。我们还表明，所获得的声速值与先前发表的研究结果一致。
