Fischer Gregory S, Krieger Axel, Iordachita Iulian, Csoma Csaba, Whitcomb Louis L, Gabor Fichtinger
Center for Computer Integrated Surgery, Johns Hopkins University, USA.
Med Image Comput Comput Assist Interv. 2008;11(Pt 2):509-17. doi: 10.1007/978-3-540-85990-1_61.
This paper reports an experimental evaluation of the following three different MRI-compatible actuators: a Shinsei ultrasonic motor a Nanomotion ultrasonic motor and a pneumatic cylinder actuator. We report the results of a study comparing the effect of these actuators on the signal to noise ratio (SNR) of MRJ images under a variety of experimental conditions. Evaluation was performed with the controller inside and outside the scanner room and with both 1.5T and 3T MRI scanners. Pneumatic cylinders function with no loss of SNR with controller both inside and outside of the scanner room. The Nanomotion motor performs with moderate loss of SNR when moving during imaging. The Shinsei is unsuitable for motion during imaging. All may be used when motion is appropriately interleaved with imaging cycles.
本文报道了对以下三种不同的磁共振成像(MRI)兼容致动器的实验评估:新精超声波电机、纳米运动超声波电机和气缸致动器。我们报告了一项研究的结果,该研究比较了这些致动器在各种实验条件下对磁共振成像(MRI)图像信噪比(SNR)的影响。评估是在扫描室内部和外部使用控制器,以及使用1.5T和3T MRI扫描仪进行的。气缸在扫描室内部和外部使用控制器时,其功能不会导致信噪比损失。纳米运动电机在成像过程中移动时,信噪比会有适度损失。新精电机不适合在成像过程中运动。当运动与成像周期适当交错时,所有这些都可以使用。