摘要
磁共振弹性成像的效果取决于能否产生一个能与系统序列同步,振幅大小可以传送到被测组织的剪切波。由于气动增压方法磁兼容性好,设计简单,成本较低,具有显著优势。提出一种新的气动增压式激励装置和方法,通过增大气管内压强,使机械波在气管内响应速度更快,减少能量损失。该方法克服了传统气动激励装置由于气体的可压缩性和延滞性,使得能量传递效率明显下降,到达人体组织内的机械波振幅变小,严重影响成像质量的缺点。实验结果表明,气动增压式激励下振动传递效率提升了86%,使得到达组织内的剪切波更加均匀,更加深入,衰减更小,弹性成像质量更高,大大提高了检测效率。
To investigate the magnetic resonance elastography（MRE）,shear wave which is resulting from oscillating stress propagate through the organ,or tissues.The shear waves have to synchronize with the phase of MR signals in MRE experiments.Indeed,the mechanical properties of the target organ can be determined by shear waves.Due to good magnetic compatibility,simple design and low cost,the pneumatic boost pressure method has obvious advantages.The traditional pneumatic drivers cannot reliably and adequately vibrate deeper tissue within the body.As a result,the compressibility and arrearage of air induced low vibration efficiency and image quality.A novel pneumatic boost pressure driver was demonstrated and used for MRE.By increasing the pressure in the tube,the mechanical wave responded faster and reduced the energy loss.The result shows that the boost driver enhanced vibration efficiency by 86%,which conveyed the uniform shear wave with less attenuation into deeper tissue,and improved MRE efficiency and quality.
作者
马璨
单翔
胡亮亮
吴杰
李炳南
高荣科
MA Can;SHAN Xiang;HU Liang-liang;WU Jie;LI Bing-nan;GAO Rong-ke(School of Instrument Science and Opto-electronics Engineering,Hefei University of Technology,Hefei 230009,Chin)
出处
《科学技术与工程》
北大核心
2018年第20期206-212,共7页
Science Technology and Engineering
基金
国家自然科学基金(61571176
61601165)
安徽省重点研究与开发计划(1704d0802188)资助
关键词
磁共振弹性成像
激励装置
增压
气动
magnetic resonance elastography
boost driver
boost pressure
pneumatic
