为什么腹部磁共振检查时要呼吸配合 刘斌 徐州矿务集团总医院 скачать в хорошем качестве

为什么腹部磁共振检查时要呼吸配合 刘斌 徐州矿务集团总医院

为什么腹部磁共振检查时要呼吸配合 刘斌 徐州矿务集团总医院 磁共振检查是一个多参数的成像，它需要扫描很多个序列。这些序列有些需要屏气，有些保持平稳的呼吸就可以。所以在检查过程中患者需要按照医生指令，来进行呼吸和憋气，配合医生完成检查，避免成像模糊。磁共振成像(MRI)在腹部扫描时，常因病人的腹式呼吸造成腹壁起伏运动，在MRI图像上高信号的脂肪和水等组织会随腹壁运动产生半月形或条索状运动伪影，图像清晰度受影响。目前，临床上MRI腹部成像检查多采用呼吸门控技术减少呼吸运动伪影，检查过程中要求患者呼吸频率和幅度保持相对稳定，故检查前需要训练患者呼吸节律，但部分患者由于年龄较大或紧张等因素，往往不能很好地配合，导致受检者呼吸节律紊乱，腹壁随着呼吸的起伏运动频率和幅度不一致，影响了呼吸门控技术在腹部MR成像检查中的应用效果，导致MR图像出现较为严重的呼吸伪影，影响病变的检出和诊断。 Why do we need respiratory coordination in abdominal MRI MRI is a multi parameter imaging, It needs to scan many sequences. Some of these sequences need to hold their breath, Some of them can just breathe smoothly. So during the examination, patients need to follow the doctor's instructions, To breathe and hold your breath, Cooperate with the doctor to complete the examination, Avoid blurring the image. Magnetic resonance imaging (MRI) in abdominal scan, The patient's abdominal breathing often causes the undulating movement of abdominal wall, On MRI images, high signal tissues such as fat and water will produce half moon or cord like motion artifacts along with abdominal wall motion, Image clarity is affected. At present, In clinical MRI abdominal imaging, respiratory gating technology is often used to reduce respiratory motion artifacts, During the examination, the patient's respiratory rate and amplitude should be relatively stable, Therefore, the respiratory rhythm of patients should be trained before examination, However, some patients are older or nervous, They often don't work well, Lead to respiratory rhythm disorder, The frequency and amplitude of abdominal wall motion with the rise and fall of respiration were not consistent, It affects the application effect of respiratory gating technology in abdominal MR imaging, This leads to serious respiratory artifacts in MR images, Affect the detection and diagnosis of lesions.