【单选题】【消耗次数：1】
MR检查的影响因素有
①
患者配合
②
呼吸伪影
③
膀胱及肠管蠕动
④
以上均是
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相关题目
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环状伪影的解决方法（）
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更换探测器或者定期校准组件
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适当增大管电流、管电压或扫描时间
③
尽量去除口内金属或者高密度物品
④
在投照过程中，患者闭上眼睛，轻微的呼吸，尽量保持静止，避免移动
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