Two-dimensional coronary MR angiography without breath holding
Two-dimensional coronary MR angiography without breath holding
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DOI：
10.1148/radiology.201.3.8939224
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发表时间：
1996-12-01
期刊：
影响因子：
19.7
通讯作者：
Pettigrew, RI
中科院分区：
文献类型：
--
作者：
Oshinski, JN;Hofland, L;Pettigrew, RI
目得：为了确定是否屏气可以消除在二维磁共振（MR）成像的冠状动脉通过使用实时呼吸gating.MATERIALS和METHODS：31名受试者（20名健康志愿者，11例患者）进行了MR成像。13名受试者使用了呼吸监测带，18名受试者使用了导航超声心动图。采用屏气、呼吸门控和采集两个信号的呼吸门控进行MR成像。三位评审员对图像进行了盲法评审，总体图像质量按1（差）到5（优）的等级进行评定。结果：获得两个信号的呼吸门控提供的图像质量上级屏气成像（分别为3.7 vs 3.0; P <0.05）。信噪比测量值（采集两个信号的呼吸门控为14.5，屏气为11.9）支持图像审查的结果。导航回波门控提供了更好的图像质量比监测带（分别为3.7比3.1; P <0.05）。结论：屏气可以通过门控图像采集到呼吸位置的实时监测器来消除。呼吸门控通过采集多个信号来提高分辨率，提供对齐的冠状动脉切片，并提高患者耐受性。
PURPOSE: To determine whether breath holding can be eliminated in two-dimensional magnetic resonance (MR) imaging of the coronary arteries by using real-time respiratory gating.MATERIALS AND METHODS: Thirty-one subjects (20 healthy volunteers, 11 patients) underwent MR imaging. In 13 subjects, a respiratory monitoring belt was used, and in 18 subjects, a navigator echo was used. MR imaging was performed with breath holding, respiratory gating, and respiratory gating with two signals acquired. Three reviewers conducted a blinded review of the images, and overall image quality was rated on a scale from 1 (poor) to 5 (excellent).RESULTS: Respiratory gating with two signals acquired provided image quality superior to that with breath-hold imaging (3.7 vs 3.0, respectively; P < .05). Measurements of signal-to-noise ratio (14.5 for respiratory gating with two signals acquired and 11.9 for breath holding) supported the results of the image review. Navigator-echo gating provided better image quality than the monitoring belt (3.7 vs 3.1, respectively; P < .05).CONCLUSION: Breath holding may be eliminated by gating image acquisition to a real-time monitor of respiratory position. Respiratory gating enables improved resolution by means of acquisition of multiple signals, provides aligned sections of coronary arteries, and improves patient tolerance.