Nakayama M, Yamashita Y, Oyama Y, Ando M, Kadota M, Takahashi M
Department of Radiology, Kumamoto University School of Medicine, Japan.
J Comput Assist Tomogr. 2000 May-Jun;24(3):432-6. doi: 10.1097/00004728-200005000-00015.
The purpose of this work was to assess the effects of hand exercise on perivenous artifact caused by undiluted venous contrast material at thoracic helical CT.
Eighty patients were prospectively and randomly assigned to thoracic helical CT with (n = 42) or without (n = 38) intermittent squeezing of a hand-sized ball during delivery of a contrast material. Two radiologists graded perivenous artifact and arterial enhancement in a blind fashion. CT attenuation values were obtained by region-of-interest measurements from arteries and veins.
Both qualitative and quantitative analyses showed statistically significant differences in the assessment of perivenous artifact (p < 0.01). Perivenous artifact from the subclavian vein was significantly reduced in patients subjected to thoracic helical CT by using a hand exercise method.
Hand exercise during contrast material delivery at thoracic helical CT minimizes perivenous artifact and improves image quality.
本研究旨在评估手部运动对胸部螺旋CT中未稀释静脉造影剂所致静脉周围伪影的影响。
80例患者被前瞻性随机分为两组，42例在注射造影剂时进行间歇性挤压手球，38例不进行。两名放射科医生以盲法对静脉周围伪影和动脉强化进行分级。通过对动脉和静脉进行感兴趣区测量获得CT衰减值。
定性和定量分析均显示，在静脉周围伪影评估方面存在统计学显著差异（p < 0.01）。采用手部运动方法进行胸部螺旋CT检查的患者，锁骨下静脉的静脉周围伪影明显减少。
胸部螺旋CT注射造影剂时进行手部运动可将静脉周围伪影降至最低并提高图像质量。
