Methods:64 patients with 73 adrenal masses confirmed by clinical and pathology were analyzed,the precontrast CT attenuation value of the tumors were greater than 0 HU.

• 方法:64例经临床、病理证实的肾上腺肿瘤共73个病灶,肿瘤的平扫平均CT值>0HU。在CT平扫和增强图像上,分别应用CT象素矩阵图观察肿瘤内有无轻度负CT值区域。