Kusunoki M, Yanagi H, Kamikonya N, Hishikawa Y, Shoji Y, Yamamura T, Utsunomiya J
Second Department of Surgery, Hyogo College of Medicine, Nishinomiya, Japan.
J Am Coll Surg. 1994 Dec;179(6):653-6.
We evaluated the ability of magnetic resonance imaging (MRI) to define local extension of rectal carcinoma.
Thirty-three patients with rectal carcinoma were preoperatively assessed by MRI.
When sagittal or coronal images, or both, were added to transverse images as needed, the sensitivity rate was 84.2 percent and the specificity rate was 92.9 percent. False-positive results when using only transverse images were mainly related to slight extramural spread, to an anterior location in the lower rectum (partial volume effect), and to massive extramural spread of the middle rectal tumors.
Preoperative MRI was helpful to define tumor extension three-dimensionally.
我们评估了磁共振成像（MRI）界定直肠癌局部扩散范围的能力。
33例直肠癌患者术前行MRI评估。
根据需要，矢状面或冠状面图像，或两者均添加到横断面图像时，敏感度为84.2%，特异度为92.9%。仅使用横断面图像时的假阳性结果主要与轻微的壁外扩散、直肠下段的前部位置（部分容积效应）以及直肠中段肿瘤的大量壁外扩散有关。
术前MRI有助于三维界定肿瘤扩散范围。
