肺血管内肿瘤栓子：ＣＴ上周围肺动脉扩张和串珠状改变肺血管内肿瘤栓子的诊断在临床上和传统放射学上都难以建立，因而罕见。作者从１９８５～１９９１年间的１４００例胸部ＣＴ扫描中发现４例。４例均为男性，年龄１８～５３岁，均有原发肿瘤，包括心房粘液瘤、肾细胞癌... Pulmonary endovascular emboli: the diagnosis of peripheral pulmonary embolism caused by pulmonary artery dilatation and beading changes on the CT is difficult to establish clinically and conventionally and is therefore rare. The authors found 4 cases from 1400 chest CT scans between 1985 and 1991. 4 cases were male, aged 18 to 53 years old, both have primary tumors, including atrial myxoma, renal cell carcinoma ...