Amin Z, Boulos P B, Lees W R
Department of Imaging, UCL Hospitals Trust, Middlesex Hospital, London, UK.
Clin Radiol. 1996 Jan;51(1):56-61. doi: 10.1016/s0009-9260(96)80221-2.
Abdominal spiral computed tomography (CT) pneumocolon is performed after cleansing the colon, using a smooth muscle relaxant and rectal air insufflation. Rapid dynamic scanning is undertaken with intravenous contrast to give optimal hepatic and vascular enhancement, and 5-10 mm contiguous slices. The area of interest in the colon is reconstructed every 2.5 mm. This technique was performed in four patients with colorectal cancer and the CT findings were compared with the barium enema and pathology following surgical resection. Spiral CT pneumocolon clearly showed the primary tumour in all cases as an enhancing soft tissue mass, and was able to detect local extension and lymphadenopathy as well as assess the liver, peritoneum and remaining abdomen. CT depicted the morphology of the primary tumour more clearly than barium enema, and in one case also detected a 1 cm polyp which was not seen on the barium study because the patient was incontinent of barium and views were limited. There was good correlation between the CT and pathological findings. Compared to a barium enema, spiral CT pneumocolon is quick, with minimal patient discomfort, no risk of barium incontinence, and there is good assessment of the local and distant abdominal disease. Multiplanar formatting is possible and 3-D reconstruction gives intra- and extra-luminal views.
腹部螺旋计算机断层扫描（CT）气钡双重造影是在清洁结肠后，使用平滑肌松弛剂并经直肠注入空气进行的。采用静脉内造影剂进行快速动态扫描，以实现肝脏和血管的最佳强化，并进行5 - 10毫米的连续切片扫描。结肠感兴趣区域每隔2.5毫米进行重建。对4例结直肠癌患者实施了该技术，并将CT检查结果与钡剂灌肠检查结果以及手术切除后的病理结果进行了比较。螺旋CT气钡双重造影在所有病例中均清晰显示原发性肿瘤为强化的软组织肿块，能够检测局部浸润和淋巴结病变，并对肝脏、腹膜及腹部其他部位进行评估。CT比钡剂灌肠更清晰地显示原发性肿瘤的形态，在1例患者中还检测到一个1厘米的息肉，该息肉在钡剂检查中未被发现，因为患者钡剂失禁且视野受限。CT与病理检查结果具有良好的相关性。与钡剂灌肠相比，螺旋CT气钡双重造影速度快，患者不适感最小，无钡剂失禁风险，并且对腹部局部和远处病变有良好的评估。可以进行多平面成像，三维重建可提供腔内和腔外视图。
