Air trapping in children: Evaluation with dynamic lung densitometry with spiral CT
Air trapping in children: Evaluation with dynamic lung densitometry with spiral CT
复制标题
DOI：
10.1148/radiology.206.1.9423657
复制
发表时间：
1998-01-01
期刊：
影响因子：
19.7
通讯作者：
Mahboubi, S
中科院分区：
文献类型：
--
作者：
Johnson, JL;Kramer, SS;Mahboubi, S
目得：为了评估一个简单的方法，动态肺密度测定与螺旋计算机断层扫描（CT），以区分空气潴留代偿性过度充气在children.MATERIALS和METHODS：8名儿童（平均年龄，4岁2个月）谁曾在胸部X线片上的透亮线局灶性地区进行了螺旋CT（5秒采集时间，固定表的位置）在安静呼吸的可行性。用0.7秒时间重叠扫描重建数据。结果：在空气潴留的儿童（n = 5）中，高透光区域的平均肺衰减（+/- 1标准差）为-815 HU +- 52，平均呼吸偏移为28 HU +/- 7。在代偿性过度充气患者（n = 4）中，平均肺衰减为-664 HU +/- 31，呼吸偏移为84 HU +/- 15。差异具有统计学意义（平均衰减P = 0.001：P
PURPOSE: To evaluate the feasibility of the use of a simple method of dynamic lung densitometry with spiral computed tomography (CT) to differentiate air trapping from compensatory hyperinflation in children.MATERIALS AND METHODS: Eight children (mean age, 4 years 2 months) who had focal areas of radiolucency on chest radiographs underwent spiral CT (5-second acquisition time, fixed table position) during quiet breathing. Data were reconstructed with 0.7-second temporally overlapping scans. Lung attenuation in selected regions of interest was plotted against time.RESULTS: In children with air trapping (n = 5), mean lung attenuation (+/- 1 standard deviation) in hyperlucent regions was -815 HU +- 52, and mean respiratory excursion was 28 HU +/- 7. In patients with compensatory hyperinflation (n = 4), mean lung attenuation was -664 HU +/- 31, and respiratory excursion was 84 HU +/- 15. The differences were statistically significant (P = .001 for mean attenuation: P