尘肺的CT诊断与X线普通胸片及高千伏胸片比较

Comparison CT Scan, Ordinary Chest Radiograph and High Kilovoltage Chest Radiograph in the Diagnosis of Pneumoconiosis

为了进一步探讨CT对尘肺的诊断价值,对47例不同粉尘引起的各期尘肺作了胸部CT扫描,X线普通胸片及高千伏胸片并进行了比较。结果表明:对0^+——Ⅰ期尘肺薄层CT较普通CT为好,它显示小阴影形态结构清楚。不规则小阴影的检出中高千伏胸片优于普通陶片。对Ⅱ—Ⅲ期尘肺的观察,CT显著优于胸片,提高检出够诊断Ⅲ期尘肺的大阴影27.6％。CT较胸片提高肺大泡检出率36％,提高胸膜增厚检出率25％。

In order to evaluate the practical use ofCT in the diagnosis of pneumoconiosis, 47cases of pneumoconiosis of various stagescaused by different kinds of dust were examinedwith three different methods--CT scan, or-dinary chest radiograph and high kilovoltagechest radiograph. The results were compared-with one another. For stage 0^+--Ⅰ of pneumo-coniosis, thinner slice scan could identifysmall opacities more clearly than 10mm slicescan, high kilovoltage chest radiograph wasbetter than ordinary chest radiograph in de-tecting irrgular small opacities. For stage Ⅱ--Ⅲ of pneumoconiosis, the yield rate were27.6% higher for large opcities with CT scanthan that of chest radiograph. In comparisonwith ordinary chest radiograph, CT can alsoincrease the yield rate of the focal emphy-sema and plueral thickening by 360% and 25%respectively.