数字断层融合技术对肺内非钙化性结节灶检出能力评价

Assessment on the detectability of non-calcified pulmonary nodules with chest digital tomosynthesis

目的探讨胸部数字断层融合摄影(DTS)与常规数字X线摄影(CDR)对肺部非钙化结节的检出能力。方法对41例肺内非钙化结节患者行胸部DTS和CDR检查,以MDCT结果作为参照,分析胸部DTS和CDR对肺内不同直径的非钙化结节性病灶的显示结果。结果 41例患者经CT发现260个结节,胸部DTS发现238个,CDR发现74个。胸部DTS和CDR对直径3～5mm、6～10mm及>10mm肺部非钙化结节的敏感度分别是86.36%(114/132)、95.60%(87/91)、100%(37/37)和10.61%(14/132)、37.36%(34/91)、70.27%(26/37)。对于直径≤10mm的肺部非钙化结节,胸部DTS的检出能力明显优于CDR(P<0.01)。CDR对肺内非钙化结节性病灶总的敏感度为28.46%(74/260),胸部DTS则为91.54%(238/260),二者差异有统计学意义(P<0.01)。结论对于检出肺部非钙化结节,胸部DTS比CDR更具优势,敏感度更高,特别对于直径≤10mm的非钙化结节。

Objective To compare chest digital tomosynthesis （DTS） with convenlional digital radiography （CDR） in the detection of non-calcified puImonary nodules. Methods Totally 41 patients whb non-calclfied pulmonary nodules were examined with chest DTS and CDR. Taking MSCT findings as references, the sensitivity of chest DTS and CDR for detection of non-calcified pulmonary nodules were calculated and compared. Results CT showed 260 nodules in 41 patients, while chest DTS found 238 nodules and CDR found 74 nodules. The sensitivity for chest DTS for 3 groups nodules （3 5. 6-10 mm, 〉10 mm） was 86.36% （114/132）, 95.60% （87/91）, 100% （37/37）, respectively, while for CDR was 10.61% （14/132）, 37.36% （34/91）, 70.27% （26/37）, respectively. For nodules with diameter 410 ram, chest DTS could detect more lesions than CDR （P〈0. 01）. The total sensitivity for CDR was 28. 46% （74/260）, for DTS was 91.54% （238/260）, there was statistical difference （P〈0.01）. Conclusion For the detection of non-calcified puimonary nodules, chest DTS is better than CDR, especially for non calcified nodules less than 10 mm.