数字乳腺X线机与传统乳腺X线机的临床对比

Comparison of Digital Mammography and Film-screen Mammography of Clinic Application

目的初步探讨数字乳腺X线机与传统乳腺X线机的临床应用效果。方法系统回顾2000年6月至12月连续800例使用传统乳腺X线机和2001年1月至8月连续812例使用数字乳腺X线机的临床及影像资料,分别统计各组的摄影体位、曝光次数及检查时间,并将术前诊断与病理对照。结果传统乳腺机组平均摄影体位4.87个/人,平均曝光次数5.16次/人,平均检查时间15.2min/人。数字乳腺机组平均摄影体位4.14个/人,平均曝光次数4.38次/人,平均检查时间5.1min/人。差异均有统计学意义(t值分别为2.147、2.149、16.25,P均<0.05)。病理结果显示传统乳腺机组恶性病变74例,良性病变83例,数字乳腺机组恶性病变71例,良性病变44例。传统乳腺机与数字乳腺机诊断乳腺癌的敏感度、特异度、准确度分别为82.4%、87.3%;80.7%、84.1%;81.5%、86.1%。结论虽然数字乳腺机对乳腺癌诊断的敏感度、特异度和准确度的提高尚不显著,但与传统乳腺机对比,数字乳腺机减少了摄影体位和曝光次数,缩短了检查时间。

Objective To investigate the clinical application of full - field digital mammography（FFDM） and conventional film - screen mammography （FSM） for cancer detection. Methods A review study of 800 patients examined using conventional FSM and 812 patients examined using FFDM was conducted. The number of views and exposes, and the time of examinations were evaluated. The diagnostic results were compared to histopathologic findings in 157 patients for FSM and 115 patients for FFDM. Results The average number of views was 4. 87 vs 4.14 per patient on FSM vs FFDM. The average number of exposures was 5.16 vs 4. 38 per patient on FSM vs FFDM. The average time of examination was 15.2 min vs 5.4 min per patient of FSM vs FFDM. Histopathology revealed 74 malignant tumors and 83 benign lesions in 157 patients of FSF. FFDM detected 71 malignant tumors and 44 benign lsions in 115 patients. Sensitiity, Specificity and accruacy for FFDM vs FSM were 87.3% vs 82. 4% ;84. 1% vs 80. 7% and 86. 1% vs 81.5% ,respectively. The difference in cancer detection rate was not statistically ty, the significant. Conclusion Although there is no significant difference in the sensitivispecificity and accuracy in the cancer detection between FSM and FFDM,the FFDM system reduces number of views and exposes and the time of examination.