Schmitt E L, Threatt B A
J Can Assoc Radiol. 1985 Dec;36(4):304-7.
Non-visualization of the retromammary space and ribs has been a source of concern to mammographers. In six years, 186 cancers were detected in our experience of 10 034 self-referred asymptomatic women at the University of Michigan Breast Cancer Detection Demonstration Project. These cancers were used to analyze the need to visualize the retromammary space and ribs, or both sites, if adequate technical factors were used. All the cancers were analyzed for position on the film, number of films required for visualization, relationship of the tumor to the posterior edge of the film, number of occult tumors, tumor size, histologic type, sensitivity of detection method and the number of interval cancers. Of the 186 cancers, 168 (90%) were detected on mammograms. All of the cancers were visualized on the mediolateral view; three were not visualized on the craniocaudal view. Six per cent of the cancers were within 1 cm of the posterior edge of the film; the remaining 94% were located more anteriorly in the breast. The imaged tumors were smaller and had a significantly higher percentage of non-invasive cancers than found in a symptomatic clinical population. Therefore, mammography, using proper technique, will consistently permit visualization of cancer in the breast, regardless of tumor size, histologic type, or location in the breast.
乳腺后间隙和肋骨显示不清一直是乳腺造影技师关注的问题。在密歇根大学乳腺癌检测示范项目中，我们对10034名自行前来检查的无症状女性进行了六年的检查，共检测出186例癌症。如果采用了足够的技术因素，这些癌症被用来分析显示乳腺后间隙和肋骨或两者的必要性。对所有癌症进行了以下分析：在胶片上的位置、显示所需的胶片数量、肿瘤与胶片后缘的关系、隐匿性肿瘤的数量、肿瘤大小、组织学类型、检测方法的敏感性以及随访期癌症的数量。在这186例癌症中，168例（90%）在乳腺造影片上被检测到。所有癌症在内外侧位片上均能显示；3例在头尾位片上未显示。6%的癌症位于胶片后缘1厘米范围内；其余94%位于乳腺更靠前的位置。与有症状的临床人群相比，成像的肿瘤较小，非浸润性癌症的比例明显更高。因此，采用适当技术的乳腺造影术，无论肿瘤大小、组织学类型或在乳腺中的位置如何，都能始终显示乳腺中的癌症。
