Berg W A, Caskey C I, Hamper U M, Kuhlman J E, Anderson N D, Chang B W, Sheth S, Zerhouni E A
Russell H. Morgan Department of Radiology and Radiological Sciences, Johns Hopkins University School of Medicine, Baltimore, Md, USA.
Radiology. 1995 Oct;197(1):45-52. doi: 10.1148/radiology.197.1.7568852.
To evaluate the accuracy of magnetic resonance (MR) and ultrasound (US) criteria for breast implant integrity.
One hundred twenty-two single-lumen silicone breast implants and 22 bilumen implants were evaluated with surface coil MR imaging and US and surgically removed. MR criteria for implant failure were a collapsed implant shell ("linguine sign"), foci of silicone outside the shell ("noose sign"), and extracapsular gel, US criteria were collapsed shell, low-level echoes within the gel, and "snowstorm" echoes of extracapsular silicone.
Among single-lumen implants, MR imaging depicted 39 of 40 ruptures, 14 of 28 with minimal leakage; 49 of 54 intact implants were correctly interpreted. US depicted 26 of 40 ruptured implants, four of 28 with minimal leakage, and 30 of 54 intact implants. Among bilumen implants, MR imaging depicted four of five implants with rupture of both lumina and nine of 10 as intact; US depicted one rupture and helped identify two of 10 as intact. Mammography accurately depicted the status of 29 of 30 bilumen implants with MR imaging correlation.
MR imaging depicts implant integrity more accurately than US; neither method reliably depicts minimal leakage with shell collapse. Mammography is useful in screening bilumen implant integrity.
评估磁共振（MR）和超声（US）用于判定乳房植入物完整性标准的准确性。
对122个单腔硅胶乳房植入物和22个双腔植入物进行表面线圈MR成像和超声评估，然后手术取出。植入物失败的MR标准为植入物外壳塌陷（“细面条征”）、外壳外硅胶灶（“套索征”）和囊外凝胶，超声标准为外壳塌陷、凝胶内低回声以及囊外硅胶的“暴风雪”回声。
在单腔植入物中，MR成像显示40个破裂植入物中的39个，28个有微量渗漏的植入物中的14个；54个完整植入物中的49个被正确解读。超声显示40个破裂植入物中的26个，28个有微量渗漏的植入物中的4个，以及54个完整植入物中的30个。在双腔植入物中，MR成像显示5个两腔均破裂的植入物中的4个，10个完整植入物中的9个；超声显示1个破裂，并帮助确定10个中的2个为完整。乳腺X线摄影在与MR成像相关的情况下准确显示了30个双腔植入物中29个的状态。
MR成像比超声更准确地显示植入物完整性；两种方法都不能可靠地显示伴有外壳塌陷的微量渗漏。乳腺X线摄影对筛查双腔植入物完整性有用。
