Daniel B L, Birdwell R L, Black J W, Ikeda D M, Glover G H, Herfkens R J
Department of Radiology, Stanford University Medical Center, Lucas MRS Imaging Center, Stanford, CA 94305-5488, USA.
Acad Radiol. 1997 Jul;4(7):508-12. doi: 10.1016/s1076-6332(97)80238-3.
The authors attempted to determine the accuracy of magnetic resonance (MR) imaging-guided core-needle biopsy performed with a titanium biopsy needle in a breast phantom.
Eight 6-7-mm lesions were created at random positions in a lard breast phantom. Each 0.2-mL lesion contained 0.118 mg of gadopentetate dimeglumine, 0.0025 mL of methylene blue dye, and 23.8 mg of gelatin. Rapid fast spin-echo MR imaging was used to guide placement of a 14-gauge titanium core-biopsy needle. A 1.5-T MR imager was used with an open-platform phased-array breast coil.
Visualization of blue dye in core specimens confirmed successful biopsy in 16 of 16 attempts. One (n = 13) or two (n = 3) passes through the "skin" of the phantom were necessary for biopsy. The needle trajectory was adjusted less than three times for each pass through the "skin" in 15 of 16 biopsies. Cores that contained lesion material were obtained in the first sample in 15 of 16 biopsies. On T1-weighted images, needles cast 7-mm-diameter artifacts.
MR imaging can be used accurately to guide core-needle biopsy of 6-7-mm lesions in a breast phantom.
作者试图确定在乳腺模型中使用钛制活检针进行磁共振（MR）成像引导下的粗针活检的准确性。
在猪油乳腺模型的随机位置创建8个6 - 7毫米的病变。每个0.2毫升的病变包含0.118毫克钆喷酸葡胺、0.0025毫升亚甲蓝染料和23.8毫克明胶。使用快速快速自旋回波MR成像来引导14号钛制粗针活检针的放置。使用1.5-T MR成像仪和开放式相控阵乳腺线圈。
在16次尝试中，芯样中蓝色染料的可视化证实了16次活检均成功。活检需要穿过模型“皮肤”一次（n = 13）或两次（n = 3）。在16次活检中的15次，每次穿过“皮肤”时针轨迹的调整少于三次。在16次活检中的15次，在第一个样本中获得了包含病变材料的芯样。在T1加权图像上，针产生直径7毫米的伪影。
MR成像可准确用于引导乳腺模型中6 - 7毫米病变的粗针活检。
