Voorhies R M, Engel I, Gamache F W, Patterson R H, Fraser R A, Lavyne M H, Schneider M
Neurosurgery. 1983 Feb;12(2):189-94. doi: 10.1227/00006123-198302000-00010.
Intraoperative ultrasonography is a potentially useful tool for the neurosurgeon faced with the task of finding and removing small subcortical brain tumors. With the B-mode real-time sector scan equipment now available, satisfactory images of the intracranial contents can be obtained. Others have reported obtaining images by applying the transducer directly to the dura mater or cortex. This carries the risk of pressure damage to the brain. Furthermore, the presence of acoustical noise in the region close to the transducer results in poor image resolution in the superficial region of the cortex. To circumvent these two problems, we have used a saline-filled cylinder placed over the craniotomy site to achieve acoustical coupling. This technique also increases the area of cortex visualized by the pie-shaped beam of the sector scan by separating the transducer from the brain surface.
术中超声检查对于面临寻找和切除小的皮质下脑肿瘤任务的神经外科医生来说是一种潜在有用的工具。利用现在可用的B型实时扇形扫描设备，可以获得颅内结构的满意图像。其他人报告过通过将换能器直接应用于硬脑膜或皮质来获取图像。这存在对脑造成压力损伤的风险。此外，在靠近换能器的区域存在声学噪声会导致皮质浅表区域的图像分辨率较差。为了规避这两个问题，我们使用了一个充满生理盐水的圆柱体放置在开颅部位上方以实现声学耦合。该技术还通过将换能器与脑表面分开，增加了扇形扫描的扇形波束所显示的皮质区域。
