The most common methods for three-dimensional reconstruction of peripheral nerve fascicles include histological and radiology techniques. Histological techniques have many drawbacks including an enormous manual worklo...The most common methods for three-dimensional reconstruction of peripheral nerve fascicles include histological and radiology techniques. Histological techniques have many drawbacks including an enormous manual workload and poor image registration. Micro-magnetic resonance imaging（Micro-MRI）, an emerging radiology technique, has been used to report results in the brain, liver and tumor tissues. However, micro-MRI usage for obtaining intraneural structures has not been reported. The aim of this study was to present a new imaging method for three-dimensional reconstruction of peripheral nerve fascicles by ~1T micro-MRI. Freshly harvested sciatic nerve samples from an amputated limb were divided into four groups. Two different scanning conditions（Mannerist Solution/GD-DTPA contrast agent, distilled water） were selected, and both T1 and T2 phases programmed for each scanning condition. Three clinical surgeons evaluated the quality of the images via a standardized scale. Moreover, to analyze deformation of the two-dimensional image, the nerve diameter and total area of the micro-MRI images were compared after hematoxylin-eosin staining. The results show that rapid micro-MRI imaging method can be used for three-dimensional reconstruction of the fascicle structure. Nerve sample immersed in contrast agent（Mannerist Solution/GD-DTPA） and scanned in the T1 phase was the best. Moreover, the nerve sample was scanned freshly and can be recycled for other procedures. MRI images show better stability and smaller deformation compared with histological images. In conclusion, micro-MRI provides a feasible and rapid method for three-dimensional reconstruction of peripheral nerve fascicles, which can clearly show the internal structure of the peripheral nerve.展开更多
Fluoro-ruby was injected into the posterior funiculus of the spinal cord in the cervical （C5-T2） and lumbar （L3-6） segments of adult guinea pigs. The spinal cord was cut into serial frozen sections. The Fluoro-rub...Fluoro-ruby was injected into the posterior funiculus of the spinal cord in the cervical （C5-T2） and lumbar （L3-6） segments of adult guinea pigs. The spinal cord was cut into serial frozen sections. The Fluoro-ruby labeling was clearly delineated from the surrounding structure. The labeling traversed the cervical, thoracic and lumbar segments, and was located on the ventral portion of the posterior funiculus on the injected side, proximal to the intermediate zone of the dorsal gray matter. The fluorescence area narrowed rostro-caudally. The spinal cord, spinal cord gray matter and corticospinal tract were reconstructed using 3D-DOCTOR 4.0 software, resulting in a robust three-dimensional profile. Using functionality provided by the reconstruction software, free multi-angle observation and sectioning could be conducted on the spinal cord and corticospinal tract. Our experimental findings indicate that the Fluoro-ruby retrograde fluorescent tracing technique can accurately display the anatomical location of corticospinal tract in the guinea pig and that three-dimensional reconstruction software can be used to provide a three-dimensional image of the corticospinal tract.展开更多
目的:研究困难气道中运用CT三维重建技术指导硬质纤维气管镜行气管插管的效果。方法:选择美国麻醉医师协会(American Society of Anesthesiologists,ASA)分级Ⅰ~Ⅱ级、颈项强直、颈部外伤需制动或严重颈椎病颈椎固定的择期手术患者44例...目的:研究困难气道中运用CT三维重建技术指导硬质纤维气管镜行气管插管的效果。方法:选择美国麻醉医师协会(American Society of Anesthesiologists,ASA)分级Ⅰ~Ⅱ级、颈项强直、颈部外伤需制动或严重颈椎病颈椎固定的择期手术患者44例,随机分为两组,试验组(E组)24例和对照组(C组)20例。术前采集入组患者上气道CT数据,依据患者的CT三维重建图像及由此获得的参数计算完成对Shikani硬质纤维气管镜(后简称硬质镜)管芯塑型,随机分组后,根据患者所在组别分别选用相应的硬质镜插管,E组采用根据患者CT三维重建图像计算的角度塑型后的硬质镜,C组采用原始角度硬质镜,并记录首次插管成功率及气管插管成功率,气管插管时间,入室(Tb)、插管后即刻(T0)、插管后5 min内(T1~T5)7个时间点血压、心率和脉搏氧饱和度,以及24 h内气管插管相关并发症。结果:两组插管成功率均为100%,E组首次插管成功率为96%,C组首次插管成功率为70%,E组首次插管成功率高于C组。E组插管时间为(20.7±10.6)s,C组插管时间为(21.5±17.6)s,E组优于C组,但差异无统计学意义(P>0.05)。插管操作对血流动力学影响方面,E组心率血压乘积(rate-pressure product,RPP)在T0、T1、T2、T4、T5小于C组,但差异无统计学意义(P>0.05),两组气管插管相关并发症差异无统计学意义(P>0.05)。结论:依据CT三维重建技术图像计算的角度对硬质镜管芯塑型,对提高颈椎固定困难气道患者的首次气管插管成功率具有一定指导意义。展开更多
基金supported by grants from the National Key Research and Development Plan of China,No.31670986(to QTZ)the Science and Technology Project of Guangdong Province of China,No.2014B020227001,2017A050501017(to QTZ)the Science and Technology Project of Guangzhou of China,No.201807010082(to QTZ),201704030041(to JQ)
文摘The most common methods for three-dimensional reconstruction of peripheral nerve fascicles include histological and radiology techniques. Histological techniques have many drawbacks including an enormous manual workload and poor image registration. Micro-magnetic resonance imaging（Micro-MRI）, an emerging radiology technique, has been used to report results in the brain, liver and tumor tissues. However, micro-MRI usage for obtaining intraneural structures has not been reported. The aim of this study was to present a new imaging method for three-dimensional reconstruction of peripheral nerve fascicles by ~1T micro-MRI. Freshly harvested sciatic nerve samples from an amputated limb were divided into four groups. Two different scanning conditions（Mannerist Solution/GD-DTPA contrast agent, distilled water） were selected, and both T1 and T2 phases programmed for each scanning condition. Three clinical surgeons evaluated the quality of the images via a standardized scale. Moreover, to analyze deformation of the two-dimensional image, the nerve diameter and total area of the micro-MRI images were compared after hematoxylin-eosin staining. The results show that rapid micro-MRI imaging method can be used for three-dimensional reconstruction of the fascicle structure. Nerve sample immersed in contrast agent（Mannerist Solution/GD-DTPA） and scanned in the T1 phase was the best. Moreover, the nerve sample was scanned freshly and can be recycled for other procedures. MRI images show better stability and smaller deformation compared with histological images. In conclusion, micro-MRI provides a feasible and rapid method for three-dimensional reconstruction of peripheral nerve fascicles, which can clearly show the internal structure of the peripheral nerve.
基金supported by a grant from the Priority Academic Program Development of Jiangsu Higher Education Institutions
文摘Fluoro-ruby was injected into the posterior funiculus of the spinal cord in the cervical （C5-T2） and lumbar （L3-6） segments of adult guinea pigs. The spinal cord was cut into serial frozen sections. The Fluoro-ruby labeling was clearly delineated from the surrounding structure. The labeling traversed the cervical, thoracic and lumbar segments, and was located on the ventral portion of the posterior funiculus on the injected side, proximal to the intermediate zone of the dorsal gray matter. The fluorescence area narrowed rostro-caudally. The spinal cord, spinal cord gray matter and corticospinal tract were reconstructed using 3D-DOCTOR 4.0 software, resulting in a robust three-dimensional profile. Using functionality provided by the reconstruction software, free multi-angle observation and sectioning could be conducted on the spinal cord and corticospinal tract. Our experimental findings indicate that the Fluoro-ruby retrograde fluorescent tracing technique can accurately display the anatomical location of corticospinal tract in the guinea pig and that three-dimensional reconstruction software can be used to provide a three-dimensional image of the corticospinal tract.
文摘目的:研究困难气道中运用CT三维重建技术指导硬质纤维气管镜行气管插管的效果。方法:选择美国麻醉医师协会(American Society of Anesthesiologists,ASA)分级Ⅰ~Ⅱ级、颈项强直、颈部外伤需制动或严重颈椎病颈椎固定的择期手术患者44例,随机分为两组,试验组(E组)24例和对照组(C组)20例。术前采集入组患者上气道CT数据,依据患者的CT三维重建图像及由此获得的参数计算完成对Shikani硬质纤维气管镜(后简称硬质镜)管芯塑型,随机分组后,根据患者所在组别分别选用相应的硬质镜插管,E组采用根据患者CT三维重建图像计算的角度塑型后的硬质镜,C组采用原始角度硬质镜,并记录首次插管成功率及气管插管成功率,气管插管时间,入室(Tb)、插管后即刻(T0)、插管后5 min内(T1~T5)7个时间点血压、心率和脉搏氧饱和度,以及24 h内气管插管相关并发症。结果:两组插管成功率均为100%,E组首次插管成功率为96%,C组首次插管成功率为70%,E组首次插管成功率高于C组。E组插管时间为(20.7±10.6)s,C组插管时间为(21.5±17.6)s,E组优于C组,但差异无统计学意义(P>0.05)。插管操作对血流动力学影响方面,E组心率血压乘积(rate-pressure product,RPP)在T0、T1、T2、T4、T5小于C组,但差异无统计学意义(P>0.05),两组气管插管相关并发症差异无统计学意义(P>0.05)。结论:依据CT三维重建技术图像计算的角度对硬质镜管芯塑型,对提高颈椎固定困难气道患者的首次气管插管成功率具有一定指导意义。
