Objective To observe the results of the metasta sis of spinal vertebra treated by rep lacedment with the adjustable hollo w artificial vertebral body.Method An adjustable hollow artificial vertebral body made from med...Objective To observe the results of the metasta sis of spinal vertebra treated by rep lacedment with the adjustable hollo w artificial vertebral body.Method An adjustable hollow artificial vertebral body made from medial used titanium.12pat ients with the metastasis of vertebral body were treated by this technique.The relief of the pain of function of s pinal cord were moinitored.The stability of the operated segments was observed.Results The patients were followed up from 6t o 34months.The neurological functi ons were improved markedly,esp.for the pain re-lieving.The implants were stalbe and the reconstruction of the segment h ighness was observed on the X-ray fil ms.Conclusion The height of anterior column and the stability of the operated segments can be reconstructed by implanting the adjustable hollow artificial vertebral body.T his technique may be an alternative meth od for the management of the metastasis in spinal vertebral body.展开更多
目的探索层面编码金属伪影校正结合视角倾斜(slice-encoding metal artifact corrections-view-angle tilting,SEMAC-VAT)技术能否减少3D打印人工椎体脊柱重建术术后成像中金属伪影的影响。材料与方法于2020年3月至2020年9月期间在北京...目的探索层面编码金属伪影校正结合视角倾斜(slice-encoding metal artifact corrections-view-angle tilting,SEMAC-VAT)技术能否减少3D打印人工椎体脊柱重建术术后成像中金属伪影的影响。材料与方法于2020年3月至2020年9月期间在北京大学第三医院前瞻性招募了17名行3D打印人工椎体脊柱重建术的患者行T2加权SEMAC-VAT序列及T2加权快速自旋回波(turbo-spin-echo,TSE)序列成像。由两名影像诊断医师对图像进行评估对比,包括:金属伪影大小、信噪比(signal-to-noise ratio,SNR),以及人工椎体周围关键解剖结构的可见度。变量的对比采用配对样本t检验、独立样本t检验以及秩和检验。采用Kappa系数评估观察者间一致性。结果与T2加权TSE序列相比,SEMAC-VAT序列可以显著减小伪影的前后径[(3.1±7.5)mm vs.(9.0±9.1)mm,P<0.01]和上下径[(4.8±6.3)mm vs.(15.4±14.5)mm,P<0.01],显著提高人工椎体周围椎间孔、神经根,以及骨-金属交界的可见度(P均<0.05)。椎管的可见度在两种序列中可见度相当(P=1.000)。SEMAC-VAT序列的图像SNR显著低于TSE序列(P均<0.05)。结论在3 T MRI中,SEMAC-VAT序列成像可以有效减轻3D打印金属椎体伪影,可改善大部分3D打印人工椎体周围解剖结构可见度,可能有助于提高3D打印人工椎体脊柱重建术术后MRI的诊断效能。展开更多
文摘Objective To observe the results of the metasta sis of spinal vertebra treated by rep lacedment with the adjustable hollo w artificial vertebral body.Method An adjustable hollow artificial vertebral body made from medial used titanium.12pat ients with the metastasis of vertebral body were treated by this technique.The relief of the pain of function of s pinal cord were moinitored.The stability of the operated segments was observed.Results The patients were followed up from 6t o 34months.The neurological functi ons were improved markedly,esp.for the pain re-lieving.The implants were stalbe and the reconstruction of the segment h ighness was observed on the X-ray fil ms.Conclusion The height of anterior column and the stability of the operated segments can be reconstructed by implanting the adjustable hollow artificial vertebral body.T his technique may be an alternative meth od for the management of the metastasis in spinal vertebral body.
文摘目的探索层面编码金属伪影校正结合视角倾斜(slice-encoding metal artifact corrections-view-angle tilting,SEMAC-VAT)技术能否减少3D打印人工椎体脊柱重建术术后成像中金属伪影的影响。材料与方法于2020年3月至2020年9月期间在北京大学第三医院前瞻性招募了17名行3D打印人工椎体脊柱重建术的患者行T2加权SEMAC-VAT序列及T2加权快速自旋回波(turbo-spin-echo,TSE)序列成像。由两名影像诊断医师对图像进行评估对比,包括:金属伪影大小、信噪比(signal-to-noise ratio,SNR),以及人工椎体周围关键解剖结构的可见度。变量的对比采用配对样本t检验、独立样本t检验以及秩和检验。采用Kappa系数评估观察者间一致性。结果与T2加权TSE序列相比,SEMAC-VAT序列可以显著减小伪影的前后径[(3.1±7.5)mm vs.(9.0±9.1)mm,P<0.01]和上下径[(4.8±6.3)mm vs.(15.4±14.5)mm,P<0.01],显著提高人工椎体周围椎间孔、神经根,以及骨-金属交界的可见度(P均<0.05)。椎管的可见度在两种序列中可见度相当(P=1.000)。SEMAC-VAT序列的图像SNR显著低于TSE序列(P均<0.05)。结论在3 T MRI中,SEMAC-VAT序列成像可以有效减轻3D打印金属椎体伪影,可改善大部分3D打印人工椎体周围解剖结构可见度,可能有助于提高3D打印人工椎体脊柱重建术术后MRI的诊断效能。