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首页> 外文期刊>Veterinary Ophthalmology >Computed tomographic-dacryocystography (CT-DCG) of the normal canine nasolacrimal drainage system with three-dimensional reconstruction
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Computed tomographic-dacryocystography (CT-DCG) of the normal canine nasolacrimal drainage system with three-dimensional reconstruction

机译：三维重建的正常犬鼻泪道引流系统计算机断层扫描-泪囊成像（CT-DCG）

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The aims of the study were (1) to quantify the influence of selected imaging parameters on the image quality (slice thickness, mAs, and beam orientation) defining optimal conditions for scan protocols and (2) to evaluate the benefits of the 3D reconstruction techniques for visualization of NDS structures in dogs. CT-DCG was performed bilaterally in 32 heads of dogs. CT transverse images were obtained using a combination of two slice thickness values (0.8 mm and 2 mm) and two mAs values (50 mAs and 300 mAs). Two beam projection orientations were also tested: transverse plane (perpendicular to the hard palate) and oblique to the hard palate. Three-dimensional images were obtained using Volume Rendering (VR). Transverse beam projection proved to be superior for the assessment of the inferior and superior lacrimal canaliculi and lacrimal sac. In this study, there was no statistical difference regarding mAs values (50 mAs and 300 mAs) and slice thickness values (0.8 mm and 2 mm). Three-dimensional images were helpful for the assessment of topographic relationship between nasolacrimal structures and cranial landmarks.
机译：该研究的目的是（1）量化所选成像参数对定义扫描协议最佳条件的图像质量（切片厚度，mAs和光束方向）的影响，以及（2）评估3D重建技术的益处用于可视化狗的NDS结构。 CT-DCG在32只狗的双侧进行。使用两个切片厚度值（0.8 mm和2 mm）和两个mAs值（50 mAs和300 mAs）的组合获得CT横向图像。还测试了两个光束投影方向：横切面（垂直于硬pa）和倾斜于硬pa。使用体积渲染（VR）获得三维图像。横束投影被证明在评估泪小管和泪小管和泪囊方面是优越的。在这项研究中，mAs值（50 mAs和300 mAs）和切片厚度值（0.8 mm和2 mm）没有统计学差异。三维图像有助于评估鼻泪结构与颅骨标志之间的地形关系。

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