MSCT重建、重组层厚对正常肾上腺MPR图像质量的影响
发布时间：2018-07-22 19:09
【摘要】：目的 探讨多层螺旋CT(multi-slice spiral computed tomography，MSCT)重建、重组层厚对正常肾上腺MPR(multiplanar reformatted)图像质量的影响。 材料与方法 使用Somatom64层螺旋CT扫描机对72例行肝脏增强扫描的患者(双侧肾上腺正常)的肾上腺图像进行后处理，，对肾上腺区的原始数据进行不同层厚原始轴位图像进行重建，重建层厚分别为0.6mm、1.0mm、1.5mm、2.0mm，重叠率均为70%；用不同层厚的原始轴位图像进行MPR冠状位重组，重组层厚为0.6mm、1.0mm、1.5mm、2.0mm；应用双盲法评价各组MPR图像质量、测量图像的信噪比（signal-to-noise ratio，SNR）并进行统计学处理。 结果 1.0mm/1.5mm（原始轴位图像重建层厚/MPR图像重组层厚）、1.0mm/2.0mm、1.5mm/2.0mm层厚重建、重组MPR图像的信噪比和图像质量评分高，与其他组间有统计学差异（P0.05），其三组组间无统计学差异（P0.05）。 结论 肾上腺体积小而薄，所以本研究推荐使用1.0mm/1.5mm层厚进行MPR图像重建、重组，能更好观察肾上腺的形态，同时也保证较好的图像质量。
[Abstract]:Objective to investigate the effect of multi-slice spiral computed tomographic CT (MSCT) reconstruction and recombined slice thickness on the image quality of normal adrenal (multiplanar reformatted). Materials and methods the adrenal gland images of 72 patients (bilateral adrenal gland normal) were postprocessed by Somatom 64 slice spiral CT scanner. The original data of the adrenal area were reconstructed by the original axial images with different thickness. The reconstructed layer thickness was 0.6 mm ~ 1.0 mm ~ 1.5 mm ~ 2.0 mm, respectively, and the overlap rate was 70%, respectively, and the MPR coronal reconstruction was carried out with the original axial images of different layers thickness, the reconstructed layer thickness was 0.6 mm ~ 1.0 mm ~ 1.5 mm ~ 2 mm ~ 2.0 mm. The image quality of each group was evaluated by double blind method, and the signal-to-noise ratio (SNR) of the image was measured and processed statistically. Results 1.0mm/1.5mm (original axial image reconstruction layer thickness / MPR reconstruction layer thickness) was 1.0 mm / 2.0 mm and 1.5 mm / 2.0 mm thick. The SNR and image quality score of reconstructed MPR images were higher than those of other groups (P0.05), but there was no statistical difference among the three groups (P0.05). Conclusion the volume of adrenal gland is small and thin, so we recommend the use of 1.0mm/1.5mm slice thickness to reconstruct and reconstruct the adrenal gland, which can better observe the shape of adrenal gland and ensure the better image quality.
【学位授予单位】：泰山医学院
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：R816.6
本文编号：2138284
[Abstract]:Objective to investigate the effect of multi-slice spiral computed tomographic CT (MSCT) reconstruction and recombined slice thickness on the image quality of normal adrenal (multiplanar reformatted). Materials and methods the adrenal gland images of 72 patients (bilateral adrenal gland normal) were postprocessed by Somatom 64 slice spiral CT scanner. The original data of the adrenal area were reconstructed by the original axial images with different thickness. The reconstructed layer thickness was 0.6 mm ~ 1.0 mm ~ 1.5 mm ~ 2.0 mm, respectively, and the overlap rate was 70%, respectively, and the MPR coronal reconstruction was carried out with the original axial images of different layers thickness, the reconstructed layer thickness was 0.6 mm ~ 1.0 mm ~ 1.5 mm ~ 2 mm ~ 2.0 mm. The image quality of each group was evaluated by double blind method, and the signal-to-noise ratio (SNR) of the image was measured and processed statistically. Results 1.0mm/1.5mm (original axial image reconstruction layer thickness / MPR reconstruction layer thickness) was 1.0 mm / 2.0 mm and 1.5 mm / 2.0 mm thick. The SNR and image quality score of reconstructed MPR images were higher than those of other groups (P0.05), but there was no statistical difference among the three groups (P0.05). Conclusion the volume of adrenal gland is small and thin, so we recommend the use of 1.0mm/1.5mm slice thickness to reconstruct and reconstruct the adrenal gland, which can better observe the shape of adrenal gland and ensure the better image quality.
【学位授予单位】：泰山医学院
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：R816.6
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