Lang S, Jäger L, Grevers G
Klinik und Poliklinik für Hals-, Nasen- und Ohrenkranke, Germany.
Laryngorhinootologie. 2002 Jun;81(6):418-21. doi: 10.1055/s-2002-32212.
Before sinus surgery, computed tomography (CT) of the paranasal sinuses and anterior skull base is a standard procedure in the diagnostic evaluation. However, coronal sections necessary for the analysis of the complex anatomy of this region are often not applicable in multiple injured or elderly patients due to the impossibility to maintain the required position for the coronal scans. Secondary coronal reconstruction of primary axially acquired scans could help to overcome this problem. This technique was, however, hampered so far by an insufficient resolution in case of conventional CT. We therefore compared the quality of primary coronally acquired conventional CT images with the resolution of multiplanar reformatted coronal images of primary axially acquired scans by means of a new CT generation, the Multidetector Computed Tomography (MDCT).
10 patients were each examined with conventional CT or MDCT respectively. The quality of primary coronally acquired conventional scans (CT) versus secondary coronal reconstructions (MDCT) was compared by evaluating typical anatomic landmarks.
As compared to conventional CT, the coronal reconstruction of primary axially acquired scans by means of MDCT revealed an equal resolution and additionally no essential impairment by amalgam artefacts.
Our results demonstrate the excellent quality of secondary coronal reconstructions by means of MDCT in the CT evaluation of the paranasal sinuses and the anterior skull base as compared to primary coronally acquired images via conventional CT.
在鼻窦手术前，鼻窦和前颅底的计算机断层扫描（CT）是诊断评估中的标准程序。然而，由于无法保持冠状位扫描所需的体位，对于该区域复杂解剖结构分析所必需的冠状位图像，在多处受伤或老年患者中往往无法获取。对轴位采集的原始扫描进行冠状位重建有助于解决这一问题。然而，到目前为止，在传统CT检查中，这种技术因分辨率不足而受到限制。因此，我们通过新一代CT——多排螺旋计算机断层扫描（MDCT），比较了直接冠状位采集的传统CT图像与轴位采集的原始扫描经多平面重组后的冠状位图像的分辨率。
分别对10例患者进行传统CT或MDCT检查。通过评估典型的解剖标志，比较直接冠状位采集的传统扫描（CT）与冠状位重建（MDCT）的质量。
与传统CT相比，通过MDCT对轴位采集的原始扫描进行冠状位重建，显示出相同的分辨率，并且没有因汞合金伪影造成的明显损害。
我们的结果表明，与通过传统CT直接冠状位采集的图像相比，在鼻窦和前颅底的CT评估中，通过MDCT进行冠状位重建的质量非常好。
