Pletcher Steven D, Hoxworth Joseph M, Goldberg Andrew N, Murr Andrew H, Glastonbury Christine M
Department of Otolaryngology-Head and Neck Surgery, University of California, San Francisco, CA 94143-0342, USA.
Otolaryngol Head Neck Surg. 2008 Jun;138(6):710-4. doi: 10.1016/j.otohns.2008.03.001.
To evaluate the image quality of coronal reformatted CT images compared with direct coronal CT images.
Cross-sectional.
Patients who underwent paranasal sinus CT scans using both direct coronal images (DC) and axially acquired images with coronal reconstructions (CR) were consecutively enrolled. Two reconstruction groups were evaluated: group CR1 with 1-mm axial collimation and group CR2 with 0.625-mm axial collimation. Scans were presented in a randomized, blinded fashion to two sinus surgeons and a neuroradiologist.
When compared with CR1, DC images had higher image quality for each of five key anatomic landmarks (P < .0001). DC images were more likely to be adequate preoperative imaging (P < .0001). When compared with CR2, improved DC image quality was noted in the majority of key anatomic landmarks. No difference was noted in the "adequacy rating" between the DC and CR2 (0.625 mm) protocols.
The 0.625-mm reformatted images were judged to be adequate preoperative imaging. The additional information provided by multiple-image planes make reformatted 0.625-mm axial images an acceptable approach.
评估冠状位重组CT图像与直接冠状位CT图像的图像质量。
横断面研究。
连续纳入接受鼻旁窦CT扫描的患者，扫描方式包括直接冠状位图像（DC）和轴向采集图像并进行冠状位重组（CR）。评估两个重组组：CR1组轴向准直为1mm，CR2组轴向准直为0.625mm。扫描图像以随机、盲法的形式呈现给两名鼻窦外科医生和一名神经放射科医生。
与CR1组相比，DC图像在五个关键解剖标志点的图像质量均更高（P < 0.0001）。DC图像更有可能作为充分的术前影像（P < 0.0001）。与CR2组相比，大多数关键解剖标志点的DC图像质量有所改善。DC与CR2（0.625mm）方案在“充分性评级”上无差异。
0.625mm的重组图像被判定为充分的术前影像。多层面图像提供的额外信息使0.625mm轴向重组图像成为一种可接受的方法。
