高海拔地区颈动脉体瘤患者的CT能谱成像研究

目的：探讨CT能谱成像对颈动脉体瘤（CBT）的研究价值。方法：收集30例接受CT能谱检查并经手术确诊的CBT患者，通过GSI Viewer重建60 keV和40 keV单能量图像，对40 keV、60 keV单能量图像及120 kVp like三组图像的CBT供血动脉CT值、背景噪声（SD）、对比噪声比（CNR）、信噪比（SNR）及主观评分进行统计分析，分析CBT能谱参数及影像特征与手术结果的关系。结果：CBT动脉期及静脉期能谱参数与手术结果均无相关性；CBT横径、纵径、Shamblin分型与术中出血量呈强相关，供血动脉数量与术中出血量呈中度相关；横径、纵径、Shamblin分型与颅神经损伤呈中度相关，供血动脉数量与颅神经损伤呈强相关；40 keV是CBT供血动脉显示的最佳能级，CT值、SD、CNR及SNR均显著高于60 keV组及120 kVp like组，60 keV组CT值、噪声显著高于120 kVp like组，二者CNR及SNR差异无统计学意义；40 keV组主观评价分值最高，两位放射科医师主观评分一致性良好。结论：(1) CBT动脉期及静脉期能谱参数与GAPP评分无相关性；...

CT Spectral Imaging Study in Patients with Carotid Body Tumors at High Altitudes

Objective: To investigate the value of CT spectral imaging in the study of carotid body tumors (CBT). Methods: Thirty patients with CBT who underwent CT energy spectrum examination and were confirmed by operation were included. Subsequently, 60 keV and 40 keV single energy images were reconstructed through the GSI viewer. The CT value, background noise (SD), contrast noise ratio (CNR), signal-to-noise ratio (SNR), and subjective score of CBT feeding arteries of the 40 keV, 60 keV single energy images and 120 kVp like images were statistically analyzed to evaluate the relationship between CBT energy spectrum parameters and imaging features with surgical results. Results: There was no correlation between energy spectrum parameters in the arterial and venous phases of CBT and the surgical results. However, CBT transverse diameter, longitudinal diameter, and Shamblin classification were strongly correlated with intraoperative bleeding, and the number of feeding arteries was moderately correlated with intraoperative bleeding. Additionally, the transverse diameter, longitudinal diameter, and Shamblin classification were moderately correlated with cranial nerve injury, and the number of feeding arteries was strongly correlated with cranial nerve injury. We also found that 40 keV was the best energy level for the CBT feeding artery display. Furthermore, the CT value, SD, CNR, and SNR of the 60 keV group were significantly higher than those of the 60 keV and 120 kVp like groups, and the CT value and noise of the 60 keV group were significantly higher than those of the 120 kVp like group. However, there was no significant difference in CNR and SNR between the two groups. The subjective evaluation score of the 40 keV group was the highest, and the subjective evaluation of the two radiologists had good consistency. Conclusion: (1) There was no correlation between the energy spectrum parameters in the arterial and venous phases of CBT and GAPP score. (2) The number of CBT feeding arteries is one of the important parameters for evaluating surgical complications and 40 keV single energy imaging can significantly optimize the display of CBT feeding arteries.