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光子计数探测器CT用于直肠癌T分期的优化和初始诊断性能

Lina Zhu¹, Lele Zhang¹, Zihao Zhao¹

¹Department of Radiology, The First Affiliated Hospital of Zhengzhou University, No. 1 East Jianshe Rd, Zhengzhou 450052, China.

|November 18, 2025

概括

使用40keV虚拟单能图像和量子代重建水平4的光子计数探测器 (PCD) CT提供最佳的直肠癌T分期图像质量. 这种技术提高了T3-T4分期的诊断性能,与MRI相似,特别是对于经验较少的放射科医生来说.

科学领域:

放射学放射学是一门学科.
医疗成像医学成像
在瘤学瘤学.

背景情况:

结直肠癌 (RC) 的分期对于治疗计划至关重要.
光子计数探测器 (PCD) CT 对RC分期的潜力在很大程度上尚未被探索.
优化PCD CT参数是必要的,以评估其诊断性能.

研究的目的:

使用PCD CT.确定RC T分期的最佳虚拟单能图像 (VMIs) 和量子代重建 (QIR) 强度.
将优化PCD CT的诊断性能与MRI进行RC T分期的比较.

主要方法:

一项前性研究,涉及RC患者接受对比增强的腹部PCDCT和直肠MRI.
用VMIs (40-70 keV) 和不同的QIR水平 (0-4) 重建PCDCT图像.
两个初级和一名高级放射科医生的独立T分期评估;使用DeLong和McNemar测试进行诊断性能比较.

主要成果:

40 keV的VMIs与QIR 4级 (QIR-4) 提供了卓越的图像质量 (SNR,CNR,显眼性,边缘清晰度).
最佳PCDCT改善了初级放射科医生的T3-T4分期性能 (AUC为0.80-0.82与0.64).
最佳PCDCT显示了与MRI可比的诊断性能,用于所有阅读器的整体和T3-T4分期.

结论:

门静脉腹部PCDCT在40keV与QIR-4产生最佳的图像质量RCT分期.
这种优化的PCD CT协议提高了T3-T4分期诊断性能,特别是对于经验较少的放射科医生.
PCD CT显示了与MRI用于直肠癌T分期的诊断性能相似.

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