一站式多能量胰腺动态体积 perfusion 成像使用光子计数探测器 CT:初步经验
Yanzhao Yang1, Naiyi Zhu1, Huimin Lin1
1Department of Radiology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
一个新的胰腺虚拟单能双能CT (VPCT) 协议为胰腺导管腺癌 (PDAC) 的检测和特征提供了高质量的成像. 这种方法为PDAC分化和分级提供了宝贵的见解,有助于临床管理.
科学领域:
- 放射学 放射学是一门学科.
- 在瘤学瘤学.
- 医疗成像医学成像
背景情况:
- 胰腺管道腺癌 (PDAC) 诊断严重依赖于成像.
- 当前的成像技术在全面的形态和功能评估中可能存在局限性.
- 使用光子计数CT (PCCT) 开发了一种新的多能VPCT协议.
研究的目的:
- 评估使用PCCT修改的一站式多能胰腺VPCT协议的初始经验.
- 评估其对PDAC的综合形态分析和功能 perfusion 评估的能力.
- 确定其在区分PDAC和评估组织病理学分级方面的有效性.
主要方法:
- 预期招募患有疑似PDAC的参与者,接受手术前胰腺动态VPCT.
- 在55和70keV时提取单相图像和虚拟单能图像 (VMIs).
- 诊断图像质量的定量和主观评估.
- 产生和分析透图,比较PDAC病变和正常膜之间的参数,以及PDAC分化度之间的参数.
- 记录辐射剂量. 记录辐射剂量.
主要成果:
- 该方案包括65名PDAC确诊的参与者,达到平均有效辐射剂量为16.4 ± 4.5mSv.
- 55 keV的VMI显示出最高的对比度与噪声比率 (CNR) 和优异的损伤明显性.
- perfusion 参数 (BF,BV,TTD 等) 的显著差异 在PDAC病变和正常腹膜瘤之间观察到 (p < 0.05).
- 与差异化不良的病变相比,差异化不良的PDAC显示了明显较低的BF,BV,TTD和Tmax (p <0.05).
结论:
- 使用PCCT的一站式,多能量胰腺VPCT协议使高质量的形态成像和可靠的功能性输液评估成为可能.
- 该协议实现了降低辐射剂量,同时提供了对PDAC分化和组织病理学分级的宝贵见解.
- 这种方法有可能改善PDAC的临床管理.
更多相关视频
10:21Continuous Blood Sampling in Small Animal Positron Emission Tomography/Computed Tomography Enables the Measurement of the Arterial Input Function
Published on: August 8, 2019
11:09High-Resolution Cardiac Positron Emission Tomography/Computed Tomography for Small Animals
Published on: December 16, 2022
相关概念视频
Positron Emission Tomography
One of the main requirements of a PET scan is a positron-emitting radioisotope, which is produced in a cyclotron and then attached to a substance used by the part of the body...
Radiological Investigation III: Pulmonary Angiogram and PET Scan
Pulmonary Angiogram
A Pulmonary Angiogram is an invasive procedure involving injecting a contrast medium through a catheter threaded into the pulmonary artery or the right side of the heart to visualize the pulmonary vasculature. Computed Tomography (CT) scans have mainly replaced this...
Radiological Investigation II: MRI and Ventilation Perfusion Scan
Magnetic Resonance Imaging (MRI) and Ventilation Perfusion Scans are two radiological investigations that offer detailed diagnostic images of the body, particularly lung structures.
MRI
MRI uses magnetic fields and radiofrequency signals to distinguish between normal and abnormal tissues. This technology provides a more detailed diagnostic image than CT scans, enabling it to characterize pulmonary nodules, stage bronchogenic carcinoma, and evaluate inflammatory activity in...
Imaging Studies II: Positron Emission Tomography and Scintigraphy
Fundamental Principles of PET
