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在PET-CT引领下,PET-MRI的出现成为高敏感性和特异性的生物医学影像技术领域的又一个里程碑。尽管PET-CT在临床实践中已经得到了广泛应用,但与PET-MRI相比,存在两个缺点:①PET-CT没有实现真正的同步数据采集,患者的医疗照射剂量较高,而PET-MRI能够实现同步数据采集,同时免除了CT部分的辐射剂量;②MRI可以得到高分辨率和对比度的软组织图像,以及进行波谱分析和功能显像,而CT不行。所以,PET-MRI与PET-CT相比具有明显的优势,PET-MRI技术的发展最终会体现在临床应用上。
PET-MRI和多模式肿瘤显像
PET-MRI and multimodal cancer imaging
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摘要: 多模式融合显像已成为临床应用的发展趋势,特别是PET-CT的出现,为临床影像引入了新的观点。事实证明,PET-CT无论在临床诊断还是实验研究中都极具价值,但PET-CT也存在一些不足,主要表现为CT显示软组织的对比度低及对患者会产生一定的辐射剂量,而MRI可以克服CT的这些缺点,其拥有完美的软组织对比度,时间、空间分辨率高,没有辐射危害,MRI本身还可以提供功能信息,因此相信,PET-MRI会在一定程度上替代PET-CT成为多模式肿瘤显像新的发展方向。
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关键词:
- 肿瘤 /
- 磁共振成像 /
- 正电子发射断层显像术 /
- 体层摄影术,X线计算机 /
- 图像融合
Abstract: Multimodality imaging, specifically PET-CT, brought a new perspective into the fields of clinical imaging.Clinical cases have shown that PET-CT has great value in clinical diagnosis and experimental reaserch.But PET-CT still bears some limitations.A major drawback is that CT provides only limited soft tissue contrast and exposes the patient to a significant radiation dose.MRI overcome these limitations, it has excellent soft tissue contrast, high temporal and spatial resolution and no radiation damage.Additionally, since MRI provides also functional information, PET-MRI will show a new direction of multimodality imaging in the future. -
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