外部通用性的挑战:来自Ga-PSMA-11PET基于放射学签名的双中心验证的洞察力,用于初级前列腺癌的特征化,使用组织病理学作为参考
Samuele Ghezzo1,2, Praveen Gurunath Bharathi3, Heying Duan3
1Faculty of Medicine and Surgery, Vita-Salute San Raffaele University, 20132 Milan, Italy.
Cancers
|December 17, 2024
概括
使用PSMA PET放射学进行前列腺癌 (PCa) 鉴定是有希望的,但需要外部验证. 结合来自多个中心的数据改善了模型性能,突出了解决PCa中可靠放射学中心特定偏差的需要.
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:
- PSMA PET放射学显示出初级前列腺癌 (PCa) 鉴定的潜力.
- 之前的研究受限于样本规模较小和缺乏外部验证.
- 这项研究旨在验证现有的放射学签名,并使用更大的双中心数据集开发新的放射学签名.
研究的目的:
- 在一个独立的队列中验证之前开发的PSMA PET放射学签名.
- 评估不同中心的放射学特征的概括性.
- 开发和验证一个新的放射学签名,使用组合的双中心数据来改进PCa的表征.
主要方法:
- 对来自两个独立医院 (中心1和中心2) 的127名前列腺癌患者的回顾性分析.
- 测试一个先前存在的放射学模型,并使用蒙特卡洛交叉验证开发新的机器学习模型.
- 训练和测试模型的独立,跨中心,和组合的双中心数据.
主要成果:
- 原来的放射性特征在中心1的表现很好 (AUC为80.4%),但在中心2的表现很差 (AUC为62.7%).
- 在现有特征上训练的新模型显示了类似的中心特定性能变化.
- 在双中心数据集上开发的新型放射学签名实现了高平均AUC91.4%.
结论:
- 放射学模型的性能受到中心特定因素和数据集特征的重大影响.
- 来自多个中心的放射学数据集的结合可以减轻偏见并提高概括性.
- 外部验证仍然至关重要,以确认放射学签名在前列腺癌中临床应用的稳定性.
相关概念视频
Positron Emission Tomography
Positron emission tomography (PET) is a medical imaging technique involving radiopharmaceuticals — substances that emit short-lived radiation. Although the first PET scanner was introduced in 1961, it took 15 more years before radiopharmaceuticals were combined with the technique and revolutionized its potential.
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 being...
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 being...
Radiological Investigation III: Pulmonary Angiogram and PET Scan
Radiological investigations are paramount in the diagnosis and management of various pulmonary diseases. Two essential investigations are the Pulmonary Angiogram and the Positron Emission Tomography (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...
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...
Imaging Studies II: Positron Emission Tomography and Scintigraphy
Positron Emission Tomography (PET) is a medical imaging technique that provides crucial insights into the body's physiological functions at a molecular level. It is an indispensable resource for diagnosing, staging, and monitoring various illnesses, notably cancer, neurological disorders, and cardiovascular conditions.
Fundamental Principles of PET
Fundamental Principles of PET


