双低b值驱动的U形融合GAN用于合成高b值前列腺DWI
Rui Feng1, Qun Huang2, Aiping Chen3
1Jiangsu Province Engineering Research Center of Smart Wearable and Rehabilitation Devices, School of Biomedical Engineering and Informatics, Nanjing Medical University, Nanjing, 211166, China.
Physical and engineering sciences in medicine
|February 24, 2026
概括
一种新的深度学习方法从低b值的数据中合成高b值的前列腺扩散加权成像 (DWI). 这种UsFGAN方法提高了前列腺癌检测的图像质量和诊断准确性,减少了扫描时间.
科学领域:
- 医疗成像医学成像
- 人工智能的人工智能
- 放射学 放射学是一门学科.
背景情况:
- 高b值扩散加权成像 (DWI) 对于前列腺癌检测至关重要,因为它提供了卓越的对比度.
- 直接获取高b值的DWI受到长时间的扫描时间,技术要求和图像工件的限制.
研究的目的:
- 开发一种新的深度学习方法,从低b值数据中合成高b值的前列腺DWI.
- 提高高质量的前列腺DWI临床使用的效率和可访问性.
主要方法:
- 提出了一个双重低b值驱动的U形融合生成对抗网络 (UsFGAN).
- 该网络集成了U-Net子网络,Swin-Transformer与残余块 (STRB) 以及具有多个特征融合块 (MFFB) 的层次融合网络.
- 对280名受试者的多中心数据集进行了验证.
主要成果:
- 与最先进的模型 (CycleGAN,Pix2Pix,DiscoGAN) 相比,UsFGAN方法表现出更高的性能,其信号对噪声和结构相似性指标较高.
- 合成的高b值DWI在前列腺病变检测中实现了86.3%的准确性.
- 放射科医生的定性评估证实合成图像在噪声抑制,文物减少和诊断可接受性方面与真正的高b值扫描相似.
结论:
- 通过利用补充的低b值信息,UsFGAN有效地合成了高质量的高b值前列腺DWI.
- 该方法显示了显著的潜力,可以减少扫描时间,并提高前列腺MRI的诊断价值,以评估疾病.
相关概念视频
01:13¹H NMR: Complex Splitting
A proton M that is coupled to a proton X results in doublet signals for M. However, NMR-active nuclei can be simultaneously coupled to more than one nonequivalent nucleus. When M is coupled to a second proton A, such as in styrene oxide, each peak in the doublet is split into another doublet.
Splitting diagrams or splitting tree diagrams are routinely used to depict such complex couplings. While drawing splitting diagrams, the splitting with the larger coupling constant is usually applied first.
Splitting diagrams or splitting tree diagrams are routinely used to depict such complex couplings. While drawing splitting diagrams, the splitting with the larger coupling constant is usually applied first.
01:13¹H NMR Signal Multiplicity: Splitting Patterns
When protons A and X are coupled, their nuclear spin energy levels are slightly modified. This is because the energy required to excite proton A to a spin state parallel to proton X is slightly different from the energy required for it to become anti-parallel to spin X. Consequently, there are two possible excitation frequencies for A (A1 and A2), depending on the spin state of X, and vice versa. The mutual nature of coupling implies that the difference between frequencies A1 and A2, indicated...
01:10Interpreting ¹H NMR Signal Splitting: The (n + 1) Rule
In the AX proton spin system, proton A can sense the two spin states of a coupled proton X, resulting in a doublet NMR signal with two peaks of equal (1:1) intensity. When proton A is coupled to two equivalent protons (AX2 spin system), the spin states of each X can be aligned with or against the external field, creating three possible scenarios. This results in a 1:2:1 triplet signal, where the central peak corresponds to the chemical shift of A and is twice as large or intense as the others.
01:20Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)
Two NMR-active nuclei bonded to a central atom can be involved in geminal or two-bond coupling. Geminal coupling is commonly seen between diastereotopic protons in chiral molecules and unsymmetrical alkenes, among others.
The central atom need not be NMR-active because its electrons are affected by the electron polarization of the spin-active atoms. However, spin information is transmitted less effectively than in one-bond coupling, and 2J values are usually weaker than 1J values. The energy of...
The central atom need not be NMR-active because its electrons are affected by the electron polarization of the spin-active atoms. However, spin information is transmitted less effectively than in one-bond coupling, and 2J values are usually weaker than 1J values. The energy of...
01:04¹³C NMR: ¹H–¹³C Decoupling
The probability of having two carbon-13 atoms next to each other is negligible because of the low natural abundance of carbon-13. Consequently, peak splitting due to carbon-carbon spin-spin coupling is not observed in spectra. However, protons up to three sigma bonds away split the carbon signal according to the n+1 rule, resulting in complicated spectra.
A broadband decoupling technique is used to simplify these complex, sometimes overlapping, signals. Broadband decoupling relies on a...
A broadband decoupling technique is used to simplify these complex, sometimes overlapping, signals. Broadband decoupling relies on a...
01:19Urodynamic Studies: Uroflowmetry
Uroflowmetry is a non-invasive urodynamic test designed to measure various aspects of urination, including volume, flow rate, and the time to void. This test is crucial for diagnosing and assessing conditions such as bladder outlet obstruction, bladder dysfunction, incomplete bladder emptying, incontinence, and urinary tract blockages caused by benign prostatic hyperplasia (BPH) and urethral strictures.Pre-Test Instructions:Before a uroflowmetry test, patients are typically advised to drink...