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在99m Tc-前列腺特异性膜抗原前列腺成像中,稀疏视图重建和降噪

Sayna Jamaati¹, Masoumeh Dorri Giv², Xiaotong Hong³

¹Department of Energy Engineering, Sharif University of Technology, Tehran.

Nuclear medicine communications

|November 17, 2025

概括

稀疏视图99mTc-PSMA SPECT成像与30个视图是可行的前列腺癌. 非局部手段过比高斯过提高了图像质量,提高了这项初步研究的诊断准确性.

科学领域:

核医学就是核医学.
医疗成像医学成像
放射化学放射化学是指辐射化学.

背景情况:

前列腺特异性膜抗原 (PSMA) 向成像对于前列腺癌管理至关重要.
单光子发射计算机断层扫描 (SPECT) 是PSMA成像的一个关键模式.
稀疏视图采集技术旨在减少扫描时间和辐射剂量.

研究的目的:

评估99mTc-PSMA SPECT在前列腺成像中的可行性和临床价值.
为了比较传统高斯过与边缘保护非本地介质 (NLM) 过在稀疏视图SPECT重建中的性能.
评估缩小视图采样对图像质量和诊断精度的影响.

主要方法:

经过活检证明的前列腺癌的10名患者接受了全角99mTc-PSMA SPECT采集.
数据被追溯地减少到30,15和10个视图.
图像使用有序子集期望最大化重建,并使用高斯式或NLM过器进行后过.
进行了定量指标 (MAPE,NRMSE,PSNR,NB) 和核医学医生盲目视觉评估.

主要成果:

将视图减半至 30 保存了诊断准确度,误差最小 (MAPE_ROI1 ≤ 7%).
15次视图的重建显示了由于低采样导致的文物; 10次视图产生了不可接受的图像质量.
在30视图重建中,NLM过显著优于高斯过,改善了NRMSE,PSNR和NB.
专家读者显示,对30视图重建的观察者间一致性很高.

结论:

使用30个视图的稀疏视图99mTc-PSMA SPECT可用于例行和紧急前列腺成像.
从15个视图进行重建,不建议在没有反别名策略的情况下进行,因为有别名文物.
对于稀疏视野的PSMA-SPECT,NLM重建后的过提供了附加值,因此需要在更大的研究中进行进一步的调查.

关键词:

前列腺癌是前列腺癌.前列腺特异性膜抗原.单光子发射计算机断层扫描稀疏视图重建的重建

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