Smart Engines Service LLC, Moscow, Russia.
Institute for Information Transmission Problems RAS, Moscow, Russia.
PLoS One. 2024 Jul 22;19(7):e0307231. doi: 10.1371/journal.pone.0307231. eCollection 2024.
Monitored tomographic reconstruction (MTR) is a potentially powerful tool for dose and time reduction in computed tomography scanning. We are the first to study the issue of practical implementation of MTR protocols in current-generation real-life instruments. We propose an empirical quantitative model for calculating acquisition and reconstruction times. It is demonstrated that projection acquisition order has a significant impact on the time and dose of tomographic experiments. The new alternative acquisition most suitable for MTR protocols is proposed. To estimate the restrictions and scope of applicability for MTR four typical commercial setups are studied within a proposed model. We construct an experimental stand for achieving a real-time reconstruction, together with validation of the proposed acquisition time model. We demonstrate that real-time reconstruction may be implemented without slowing down an acquisition process. An optimization of reconstruction from partial data is proposed, which allowed the production of 385 and 440 reconstructions for standard and proposed acquisition orders correspondingly during a single acquisition of 512 projections. The results of the study demonstrate that with proposed optimizations MTR can be effectively utilized for practical applications using the current generation of existing setups in industrial and nano tomography fields.
监测断层重建（MTR）是在计算机断层扫描中降低剂量和时间的一种潜在有力工具。我们首次研究了在当前实际仪器中实际实施 MTR 方案的问题。我们提出了一种用于计算采集和重建时间的经验定量模型。结果表明，投影采集顺序对断层实验的时间和剂量有重大影响。提出了最适合 MTR 方案的新替代采集方法。为了估计 MTR 的限制和适用范围，在提出的模型中研究了四种典型的商业设置。我们构建了一个实现实时重建的实验台，并验证了所提出的采集时间模型。我们证明，实时重建可以在不降低采集过程速度的情况下实现。提出了一种基于部分数据的重建优化方法，该方法允许在 512 个投影的单次采集过程中分别对标准和建议的采集顺序进行 385 和 440 次重建。研究结果表明，通过提出的优化方案，MTR 可以有效地用于工业和纳米断层扫描领域当前一代现有设备的实际应用。
