滤波背投重建中的预重建过程对低管电压计算机断层扫描图像质量的影响。

IF 1.7 Q3 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING

Radiological Physics and Technology Pub Date : 2024-03-01 Epub Date: 2023-12-15 DOI:10.1007/s12194-023-00764-9

Masaki Takemitsu, Shohei Kudomi, Kazuki Takegami, Takuya Uehara

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引用次数: 0

摘要

本研究旨在评估低管电压计算机断层扫描（CT）重建前处理对滤波背投影（FBP）重建图像质量的影响。在不同剂量水平的第三代双源 CT（70 kVp 和 120 kVp）上扫描了小型和大型质量保证水模型（直径分别为 19 厘米和 33 厘米）。图像质量根据噪声功率谱（NPS）和基于任务的传递函数（TTF）进行评估。在小型模型中，70 和 120 kVp 方案的 NPS 和 TTF 具有可比性。在大型模型中，与 120 kVp 方案相比，即使在高剂量水平，70 kVp 方案的 NPS 曲线也会发生变化，TTF 也会下降。我们的研究结果表明，在低管电压 CT 中对大型物体进行 FBP 重建时也要执行预重建过程，这对图像质量有影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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The effect of a pre-reconstruction process in a filtered back projection reconstruction on an image quality of a low tube voltage computed tomography.

This study aims to evaluate the effect of pre-reconstruction process for low tube voltage computed tomography (CT) on image quality of filtered back projection (FBP) reconstruction. Small and large quality assurance water phantoms (19 and 33 cm diameter) were scanned on a third-generation dual-source CT with 70 kVp and 120 kVp at various dose levels. Image quality was assessed in terms of the noise power spectrum (NPS) and task-based transfer function (TTF). NPSs and TTFs in the small phantom were comparable between 70 and 120 kVp protocols. In the large phantom, the curves of the NPS changed and the TTF decreased even at the high-dose levels for 70 kVp protocol compared to 120 kVp protocol. Our results indicated that the pre-reconstruction process is performed in low tube voltage CT for large objects even for the FBP reconstruction and has an effect on the image quality.

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来源期刊

Radiological Physics and Technology RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING-

CiteScore

3.00

自引率

12.50%

发文量

期刊介绍： The purpose of the journal Radiological Physics and Technology is to provide a forum for sharing new knowledge related to research and development in radiological science and technology, including medical physics and radiological technology in diagnostic radiology, nuclear medicine, and radiation therapy among many other radiological disciplines, as well as to contribute to progress and improvement in medical practice and patient health care.