[Comparison of CT-like Images Using MRI].

Nihon Hoshasen Gijutsu Gakkai zasshi Pub Date : 2025-01-01 DOI:10.6009/jjrt.25-1467

Ryosuke Fujii, Masayoshi Sugimura, Masakazu Kurita

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Abstract

Purpose: The objective of this study was to quantitatively evaluate and compare the image contrast and image quality of several recently developed CT-like images (oZTEo, LAVA, MERGE).

Methods: Using a self-made phantom created with a GE Healthcare (Milwaukee, WI, USA) MRI Pioneer 3.0T and pig leg bone, along with four types of tissue-mimicking phantoms, we compared cortical bone, contrast-to-noise ratio (CNR), signal change ratio of the tissue-simulating phantom, and visual evaluation.

Results: CR and CNR were lowest in the order of MERGE, LAVA, and oZTEo. The signal change ratio of background signal and visual evaluation were highest in the order of oZTEo, LAVA, and MERGE.

Conclusion: In comparing CT-like images using MRI, the bone cortex could be visualized in white using black-and-white inversion in all CT-like images, and fracture lines could also be visualized. By capturing CT-like images tailored to the characteristics of each imaging sequence, it is expected that the number of examinations that can be completed using MRI alone will increase, further enhancing the usefulness of MRI.

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[ct样图像与MRI的比较]。

目的：本研究的目的是定量评价和比较最近开发的几种ct样图像（oZTEo， LAVA， MERGE）的图像对比度和图像质量。方法：采用GE Healthcare （Milwaukee， WI， USA）的MRI Pioneer 3.0T和猪腿骨自制假体，并与4种组织模拟假体进行对比，比较皮质骨、组织模拟假体的噪比（CNR）、信号变化率以及视觉评价。结果：CR、CNR依次为MERGE、LAVA、oZTEo。背景信号和视觉评价的信号变化率依次为oZTEo、LAVA、MERGE。结论：在MRI对比ct样图像时，所有ct样图像均可通过黑白反转显示骨皮质白色，并可显示骨折线。通过捕获适合每个成像序列特征的ct样图像，预计仅使用MRI即可完成的检查数量将增加，从而进一步增强MRI的有用性。

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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Nihon Hoshasen Gijutsu Gakkai zasshi

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