髋关节植入物患者的前列腺磁共振成像(MRI)--使用模型制定方案。

IF 2.9 2区 医学 Q2 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING Quantitative Imaging in Medicine and Surgery Pub Date : 2024-10-01 Epub Date: 2024-09-26 DOI:10.21037/qims-24-604
Yuriy A Vasilev, Olga Yu Panina, Dmitry S Semenov, Ekaterina S Akhmad, Kristina A Sergunova, Stanislav A Kivasev, Alexey V Petraikin
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引用次数: 0

摘要

背景:金属结构是伪影的来源之一,会使磁共振成像(MRI)的解释变得非常复杂。在怀疑患有前列腺癌的男性中使用前列腺磁共振成像作为初步检查,导致该检查的使用率增加。这项研究的目的是解决一个具有临床意义的问题:确保在前列腺磁共振成像中减少金属髋关节植入物造成的伪影。另一个目标是评估减少伪影的方法对定量测量的影响:前列腺(PG)假体模型是一个圆柱体,内装浓度分别为 40%、30% 和 20% 的聚乙烯吡咯烷酮水溶液[中心区(CZ)、外周区(PZ)和 "病变区"]。在飞利浦 Ingenia 1.5T 和飞利浦 Ingenia 3T 扫描仪上进行了模拟磁共振成像研究:在 1.5 T,与标准方法相比,人工减少伪影(MAR)和 ZOOM(软件减少伪影的名称)技术可减少感兴趣区(ROI)内伪影的影响,表现为平均表观弥散系数(ADC)(CZ、PZ、"病变")的降低。在 3T 技术中,未检测到这种影响。标准和 MAR 技术的 ADC 结果相同,而 ZOOM 的 ADC 值有所增加。尽管 3.0T 扫描仪的 ADC 值差异很小,但 ADC 值与参考值的偏差很大(高达 30.4%)。因此,有必要在 3.0 T 设备的 ADC 计算中使用校正系数。在本临床病例中,尽管扫描区域有两个髋关节置换装置,但仍获得了高质量的断层图像,没有任何伪影:在植入物存在的情况下进行准确的前列腺磁共振成像对于准确诊断至关重要。这种方法可以减少髋关节植入物造成的伪影,以最佳方式显示前列腺和前列腺周围组织,并检测恶性和良性病变。
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Prostate magnetic resonance imaging (MRI) in patients with hip implants-presetting a protocol using a phantom.

Background: Metal structures are a source of artifacts that significantly complicate the interpretation of magnetic resonance imaging (MRI). The use of prostate MRI as a preliminary test in men with a suspicion on prostate cancer leads to an increased use of the test. The aim of this study was to solve a clinically significant problem: to ensure the reduction of artifacts from metal hip implants during prostate MRI. Another goal was to evaluate the impact of artifact reduction methods on quantitative measurements.

Methods: The prostate gland (PG) phantom model was a cylinder filled with an aqueous solution of polyvinylpyrrolidone at the concentrations of 40%, 30%, and 20% [central zone (CZ), peripheral zone (PZ), and "lesion", respectively]. Phantom MRI study was conducted on Philips Ingenia 1.5T and Philips Ingenia 3T scanners.

Results: For 1.5 T, the reduction in the influence of artifacts inside region of interest (ROI) was observed, expressed in a decrease in the average apparent diffusion coefficient (ADC) (CZ, PZ, "lesion") for the manual artifact reduction (MAR) and ZOOM (title of software artifact reduction) techniques compared to the standard method. For 3T this effect was not detected. The same ADC results were obtained for Standard and MAR techniques, and increased ADC values for ZOOM. Despite the fact that the spread of ADC values on 3.0T scanners was minimal, there was a significant deviation of ADC values from the reference ones (up to 30.4%). Therefore, it is necessary to use a correction coefficient in the ADC calculation for the 3.0 T device. In the presented clinical case, high-quality tomograms were obtained without any artifacts, despite the presence of two hip replacement devices in the scanning area.

Conclusions: The accurate prostate MRI in the presence of implants is essential for an accurate diagnosis. This approach allows to reduce artifacts from hip implants, to visualize PG and periprostatic tissue in the best way, and to detect malignant and benign changes.

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来源期刊
Quantitative Imaging in Medicine and Surgery
Quantitative Imaging in Medicine and Surgery Medicine-Radiology, Nuclear Medicine and Imaging
CiteScore
4.20
自引率
17.90%
发文量
252
期刊介绍: Information not localized
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