Feasibility of an <italic style="font-style: italic">in vitro</italic> phantom in high-resolution magnetic resonance imaging of endovaginal coil

Zhang Ke; Tang Mingmei; Yu Bin; Liu Hui; Pan Yuanrui; Lü Fajin

doi:10.13406/j.cnki.cyxb.003716

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Feasibility of an in vitro phantom in high-resolution magnetic resonance imaging of endovaginal coil

Technology and methodology | 更新时间：2025-10-21

- Feasibility of an in vitro phantom in high-resolution magnetic resonance imaging of endovaginal coil
- Journal of Chongqing Medical University Vol. 50, Issue 9, Pages: 1290-1296(2025)
- 作者机构：
  
  1.重庆医科大学生物医学工程学院、超声医学工程国家重点实验室，重庆 400016
  2.重庆医科大学附属第一医院放射科，重庆 400016
- 作者简介：
- 基金信息：
- DOI：10.13406/j.cnki.cyxb.003716
  CLC： R445.2
- Received：21 November 2023，
  
  Revised：2024-04-29，
  
  Accepted：13 May 2024，
  
  Published：28 September 2025
- 稿件说明：
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张珂,唐明梅,郁斌,等.应用体外模型对阴道腔内线圈高清成像的磁共振可行性研究[J].重庆医科大学学报,2025,50(9):1290-1296.

Zhang Ke,Tang Mingmei,Yu Bin,et al.Feasibility of an ,in vitro phantom in high-resolution magnetic resonance imaging of endovaginal coil[J].Journal of Chongqing Medical University,2025,50(9):1290-1296.
张珂,唐明梅,郁斌,等.应用体外模型对阴道腔内线圈高清成像的磁共振可行性研究[J].重庆医科大学学报,2025,50(9):1290-1296. DOI： 10.13406/j.cnki.cyxb.003716.

Zhang Ke,Tang Mingmei,Yu Bin,et al.Feasibility of an ,in vitro phantom in high-resolution magnetic resonance imaging of endovaginal coil[J].Journal of Chongqing Medical University,2025,50(9):1290-1296. DOI： 10.13406/j.cnki.cyxb.003716.

摘要

目的

为未来阴道腔内线圈磁共振（magnetic resonance Imaging，MRI）体内成像提供参数指导，探索阴道腔内线圈技术的成像潜质。

方法

应用阴道腔内线圈对包含3种空间分辨率模块的体外模型进行T2 快速自旋回波（turbo spin echo，TSE）序列成像，改变主要成像参数。对不同成像参数下的图像测量信号计算信号噪声比（signal to noise ratio，SNR）、对比噪声比（contrast to noise ratio，CNR）和对比度（contrast，C），再分别划定区间进行成像质量评分，以及对体模的3种分辨率模块的显示情况进行结构显示评分，利用非参数检验比较组间的统计学差异。

结果

当主要成像参数为层厚2 mm、层间距0.2 mm、激励次数4、矩阵384×384、FOV 52 mm×52 mm、TE 74 ms、带宽180 Hz/Pixel、加速因子18，此时采集空间分辨率为0.14 mm×0.14 mm×2.00 mm，重建分辨率为0.07 mm×0.07 mm×2.00 mm，该参数下图像质量良好，三规格分辨率均可清晰显示，并且扫描时间临床可接受。层厚、层间距、激励次数、FOV和加速因子的成像质量评分每小组的组间差异均有统计学意义（

0.05）；矩阵、TE和带宽的成像质量评分每小组的

值分别为0.521、0.502和0.566，组间差异均无统计学意义（

0.05）。所有参数的结构显示评分每小组的组间差异均有统计学意义（

0.05）。

结论

本实验所得参数可为未来阴道腔内线圈在人体中的应用提供指导，表现了该设备具有极高的成像潜质，阴道腔内线圈在未来临床应用中有分辨微小病灶的潜力。

Abstract

Objective

To provide guidance on parameters for future endovaginal coil magnetic resonance imaging （MRI）

in vivo

，and to investigate the imaging potential of the endovaginal coil technique.

Methods

The endovaginal coil was used to perform T2-weighted turbo spin echo sequence imaging on a phantom containing three spatial resolution modules，with variations in key imaging parameters. Signal-to-noise ratio（SNR），contrast-to-noise ratio（CNR），and contrast （C） were calculated for images under different imaging parameters，and image quality was assessed based on scores within specified intervals. Structural display scores were determined for the three resolution modules of the phantom，and the non-parametric tests were used for statistical comparison between groups.

Results

Under the main imaging parameters of a slice thickness of 2 mm，a slice gap of 0.2 mm，4 times of excitation repetition，a matrix size of 384×384，an FOV of 52 mm×52 mm，a TE of 74 ms，a bandwidth of 180 Hz/Pixel，and an acceleration factor of 18，good image q

uality was obtained with an acquired spatial resolution of 0.14 mm×0.14 mm×2.00 mm and a reconstructed resolution of 0.07 mm×0.07 mm×2.00 mm，and all three resolution modules were clearly visualized with a clinically acceptable imaging time. There were significant differences between groups in the imaging quality scores of slice thickness，slice gap，number of excitations，FOV，and acceleration factor（

0.05），while there were no significant differences in matrix，TE，and bandwidth between groups（

=0.521，0.502，and 0.566）. There were significant differences in the structural display scores for all parameters between groups（

0.05）.

Conclusion

The parameters obtained in this experiment can guide the future application of endovaginal coils in the human body，demonstrating the extremely high imaging potential of this technique，and endovaginal coil has the potential of identifying small lesions in future clinical practice.

关键词

Keywords

references

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Feasibility of an in vitro phantom in high-resolution magnetic resonance imaging of endovaginal coil

DOI：10.13406/j.cnki.cyxb.003716

摘要

Abstract

关键词

Keywords

references