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• CLINICAL ARTICLE •
The feasibility of reduced field-of-view DWI in the evaluation of bone marrow edema in knee joint contusion
ZHOU Shuang  ZHA Yunfei  XING Dong  LIU Fang  LIU Changsheng 

Cite this article as: Zhou S, Zha YF, Xing D, et al. The feasibility of reduced field-of-view DWI in the evaluation of bone marrow edema in knee joint contusion[J]. Chin J Magn Reson Imaging, 2021, 12(2): 52-56. DOI:10.12015/issn.1674-8034.2021.02.012.


[Abstract] Objective To investigate the feasibility of reduced field-of-view diffusion-weighted imaging (rFOV DWI) in evaluating bone marrow edema lesions (BMLs) after knee trauma. Materials andMethods Sixty patients with knee trauma were examined by sagittal proton density-weighted imaging fat-saturated (PDWI-FS) sequence, full-field diffusion-weighted imaging (fFOV DWI), and rFOV DWI. The image quality of rFOV DWI and fFOV DWI of the knee and the ADC values of BMLs were compared using the paired student t-test. The number of BMLs in the knee joints among the three sequences was compared with the Chi-square test.Results 109, 180 and 179 BMLs were detected on PDWI, rFOV and fFOV DWI ADC maps, respectively. BMLs detected on PDWI could almost be consistently detected on ADC maps of the two DWI techniques, and 70 lesions were additionally detected. The image quality of rFOV DWI was more excellent than that of fFOV DWI in knee bone contusion (P＜0.05). The mean ADC value of BMLs measured on rFOV DWI was lower than that measured on fFOV DWI, and the difference was statistically significant (P＜0.01).Conclusions The ability of both rFOV and fFOV DWI ADC maps in detecting traumatic BMLs of the knee is higher than the corresponding PDWI-FS. Moreover, the image quality of rFOV DWI is higher than that of fFOV DWI, which helps improve diagnostic confidence in BMLs.
[Keywords] magnetic resonance imaging；reduced field of view；full field of view；diffusion-weighted imaging；knee joint；bone contusion；bone marrow edema

ZHOU Shuang   ZHA Yunfei*   XING Dong   LIU Fang   LIU Changsheng  

Department of Radiology, Renmin Hospital of Wuhan University, Wuhan 430060, China

Zha YF, E-mail: zhayunfei999@126.com

Conflicts of interest   None.

ACKNOWLEDGMENTS This work was part of National Natural Science Foundation of China (No.81871332, 81801670).
Received  2020-09-08
Accepted  2021-01-12
DOI: 10.12015/issn.1674-8034.2021.02.012
Cite this article as: Zhou S, Zha YF, Xing D, et al. The feasibility of reduced field-of-view DWI in the evaluation of bone marrow edema in knee joint contusion[J]. Chin J Magn Reson Imaging, 2021, 12(2): 52-56. DOI:10.12015/issn.1674-8034.2021.02.012.

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