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  • Title: Diffusion-weighted imaging with simultaneous multi-slice echo-planar technique for the diagnosis of breast magnetic resonance imaging.
    Author: Machida Y, Nomura K, Shimauchi A, Kato Y, Nagatsuka M, Fukuma E.
    Journal: Jpn J Radiol; 2020 Apr; 38(4):358-364. PubMed ID: 31938960.
    Abstract:
    PURPOSE: To evaluate the diagnostic potential of simultaneous multi-slice echo-planar diffusion-weighted imaging (DWI) (SMS-DWI). MATERIALS AND METHODS: A total of 55 consecutive patients underwent breast magnetic resonance imaging (MRI) between April and September 2018. SMS-DWI and single-shot echo-planar DWI (SS-EPI-DWI) sequences were obtained with the following parameters: b value, 0, 850, and 1200 mm2/s for both; spacing between sections, 2 mm for SMS-DWI and 3 mm for SS-EPI-DWI. Lesion visibility was assessed by two radiologists, and minimal and maximal apparent diffusion coefficients (ADCs) for masses were measured. The Mann-Whitney U test and receiver operating characteristic (ROC) curve analysis were performed. RESULTS: Of the 55 cases, 23 (41.8%) were malignant and 32 (58.2%) were benign. Visual conspicuity was superior on SMS-DWI in 47.1% (n = 16/34) or 55.9% (n = 19/34) among the lesions visible on DWI and ADC. ROC curve analyses revealed an area under the curve of 0.87 [95% confidence interval (CI) 0.68-1.00], 0.94 (95% CI 0.86-1.00), 0.93 (95% CI 0.84-1.00) and 0.90 (95% CI 0.77-1.00) for minimal and maximal ADC on SMS-DWI and ADC on SS-EPI-DWI, respectively. CONCLUSION: Simultaneous multi-slice technique provided breast DWI of better visual conspicuity and comparable diagnostic performance with shorter acquisition time.
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