Study on RS-EPI-DWI’s Value in Axillary Lymph Node Examination of Breast Cancer
DENG Heping1，WANG Min2，LI Zhenlin1
1. Department of Radiology, West China Hospital of Sichuan University, Chengdu Sichuan 610000, China| 2. Department of Radiology, Sichuan Cancer Hospital, Chengdu Sichuan 610000, China
Abstract：Objective To investigate the advantage of readout segmented echo planar imaging diffusion weighted imaging (RS-EPI-DWI) in axillary lymph node examination of breast cancer. Methods The diffusion weighted imaging (DWI) images of 43 patients with breast cancer and axillary lymph node metastasis confirmed by pathology were analyzed. All patients were scanned by Siemens 3.0T Skyra MRI scanner with single shot echo planar imaging diffusion weighted imaging (SS-EPI-DWI) sequence and RS-EPI_DWI sequence. The signal to noise ratio (SNR) and contrast to noise ratio (CNR) were calculated by measuring the signal to noise ratio (SNR) and the noise value of the axial region on DWI images with b value of 800 s/mm2. The ADC values of lymph nodes were measured on the apparent diffusion coefficient (ADC) map, and the differences of ADC values between the two groups were compared. The subjective classification of axillary lymph nodes in the two groups of images was made. Results The SNR (t=11.880, P<0.001) and CNR (t=10.558, P<0.001) in RS-EPI_DWI were significantly higher than those in SS-EPI_DWI, but there was no significant difference in ADC value of metastatic lymph nodes between SS-EPI_DWI and RS-EPI_DWI (t=-0.477, P=0.636>0.05). In addition, the image grading of RS-EPI_DWI was significantly better than that of SS-EPI_DWI (t=-6.457, P<0.01), and the images of RS-EPI_DWI group had more advantages than SS-EPI_DWI in displaying axillary lymph nodes. Conclusion The image quality of RS-EPI_DWI is better than that of SS-EPI_DWI, and has more clinical value for axillary lymph node display. There is no significant difference in ADC value between RS-EPI_DWI and SS-EPI_DWI. at the same time, ADC value of RS-EPI_DWI is better than that of SS-EPI_DWI for small lesions.
邓和平1，王闽2，李真林1. 探讨RS-EPI-DWI成像在乳腺癌腋窝淋巴结检查中的价值[J]. 中国医疗设备, 2020, 35(11): 118-121.
DENG Heping1，WANG Min2，LI Zhenlin1. Study on RS-EPI-DWI’s Value in Axillary Lymph Node Examination of Breast Cancer. China Medical Devices, 2020, 35(11): 118-121.
