R2* mapping and reduced field‐of‐view diffusion‐weighted imaging for preoperative assessment of nonenlarged lymph node metastasis in rectal cancer

Author:

Wang Jing1,Hu Shan2,Liang Ping3,Hu Xuemei3,Shen Yaqi3ORCID,Peng Yang3ORCID,Kamel Ihab4,Li Zhen3

Affiliation:

1. Department of Pediatrics, Tongji Hospital, Tongji Medical College Huazhong University of Science and Technology Wuhan China

2. Department of Radiology, Guangdong Provincial People's Hospital Guangdong Academy of Medical Sciences Guangzhou Guangdong China

3. Department of Radiology, Tongji Hospital, Tongji Medical College Huazhong University of Science and Technology Wuhan Hubei China

4. Russell H. Morgan Department of Radiology and Radiological Science the Johns Hopkins Medical Institutions Baltimore Maryland USA

Abstract

AbstractThe aim of the current study is to investigate the diagnostic value of R2* mapping versus reduced field‐of‐view diffusion‐weighted imaging (rDWI) of the primary lesion of rectal cancer for preoperative prediction of nonenlarged lymph node metastasis (NLNM). Eighty‐one patients with pathologically confirmed rectal cancer underwent preoperative R2* mapping and rDWI sequences before total mesorectal excisions and accompanying regional lymph node dissections. Two radiologists independently performed whole‐tumor measurements of R2* and apparent diffusion coefficient (ADC) parameters on primary lesions of rectal cancer. Patients were divided into positive (NLNM+) and negative (NLNM‐) groups based on their pathological analysis. The tumor location, maximum diameter of the tumor, and maximum short diameter of the lymph node were assessed. R2* and ADC, pT stage, tumor grade, status of mesorectal fascia, and extramural vascular invasion were also studied for their potential relationships with NLNM using multivariate logistic regression analysis. The NLNM+ group had significantly higher R2* (43.56 ± 8.43 vs. 33.87 ± 9.57, p < 0.001) and lower ADC (1.00 ± 0.13 vs. 1.06 ± 0.22, p = 0.036) than the NLNM‐ group. R2* and ADC were correlated to lymph node metastasis (r = 0.510, p < 0.001 for R2*; r = −0.235, p = 0.035 for ADC). R2* and ADC showed good and moderate diagnostic abilities in the assessment of NLNM status with corresponding area‐under‐the‐curve values of 0.795 and 0.636. R2* provided a significantly better diagnostic performance compared with ADC for the prediction of NLNM status (z = 1.962, p = 0.0498). The multivariate logistic regression analysis demonstrated that R2* was a compelling factor of lymph node metastasis (odds ratio = 56.485, 95% confidence interval: 5.759–554.013; p = 0.001). R2* mapping had significantly higher diagnostic performance than rDWI from the primary tumor of rectal cancer in the prediction of NLNM status.

Funder

National Natural Science Foundation of China

Publisher

Wiley

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3