Keywords:
Bones, Oncology, Head and neck, MR-Functional imaging, CT-Quantitative, MR-Cholangiography, Embolisation, Contrast agent-other, Biopsy, Image guided radiotherapy, Infection, Embolism / Thrombosis
Authors:
P. Li1, H. Zhang1, X. Yan2, J. Qu1; 1Henan/CN, 2Shanghai/CN
DOI:
10.26044/ecr2019/C-0427
Methods and materials
Forty-four patients with pathologically proven EC were imaged on a 3T MR scanner before surgery,
including routine sequences and T2 mapping.
T2 values of tumor were measured by 2 independent radiologists with more than 5 years experiences in chest radiology.
The maximum,
minimum and mean values of T2 values were measured and recored on picture archiving and communication system (PACS). Three areas of interest were drawn for each lesion,
and the mean value was taken. The area of interest varies by no more than 3 square millimeters. The patients were divided into three differentiated groups,
including high,
moderate and low,
according to the pathological differentiated degree of EC. The inter-reader agreement for T2 values was assessed with Cohen’s weighted kappa (k>0.81,excellent agreement; k=0.61–0.80,
good agreement; k=0.41–0.60,moderate agreement; k=0.21–0.40,
fair agreement; k<0.20,poor agreement).The correlation between T2 values and pathological differentiation degree was analyzed by Spearman correlation test.
Independent-samples T test was also used to verify the difference in differentiation degree of EC.