Test-retest reliability analysis of MRI criteria in the 2019 Bosniak classification of cystic renal masses
10.3760/cma.j.cn112149-20211013-00918
- VernacularTitle:肾脏囊性病变2019版Bosniak分类中MRI标准的观察者重测信度分析
- Author:
Xu BAI
1
;
Songmei SUN
;
Huanhuan KANG
;
Lin LI
;
Wei XU
;
Chungang ZHAO
;
Yongnan PIAO
;
Ying WANG
;
Xiaona WANG
;
Meiyan YU
;
Meifeng WANG
;
Kaiqiang JIA
;
Aitao GUO
;
Huiyi YE
;
Haiyi WANG
Author Information
1. 解放军总医院第五医学中心放射科，北京 100039
- Keywords:
Magnetic resonance imaging;
Cystic renal mass;
Bosniak classification;
Test-retest reliability
- From:
Chinese Journal of Radiology
2022;56(10):1121-1128
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To evaluate the test-retest reliability of MRI criteria in the 2019 Bosniak classification of cystic renal masses (CRMs) and to analyze the impact of lesions′ property, size and readers′ experience on the test-retest reliability.Methods:From January 2009 to June 2019, 207 patients with 207 CRMs were included in this retrospective study. All of them underwent renal MRI and surgical-pathologic examination. According to Bosniak classification, version 2019, all CRMs were independently classified twice by eight radiologists with different levels of experience. All radiologists were blinded to the pathology of the lesions. By using intraclass correlation coefficient (ICC), test-retest reliability was evaluated for all CRMs and for subgroups with different pathological properties (benign and malignant) and different sizes (≤40 mm and>40 mm). The test-retest reliability of 4 senior readers (≥10 years of experience) and 4 junior readers (<10 years of experience) were evaluated respectively. The comparison of ICC was performed using Z test. Results:The 207 CRMs included 111 benign lesions (83 benign cysts, 28 benign tumors) and 96 malignant tumors. There were 87 lesions with maximum diameter ≤40 mm and 120 with maximum diameter>40 mm. The test-retest reliability (ICC) of each reader for all lesions was 0.776-0.888, the overall ICC was 0.848 (95%CI 0.821-0.872). The ICCs of senior and junior readers were 0.853 (95%CI 0.824-0.880) and 0.843 (95%CI 0.811-0.871) respectively, without significant difference between the two groups ( Z=0.85, P=0.374). The ICC of all readers was 0.827 for benign lesions and 0.654 for malignant lesions, showing significant difference ( Z=2.80, P=0.005). The ICC was 0.770 for lesions ≤40 mm and 0.876 for lesions>40 mm, which was significantly different ( Z=-2.36, P=0.018). For CRM subgroups with different pathological properties and different sizes, there was no significant difference in test-retest reliability between senior and junior readers (all P>0.05). Conclusion:The test-retest reliability of MRI criteria in the 2019 Bosniak classification of CRMs is excellent and unaffected by readers′ experience. The reliabilities are not consistent among CRMs of different pathological properties and different sizes, but all reached the level of good and above.
