Assessment of periappendiceal fat density attenuation for the severity of appendicitis
10.3969/j.issn.1002-1671.2025.05.014
- VernacularTitle:阑尾周围脂肪密度衰减对阑尾炎严重程度的评估
- Author:
Li HE
1
;
Song XU
1
;
Yilin CHEN
1
;
Mei ZHANG
1
Author Information
1. 浙江省人民医院毕节医院放射科,贵州 毕节 551700
- Publication Type:Journal Article
- Keywords:
appendicitis;
fat density attenuation;
relative CT value
- From:
Journal of Practical Radiology
2025;41(5):780-784
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the correlation between the attenuation of periappendiceal fat density and its relative CT value(rCT)with the severity of appendicitis,and whether rCT can evaluate the severity of acute appendicitis(AA).Methods A retro-spective selection was made of 79 patients who underwent whole-abdominal CT scans and were pathologically diagnosed with A A(45 with noncomplex A A,34 with complex AA)and 30 normal control group(NCG).Appendicitis-associated signs were recorded and the CT number of periappendiceal fat(CTa),CT number of mesenteric fat gap(CTm),CT number of abdominal anterior wall subcutaneous fat(CTaw),CT number of abdominal posterior wall subcutaneous fat(CTpw),CT number of retroperitoneal fat(CTrp),CT number of gluteal subcutaneous fat(CTgl),and CT number of psoasmajor muscle(CTps)were measured.The ratio of CTa to the CT values of the other 6 parts were calculated,defined as the rCT.Statistical analysis was performed using SPSS 20.0 soft-ware,and the differences were considered statistically significant at P＜0.05.Results Compared among the three groups,statistical differences were found between every two groups in CTa,rCTm,rCTaw,rCTpw,rCTrp,rCTgl,and rCTps(P＜0.05),and the rCT was the lowest in complex AA,followed by noncomplex A A.Receiver operating characteristic(ROC)curve analysis showed that rCTm,rCTaw,rCTpw,rCTrp,rCTgl,rCTps had diagnostic predictive value for both noncomplex AA and complex AA(P＜0.05).Conclusion The attenuation of periappendiceal fat density is associated with the severity of appendicitis,and rCT has certain diagnos-tic predictive value for assessing the severity of appendicitis.The diagnosis of noncomplex AA and complex AA is based on the 95％ confidence interval of rCT.
