The clinical application value of 1.5T MR multiple sequence inspection on the small hepatocellular carcinoma of CT equidensity

Objective To explore diagnostic value and clinical significance of 1.5T MR multisequence inspection in hepatoma of equidensity scanning. Methods This retrospective study involved the patients admitted between January 2015 and January 2018.A total of 20 patients(22 lesions)who underwent the small hepatocellular carcinoma and the equidensity scanning image of CT were confirmed by postoperative pathology, follow-up or transcatheter arterial chemoembolization.All Patients were performed by 1.5T MR scanning(T1WI, T2WI, DWI)and enhancement scanning.Analyse The signal characteristics of each sequence and the way of strengthening of MR scanning were analyzed. Results The most small hepatocellular carcinoma had the feature of long T1 and long T2 signal and shallow location, The displayed rates of the small hepatocellular carcinoma in T1WI, T2WI, DWI equence, Arterial phase and portal phase are 72.7%, 81.8%, 100%, 90.9%, 81.8%.The most lesions had the characteristics of rich blood supply and fast in fast out, especially DWI sequence had the highest displayed rate, Combined the characteristics of enhanced scanning strengthening, mostly the small hepatocellular carcinoma were recognized. Conclusion 1.5T MR can find the small hepatocellular carcinoma of CT equidensity early, avoid misdiagnosis, DWI has the highest positive rate among all the multisequence inspection, combined with the MR enhancement scanning, the detection rate and diagnosis rate of the small hepatocellular carcinoma are obviously improved. Key words: 1.5T MR multisequence inspection; Equidensity scanning image; Small hepatocellular carcinoma; Missed diagnosis; Hepatoma