| Objective: To explore the correlation of characteristic images of hepatic cystic hydatid disease by CT,and to understand the natural course of the disease by the imaging basis of the disease.Methods: CT examination of 12 patients with hepatic cystic hydatid disease without drug or surgical intervention,re-examination of CT,observation of cyst size and position,CT value in the capsule,the highest CT value in the calcification of the capsule wall,calcification degree,shape,location The thickness of the thickest part of the capsule wall was measured again by the same observer 12 months later,and the consistency of the two measurements was compared.Combined with the method of observational research,28 CTs of 12 patients were observed to investigate hepatic hydatid The natural course of the disease.Results: 1.Of the 12 patients in this group,9 were male and 3were female;3 patients were younger than 40 years old,6 patients were 40-70 years old,and 3 patients were older than 70 years old,with an average age of 56.58 ± 16.28.3 patients had cysts in the left outer lobe,1 patient had cysts filling the entire left lobe,1patients had cysts in the hilar region,2 patients had cysts in the right anterior lobe,and 4 patients had cysts in the right posterior lobe.One patient was a thoracic and abdominal cavity hydatid.In all 12 cases,the cysts were single.The largest diameter of the liver cyst was 12.5 cm,and the smallest diameter of the liver cyst was 2.7 cm,with an average of 6.34 ± 2.87.The morphology of hydatids was round,round-like,and irregular.Among the 12 patients,the CT value of the liver tissue around the hydatid scan phase was 75 HU,the minimum value was 40 HU,and the average value was 42.5 ± 30.07 HU.The CT value of the liver tissue around the hydatid arterial phase was 84 HU and the minimum value is 40 HU,with an average of53.73 ± 9.914 HU.Among all patients,there were 8 patients with calcification of hydatids,of which 8 had calcification of the outer capsule wall,accounting for 61.5% of the total number of patients,and 3 had calcification of the outer capsule wall and intracapsular calcification,accounting for 27.3% of the total number of patients.Among the patients with cystic wall calcification,there were 3 CE1 type hydatids and 5CE4 type hydatids.One of them had CE4 type CE5 type hydatid after 12 months.Among them,2 had calcifications in the form of brain signs,accounting for 25%.There were 1 patient with calcified calcification,accounting for 12.5%,2 patients with flaky calcification,accounting for 25%,and 1 with curved calcification,accounting for 12.5% There were 2 cases of eggshell sign,accounting for 25%.2.The relationship between the CT value at the highest calcification of the outer capsule wall and the time change was statistically significant(P <0.05).3.The relationship between the CT value of the highest calcification in the capsule and the change of time was not statistically significant(P> 0.05).The change of CT value in the capsule of patients with calcification of the capsule wall during the plain scan period was statistically significant(P <0.05).5.There was no statistically significant change in CT of the patients with intra-cystic calcification during plain scan(P> 0.05).6.The change of the thickest part of the capsule wall in patients with external calcification was statistically significant(P <0.05).CONCLUSIONS:(1)When calcification of hydatid cysts,the highest CT value in the calcification of the cyst wall increases the CT value of the cyst fluid and decreases the intravesicular activity.(2)During the calcification of hydatid cysts,when the thickest part of the cyst wall was thicker than before,the CT value of the cyst fluid increased and the intracellular activity decreased. |
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