ABSTRACT
Objective Toexploretheimagingcharacteristicsofileocecaltuberculosisbycontrast-enhancedCT.Methods TheCT findingsof16ileocecaltuberculosispatientswereretrospectivelyanalyzed.AllcasesunderwentplainandenhancedCTscan.Results 14casesshowedinhomogeneousthickeningoftheintestinalwallandnarrowingofthelumen,and2casesshowedextensiveanduniform thickeningoftheintestinalwallwithnoobviousnarrowingofthelumen.Theenhancedimagesshowedthat13caseswereobviously heterogeneousenhancement,2caseswerering-likeenhancement,and1casewashomogeneousenhancement.Blurredserosasurface wasseeninallpatients,withsurroundingexudationin14casesandperitoneuminvolvementin12cases.Inallcases,enlargedlymph nodeswerefoundneartheabdominalaortaandonmesentery,withhomogeneousenhancementin10cases,annularenhancementin5casesand calcificationin1case.Conclusion Ileocecaltuberculosisismainlycharacterizedbyinhomogeneousthickeningandheterogeneousenhancementofthe intestinalwall,aswellasnarrowingofthelumen.Thereisoftenobviousexudationaroundtheintestines.Ileocecaltuberculosisoften combineswithenlargedlymphnodesandintrapulmonarytuberculosis.TheenhancedCTscanisofgreatvaluefortheevaluationofileocecal tuberculosis.
ABSTRACT
Objective To evaluate the value of multimodal MRI in differential diagnosis of lung squamous cell carcinoma and adenocarcinoma.Methods Routine sequence,diffusion weighted imaging(DWI)and dynamic enhancement images about 1 6 squamous cell carcinoma and 21 adenocarcinoma patients were analyzed retrospectively.Taken a record about the size,edge,internal signal, enhancement types and apparent diffusion coefficient(ADC)values when b=600 s/mm2,and the difference in the degree of pathological differentiation was studied.Results The average diameter of squamous cell carcinoma was (4.17±2.0)cm,while adenocarcinoma was (3.81±1.8)cm,lobulated and spiculation were the most common signs in both of them.Squamous cell carcinoma showed low T1signal in 12 cases(75%),low T2signal in 7 cases(43.7%),adenocarcinoma showed high T1signal in 10 cases(47.6%),high T2 signal in 14 cases(66.7%).Squamous cell carcinoma had lower ADC value than adenocarcinoma(1.27×10-3mm2/s vs 1.38×10-3mm2/s), and well differentiated tumors had higher ADC values than poor ones,it was statistically significant.The most common time-signal intensity curves were type A in squamous cell carcinoma(62.5%)and type B in adenocarcinoma(50%).Conclusion MRI findings of squamous cell carcinoma and adenocarcinoma are associated with the biological characteristics,squamous cell carcinoma has shorter T2signal and adenocarcinoma has shorter T1signal.Squamous cell carcinoma has lower ADC value than adenocarcinoma and is dominated by outflow curve (type A),these features are helpful in subtype and differential diagnosis.
ABSTRACT
Objective To detect the important parameters of three dimensional structure of the aortic annulus by using real time three dimensional transesophageal echocardiograhy (RT 3D TEE) and analyse morphological and physiological characteristics , in order to establish simplified model of aortic valve and provide references for designing aortic annulus .Methods A total of 95 ca‐ses of healthy individuals carrying out RT 3D TEE were selected ,and the images of total volume of aortic root were collected .The important parameters of three dimensional aortic valve in four cardiac cycles ,including sinus tube junction(S) ,distance between ad‐jacent valve junction(L ,R and N) ,diameter of the circumcircle of triangle(J) ,aortic annulus height(H) ,long diameter(A) ,short di‐ameter(B) and eccentricity ratio (B/A) of the aortic valve ,were measured by using the QLAB7 .0 software .In the 3D imaging ,the extending relationship between the bottom of aortic valve and aortic annulus was analysed ,the structural characteristics of the aortic valve were simplified ,and the model was established .Results The values of the parameters measured at the end‐diastole were as follows :sinus tube junction (26 .3 ± 3 .3)mm ,three‐dimensional aortic annulus height(12 .4 ± 1 .9)mm ,aortic valve long diameter and short diameter (25 .9 ± 2 .7)mm and (19 .8 ± 2 .0)mm ,adjacent valve junction distance(L ,R and N) all was(21 .6 ± 2 .5)mm . These three structures approximately formed an equilateral triangle .The values of the adjacent cycle time ,the change of sinus tube junction ,distance between adjacent valve junction ,aortic annulus height and long diameter were compared ,and there was no statisti‐cal significant differences(P>0 .05) ,while statistically significant differences were found in the aortic valve short diameter and long short diameter between those at the end‐diastole and those at the medium‐systole(P<0 .01) .Conclusion RT 3D TEE can accu‐rately measure the size of each part of the aortic valve and display its shape and change ,which contribute to simplifying and recon‐structing the aortic annlus .