ABSTRACT
Objective To explore the value of post processing technique of dual source CT in diagnosing peripheral PE.Methods One hundred and fifty patients with suspected PE were underwent dual source CT scan,and 20 of the all patients met the criterion. The raw CT data were reconstructed by the pulmonary embolism detection (PED)software,double energy perfusion imaging (DEPI)and CT pulmonary artery angiography (CTPA).The PED,DEPI and CTPA map were analyzed by 2 senior doctors in cardiovascular diagnosis profession.According to the diagnosis standard of PE,the location,number of the emboli in segmental and sub-segmental pulmonary arteries were respectively recorded on the PED and DEPI map.We calculated the detection rate,evaluated the significant difference and evaluated the diagnosis consistency between the DEPI and CTPA map.Results Emboli were found in 30 segmental and 40 sub-segmental arteries on the CTPA map with the detection rate of 7.50% and 5.00%,respectively.Emboli were found in 48 segmental and 62 sub-segmental arteries on PED map with the detection rate of 12.00% and 7.75%,respectively.There was significant difference between the CTPA and PED map (χ2 =4.60,5.06,P<0.05).The DEPI and PED map had higher consistency in diagnosing PE.The Kappa coefficient was 0.94 if the PED map was regarded as the reference standard,Among 48 cases with segmental PE detected by the PED map,there were 13 cases of complete filling defects and 35 cases of partial filling defects.Among 13 cases of complete filling defects,there were perfusion defect in 10, and perfusion thin in 3 on the DEPI map.Among 35 cases of partial filling defects,there were perfusion defect in 2,perfusion thin in 29,and perfusion normal in 4 on the DEPI map.Conclusion The PED map combined the DEPI map of dual source CT can significantly improve the diagnosis rate of peripheral PE and has a high clinical value.
ABSTRACT
Objective To explore the clinical value of monoenergetic technology of dual-source CT in removing the artifact of me-tallic fixation after the operation of lumbar spondylolysis.Methods 24 cases of patients with metallic fixation after operation of lum-bar spondylolysis were scanned by dual-energy CT.To reconstruct the imaging using monoenergetic and 3D Inspace software,obtain 50,80,110,140,170 keV five groups of images and the multi-planar reconstruction*(MPR),volume vendering(VR),maximum intensity projection(MIP)imaging in different conditions.The five groups image and average weighted 120kev image are evaluate by two senior radiologist.The quality score of five groups of images and the average weighted images are analyzed statistically using Kruskal-Wallis test.The clinical value of images in the optimal condition are evaluated by two senior department of orthopedics phy-sicians.The results of two radiologists and department of orthopedics physician are examined by kappa test to evaluate consistency. Results In all patients after operation,the case of 110keV images above 3 points is 24,the case of 80keV images above 3 points is 14,the case of of 140keV images above 3 points is 13,the case of weighted average 120kev images above 3 points is 8.Images in 110keV have the best quality (F=98.523,P<0.01).MPR,VR,MIP images are reconstructed in 110keV.The ratio of image which are excellent and have high clinical value is 86.1%,especially the ratio of MPR image is 100%.Conclusion Monoenergetic technology of dual-source CT has a higher clinical value in removing the artifact of metallic fixation after the operation of lumbar spondylolysis.Under the condition of 110keV the quality of images are best,the reconstructed images using MPR Technology have the best clinical value.
ABSTRACT
Objective To explore the technical advantages and clinical value of dual-source and image re-construction technique application in lumbar spondyloschisis without sliding .Methods 36 cases of patients with LSWS were collected who were examined by dual-source CT scan and diagnosed definitely .18 cases of patients were examined by X-ray( including lumbar vertebrae and double oblique ) .The diagnosis rate of X-ray and CT scanning in diagnosing LSWS were calculated ,which was made statistical analysis .The image of 36 cases patients with LSWS were reconstructed by multi-planar reconstruction ( MPR) ,volume rendering technique ( VR) and curved planar reconstruc-tion( CPR) .The display rate was calculated , which was made statistical analysis according to various image recon-struction in diagnosing LSWS .Results 7 cases of patients with LSWS were found by X-ray examination .36 cases of patients with LSWS were found by dual-source CT examination .The display rate was 38.9%and 100.0%.71 LSWS were found in 36 cases of patients with LSWS ,35 cases were bilateral spondylolysis ,1 case was unilateral spondylolys-is.In several image reconstruction methods ,CPR and cutting VR showed the highest rate in diagnosing LSWS ,which was 100.0%.The symptom of LSWS in X-ray examination:local thinning and structural disorder in lumbar spondylol-ysis,cortical discontinuity .The symptom of LSWS in CT examination were as follows:clear linear low density shadow in lumbar,ends hardening and bone fragments in some case .Conclusion The dual-source CT and its image recon-struction technology have the technological superiority and higher clinical value in diagnosing LSWS ,which is crucial to prevent LSWS misdiagnosed ,and could become the preferred examination in screening and diagnosing LSWS .
ABSTRACT
Objective To explore the risk factors of female breast cancer and provide the basis for the etiology of female breast cancer,the identification of the high-risk population and the development of effective intervention measures.Methods The breast cancer patients who were confirmed by pathology were collected,and screened for healthy women whose age and living environment were similar to breast cancer patients.The questionnaire was used to collect risk-factors of breast cancer.The x2 test were used to analyze statistical difference of case group and control group.1 ∶ 2 logistic regression was used to analyze the relationship between risk factors and female breast cancer.Results There were 184 breast cancer patients and 368 healthy women in research.Benign breast disease,breastfeeding,abortion,depression,smoking,passive smoking,eating fried or smoked foods,drinking tea had statistical differences between case group and control group.And benign breast lesions(OR =1.553,95％ CI 2.045 ～ 10.924),abortion(OR =0.775,95 ％ CI 1.423 ～ 3.309),smoking(OR =0.674,95％ CI 1.009 ～ 3.817) passive smoking (OR =2.98,95％ CI 1.680 ～ 3.720) were the risk factors of breast cancer,and drink tea(OR =-0.425,95％ CI 0.446 ～ 0.958),eating soy products (OR =-0.687,95 ％ CI 0.284 ～ 0.889) breast-feeding (OR =-0.827,95％CI 0.193 ～ 0.991) were the protective factors of breast cancer.Conclusion The risk factors of female breast cancer in Binzhou are benign breast disease,abortion,passive smoking,depression,and the protective factors are drinking tea and breast-feeding.