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Objective To assess the capability of monochromatic energy images of Gemstone spectral imaging(GSI) in reducing artifacts caused by metallic implants. Methods Twelve subjects with metallic implants underwent GSI (Discovery CT750 HD, GE Healthcare, Milwaukee ). The metallic orthopedic implants included 3 patients of dentures, 2 patients of cervical spinal vertebraplasty, one clavicle fracture fixation, one lumbar spinal vertehraplasty, 3 patients of artificial femoral head, one iliac fracture fixation and one tibial fracture fixation. GSI was performed by using a single source ultra-fast dual energy X-ray switching (80 kVp and 140 kVp). Following GSI scanning, thin slice images were reconstructed into 1.25 mm slice thickness. The monochromatic energy images were set to the same window width and level (window width 1500 HU,window level 500 HU). The artifact indexes (AI) at different kiloelectronvolts (keV) images were measured and compared. 3D reconstruction was performed using images with minimal AI. Result The artifacts index on monochromatic energy images varied with the change of keV. Of the images from 12 subjects, the maximal AI ranged between 145-225 at 40 keV, and minimal AI ranged between 15-90 at the 95-140 keV. The artifacts are clearly visible on polychromatic energy images and the artifacts are reduced markedly on the monochromatic energy images with minimal AI. Conclusion The artifacts caused by metallic implants can be reduced significantly by GSI with high keV monochromatic energy images.
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Objective To observe clinical effect of treating urinary calculi with Lithagogue decoction combined with western medicine. Methods 32 cases patients with urinary calculi were randomly recruited into a control group and a treatment group. The control group was treated with anisodamine, ivgtt, and progesterone, im, and the treatment group was treated with lithagogue decoction based on the control group. The clinical effect was observed in both groups. Results The clinical effect was 93.8% and 68.7% in the treatment group and the control group respectively, the difference showing statistic significance (χ~2=3.459, P<0.05) .Conclusion The treatment of urinary calculi with Lithagogue decoction combined with western medicine is better than with western medicine only.
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Objeetive To analyze the attenuation differences of left yentricular myocardium on 64-slice CT coronary artery angiography in adults.Methods of 1130 consecutive patients,119 patients (65 males,54 females,ranged from 27 to 83 years with mean age of 52 years)with no stenosis or stenosis less than 25% in the left anterior descending arteries were enrolled.The standard axial image with 3mm slice thickness just below the aorta valve was selected for measttrement.The regions of interest(0.1 cm× 0.1 cm)in posterior interventricular septum(septal P),anterior interventricular septum(septal A),apex,anterior free wall and posterior free wall of the left ventricle were selected within the myocardium and the mean CT value wag measured.A paired Student t test was used for the comparison of CT values in different areas,P value under 0.05 was considered statistically significant.Results The megn attenuafion of the apical region(69.9±15.5)HU was lower than that of septal A(91.9±15.1)HU(t=11.060,P＜0.01)and anterior free wall(79.7±16.9)HU(t=4.639,P＜0.01),the mean attenuation in septal(93.8±14.8)HU and posterior free wall(88.0±14.3)HU showed relatively higher values.The myocardial intensity attenuation presented as a U-shape in the left ventricular myoeardium. Conclusions The mean attenuation in the left ventrieular myoeardium demonstrates as U-shape during the coronary artery angiography examination in normal adults.This can be helpful for iudging the extent of myocardial infarctiotr.
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[Objective]To study the operative methods and effects of limb salvage with rotating hinge prosthesis replacement for malignant tumors around the knee.[Method]Limb salvage surgery with rotating hinge prosthesis replacement were performed in 14 patients with malignant bone tumors around the knee.There were 9 cases in distal femoral,5 cases in proximal tibia.[Result]Forteen patients were followed up for 17~65 months(averaged,4 months).The satisfactory rates were 85.7%,the extension and flexion spheres of knee activity were respectively 0? and 90?~130?(averaged,110?).There was recurrence in one patient after operation,infection one;prosthetic loosening one.[Conclusion]Application of rotating hinge prosthesis knee replacement in limb salvage treatment of malignant tumor around the knee is an effect method.It is an effect method for the treatment of malignant tumor of the knee by using rotating hinge prosthesis.It can decrease the strength of the bone-prosthetic and the incidence of the occurrence of fatigue fracture and the loosening of prosthetic.
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Objective To study the efficacy of interferon Alfa-lb( IFN?-lb) combined with lamivudine in the treatment of chronic hepatitis B. Methods 103 patients with chronic hepatitis B were divided into three groups which were comparable.30 patients were treated with IFN?-lb for about 6 months;38 patients were treated with lamivudine for about 12 months; And the last 36 patients were treated with IFN?-lb and lamivudine. The serum ALT,HBV-DNA,HBV-Marks were studied using electrochemiluminescence technique,fluorescent quantitation poly-merase chain reaction(PCR) and so on. Results The serum level of ALT,HBV-DNA and HbsAg in patients which were treated with IFN?-lb and lamivudjne showed significantly lower than the other groups(P
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Objective To compare the feasibility of multi-slices computed tomography(MSCT)versus coronary angiography(CAG)for identification of myocardial bridges and mural coronary artery(MB-MCA).Methods For 76 patients suspecting coronary heart disease the MSCT and CAG were performed for the coronary imaging.The MB-MCAs were identified on the CT images and angiograms by radiologists and cardiologists separately and independently before and after consulting each other.The data was statistically analyzed using ?2-squrae test.Results Before consulting each other,29 MB-MCA in 27 patients and 2 MB-MCA in two cases were detected using MSCT and CAG by radiologists and cardiologist separately and independently with significant difference statistically(?2=10.52,P