Objective To explore three-dimensional ultrasonographic features of common ocular diseases. Methods To acquire the data, the free-hand scanning without positioning system was employed in 3 to 5 seconds. Following or after acquisitions, the data were processed and 3D image was reconstructed. Then three-dimensional ultrasonographic features of ocular diseases were characterized. Results 3D images were rendered successfully on 46 eyes of 48 ones. The reconstruction of 3D ultrasonography provided clear stereo images in which shape, dimension, structure, location of retinal detachment, choroidal detachment, vitreous fibrous membrane, lens dislocation, intraocular foreign body and intraocular trauma could be clearly demonstrated. Conclusions 3D ultrasonography needs much shorter scanning time with good space visualization. In the diagnosis of ocular diseases 3D ultrasonic reconstruction can provide more useful information than traditional 2D ultrasonography.

Objective To investigate the value of application of stent in the treatment of colorectal malignant obstruction.Methods A total of 28 cases with colorectal malignant obstruction were treated with stents in endoscopic joint X line temporarily or palliatively in the Yanhua Hospital of Beijing from May 2007 to June 2013.Intestinal obstruction ease conditions and complications were observed.Results Twenty-eight cases received with stent,and only 1 case failed.Twenty-one patients,who showed the relief of obstructive symptoms,were performed one-stage operation after 7 to 10 d.The patients recovered very well without stents shifting and intestinal perforation.Conclusion The stent treatment by endoscopic on colorectal malignant obstruction is a temporary or palliative treatment which can avoid the colostomy and improve the quality of life.It is a safe and reliable method which is worthy to be popularized.

Objective To evaluate the results of liver carcinoma treated by radiofrequency ablation(RFA) with color Doppler ultrasonography(CDU). Methods Hemodynamic changes of the interior and periphery of 212 nodules of liver carcinoma in 152 patients were investigated by CDU one week before and one month after RFA. Results Blood flow signals were found in 187 cancerous nodules before RFA, and were chiefly from mixed arterio-venous blood supply. After RFA, the blood flow signals of these 187 cancerous nodules completely disappeared in 133, were reduced in 40 and did not change in 14. Peripherar blood flow did not change in 51.2% of the tumors. Conclusions CDU is useful in evaluating the therapeutic effect of RFA in patients with liver carcinoma and may provide information for further treatment.