[Clinical application of percutaneous iliosacral screws combined with pubic ramus screws in Tile B pelvic fracture].

Objective: To investigate the application and effect of minimally invasive percutaneous anterior pelvic pubic ramus screw fixation in Tile B fractures.

Methods: A retrospective review was conducted on 56 patients with posterior pelvic ring injury combined with fractures of anterior pubic and ischiadic ramus treated between May 2010 and August 2015, including 31 males and 25 females with an average age of 36.8 years old ranging from 35 to 65 years old.

[Adaptive regularized super-resolution reconstruction for magnetic resonance images].

To increase the resolution and signal-to-noise ratio (SNR) of magnetic resonance (MR) images, an adaptively regularized super-resolution reconstruction algorithm was proposed and applied to acquire high resolution MR images from 4 subpixel-shifted low resolution images on the same anatomical slice. The new regularization parameter, which allowed the cost function of the new algorithm to be locally convex within the definition region, was introduced by the piori information to enhance detail restoration of the image with a high frequency. The experiment results proved that the proposed algorithm was superior to other counterparts in achieving the reconstruction of low-resolution MR images.

[Repair of radius bone defect with the nano-hydroxyapatite/collagen/calcium alginate].

Objective: To explore the osteogenic potential of the nano-hydroxyapatite/collagen/calcium alginate composite implanted in animals.

Methods: Eighteen 3-month-old New Zealand white rabbits were adopted to prepare 15 mm segmental defect model at the middle part of radius. Rabbit models were randomly divided into experimental group and blank control group.

[Adaptive super resolution algorithm for under-sampled images].

A new algorithm of adaptive super-resolution (SR) reconstruction based on the regularization parameter is proposed to reconstruct a high-resolution (HR) image from the low-resolution (LR) image sequence, which takes into full account the inaccurate estimates of motion error, point spread function (PSF) and the additive Gaussian noise in the LR image sequence. We established a novel nonlinear adaptive regularization function and analyzed experimentally its convexity to obtain the adaptive step size. This novel algorithm can effectively improve the spatial resolution of the image and the rate of convergence, which is verified by the experiment on optical images.

[Use of L-shaped silicone prosthesis and expanded polytetrafluoraethylene to repair the nasal deformities after repair of unilateral cleft lip: report of 17 cases].

Purpose: To evaluate the effect of using L-shaped silicone prosthesis and expanded polytetrafluoraethylene (ePTFE) to correct the nasal deformities after repair of unilateral cleft lip in 17 cases.

Methods: After correction of the malposed nasal cartilages, a chip of ePTFE was added to the tip of the L-shaped silicone prosthesis, and sutured with 5-0 nylon thread, to consolidate and mold the nasal dorsum, tip, ala and nasal columella.

Results: Simultaneous use of L-shaped silicone prosthesis and expanded polytetrafluoraethylene could elevate the flat nasal dorsum, tip, ala and nasal columella, which improved the nasal contour significantly.