Value of quantitative microsurface structure analysis for evaluating the invasion depth of type 0-II early gastric cancer.

Background And Aim: The microsurface structure reflects the degree of damage to the glands, which is related to the invasion depth of early gastric cancer. To evaluate the diagnostic value of quantitative microsurface structure analysis for estimating the invasion depth of early gastric cancer.

Methods: White-light imaging and narrow-band imaging (NBI) endoscopy were used to visualize the lesions of the included patients.

Differential diagnosis of Helicobacter pylori-associated gastritis with the linked-color imaging score.

Background: Helicobacter pylori (H. pylori) infection in gastric mucosa is the main risk factor for gastric cancer. The purpose of this study was to assess the value of the linked-color imaging (LCI) score for the identification of H.

[Preliminary analysis on X-ray in youth neck type of cervical spondylosis with upper crossed syndrome].

Objective: To analyze the X-ray characteristics in youth neck type of cervical spondylosis with upper crossed syndrome(UCS).

Methods: The patients who had a neck type of cervical spondylosis with or without UCS were selected from January to October 2017, 20 cases in each group, and 10 normal volunteers were chosen in the study. X-ray examination of lateral and hyperextension-hyperflexion of cervical spine were performed to observe cervical spine angle, angular displacement and adjacent vertebral body slip.

Zero difference algorithm for phase shift extraction in blind phase-shifting holography.

A simple noniterative algorithm for retrieval of the unknown phase shifts in phase-shifting holography is proposed. In this algorithm, the phase shift value between two phase-shifting holograms can be calculated through a simple analytical formula that is derived according to the fact that there exist some points whose intensity difference between two phase-shifting holograms is equal to zero. Both the simulated and experimental results demonstrated the feasibility of this so-called zero difference algorithm over a wide range of phase shifts.