Objective To explore effect of aspirin on plasma levels of nitric oxide (NO) and alpha-granule membrane (GMP-140) protein in patients with acute cerebral infarction.Methods 78 patients with acute cerebral infarction were randomly divided into the aspirin group (40 cases) and the control group (38 cases).Plasma NO and GMP-140 were determined by the method of nitrate reductase and enzyme-linked immunosorbent assay in aspirin group and controls at moment of hospitalization and after two weeks.Results Plasma NO and GMP-140 of aspirin group after aspirin treatment were statistically lower than those of controls (P

Objective To compare the set up errors derived from different registration methods of the X-ray volume imaging (XVI) system for radiotherapy in the treatment of middle/lower-segment esophageal cancer, and to provide a reference for radiation treatment of esophageal cancer. Methods We randomly selected 63 patients with middle/lower-segment esophageal cancer, and obtained their reconstructed XVI images at the first therapy to perform automatic registration with gray-value and bone registration methods. We acquired and compared the three translation errors (along x [left to right], y [head to feet], and z [front to back] axes) and three rotation errors (around the x, y, and z axes) derived from the two registration methods. Results Gray-value registration had significantly smaller translation errors along the x and z axes than bone registration (x azes t = −2.78, z azes t = −2.15, P < 0.05), but there was no significant difference along the y axes (P > 0.05). The rotation errors around the three axes were all smaller than 1°, and were smaller with gray-value registration than with bone registration, but without significant differences (P > 0.05). Conclusion We recommend gray-value registration for radiotherapy in the treatment of middle/lower-segment esophageal cancer. Manual verification or fine-tuning is recommended after automatic registration in clinical practice. Besides translation errors, rotation errors should also be paid attention to.