Objective To explore the application value of variable dose (VD) in full-length imaging technology for lower limb.
Methods A total of 80 patients who underwent full-length imaging of lower limbs from January to April 2021 were selected.
According to the dose mode, subjects were divided into study group A and control group B with 40 people in each group. Panoramic
imaging technology was performed in group A and group B with VD mode and constant dose mode, respectively. 20 people in group
A were randomly selected for ordinary slit splice imaging technology (A1) and high-definition slit splice imaging technology (A2),
and 20 people in group B were selected for ordinary slit splice imaging technology (B1) and high-definition slit splice imaging
technology (B2), respectively. The image quality was evaluated by three-point method. Total dose area product (DAP) and total air
specific release kinetic energy (AK) were recorded, and the mean values of each group of data were compared. The image quality
and radiation dose of each group were compared. Results The difference of total DAP between A1 and B1 groups was statistically
significant (P<0.05), and the difference of total AK between A1 and B1 groups was statistically significant (P<0.05). The difference
of total DAP between A2 and B2 groups was statistically significant (P<0.05), and the difference of total AK between A2 and B2
groups was statistically significant (P<0.05). There was no statistically significant difference in the image quality scores between A1/
B1 and A2/B2 (P>0.05). Conclusion The VD slit splice technique can reduce the radiation dose of patients when the image quality
has no obvious difference. It has the value of clinical application and promotion.
Abstract：Objective To reduce equipment failures caused by incorrect use via exploring and carrying out quality control circle (QCC)
management activities. Methods Through the analysis of the current situation, the formulation and implementation of measures,
and the use of fishbone diagrams, Plato and other tools, equipment failures caused by incorrect use can be reduced. Results The
equipment failures caused by incorrect use decreased from 64 cases to 21 cases per month through the implementation of quality
control circle activities. The target compliance rate was 107.5%, progress rate was 67.2%. Conclusion It is demonstrated that the
QCC management activities can significantly reduce equipment failures caused by incorrect use, and improve the efficiency of
medical equipment management.
