Objective To investigate the effects of different delay time on examination results of patients with suspected cervical cancer after injection of contrast agents.Methods A total of 120 patients with suspected cervical cancer were selected and randomly divided into 20 s group,70 s group,90 s group and 120 s four groups.Patients in four groups were injected with non-ionic contrast agent iohexol(300 mgl/mL)90 mL,and the injection rate was 2 mL/s.Patients in four groups started the scanning at 20 s,70 s,90 s and 120 s after injection,and each group was scanned for 240 s.Arterial developing rate,venous developing rate,the positive rate of detection for cervical cancer,accuracy rate of stage for cervical cancer,and accuracy rate of tumor lymph node metastasis were compared between four groups.Results The results showed that the longer the delay time was,the higher the rate of venous developing was and the lower the rate of arterial developing was,and there were significant differences between the four groups(P<0.05).There was no significant difference in the positive rate of cervical cancer between the four groups(P>0.05).There was significant difference in accuracy rate of stage for cervical cancer between four groups(P<0.05),and there was no significant difference in accuracy rate of tumor lymph node metastasis between four groups(P>0.05).Conclusion Different delay time has affect the results of patients with suspected cervical cancer after injection of contrast agents.

Objective To investigate the effects of different delay time on examination results of patients with suspected cervical cancer after injection of contrast agents.Methods A total of 120 patients with suspected cervical cancer were selected and randomly divided into 20 s group,70 s group,90 s group and 120 s four groups.Patients in four groups were injected with non-ionic contrast agent iohexol(300 mgl/mL)90 mL,and the injection rate was 2 mL/s.Patients in four groups started the scanning at 20 s,70 s,90 s and 120 s after injection,and each group was scanned for 240 s.Arterial developing rate,venous developing rate,the positive rate of detection for cervical cancer,accuracy rate of stage for cervical cancer,and accuracy rate of tumor lymph node metastasis were compared between four groups.Results The results showed that the longer the delay time was,the higher the rate of venous developing was and the lower the rate of arterial developing was,and there were significant differences between the four groups(P<0.05).There was no significant difference in the positive rate of cervical cancer between the four groups(P>0.05).There was significant difference in accuracy rate of stage for cervical cancer between four groups(P<0.05),and there was no significant difference in accuracy rate of tumor lymph node metastasis between four groups(P>0.05).Conclusion Different delay time has affect the results of patients with suspected cervical cancer after injection of contrast agents.

Objective:To design a new type of intelligent power-assisted hip disarticulation prosthesis and to use experiments to verify its kinematic performance.Methods:The main body of the prosthesis was designed using a double parallel four-link configuration based on a remote motion center mechanism. A series elastic actuator was used to provide external power for the prosthesis, and an antagonistic torsion spring structure was used to achieve bidirectional energy storage assistance in hip flexion and extension. A control system based on impedance control was established. By setting up an auxiliary force field to compensate for the difference between the actual angle of the prosthesis and the target angle, the prosthesis assist function was realized. Finally, the traditional hip disarticulation prosthesis was used as a comparison to test the overall performance of the new intelligent power-assisted hip disarticulation prosthesis worn by normal people.Results:For the new smart-assisted hip-disarticulation prosthesis, the goodness-of-fit of its hip joint angle curve to that of a normal person was 86%, which was 14% higher than that of the traditional hip-disarticulation prosthesis (72%). The goodness-of-fit of the healthy-side angle of the new smart-assisted hip disarticulation prosthesis to the normal human was 94%, which was the same as that of the traditional hip disarticulation prosthesis.Conclusions:A new type of intelligent power-assisted hip disarticulation prosthesis is designed to realize the function of prosthesis-assisted movement.