Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Fractional change in the longitudinal relaxation rate R1 for C38 and C26a tumors 3 minutes before the start of carbogen breathing, during carbogen breathing, and after the termination of carbogen breathing. *Significant difference (P < .05) between the control group and the carbogen breathing group. **Significant difference (P < .01) between the control group and the carbogen breathing group. ¤Significant difference (P < .01) between C38 and C26a tumors. The error bars indicate SEM.
