Comparison of dynamic contrast-enhanced-magnetic resonance imaging parameters and serum markers in preoperative rectal cancer evaluation: Combined diagnostic value

Figure 4 Analysis of dynamic contrast-enhanced-magnetic resonance imaging parameters and serum tumor markers in rectal cancer patients by differentiation status. A: Examination of rate constant levels in poorly differentiated vs moderately to well-differentiated groups; B: Assessment of volume transfer constant levels in poorly differentiated vs moderately to well-differentiated groups; C: Evaluation of volume fraction of extravascular extracellular space levels in poorly differentiated vs moderately to well-differentiated groups; D: Analysis of serum carbohydrate antigen 19-9 concentrations in poorly differentiated vs moderately to well-differentiated groups; E: Review of serum carbohydrate antigen 125 concentrations in poorly differentiated vs moderately to well-differentiated groups. Ktrans: Volume transfer constant; Kep: Rate constant; Ve: Volume fraction of extravascular extracellular space; CA: Carbohydrate antigen; L: Low; M: Median; H: High.