Table 1.

Fischer’s scoring system.

Points	0	1	2
Shape	Round Oval	Linear Irregular	–
Margin	Well-defined	Ill-defined	–
KM patterns	Homogeneous	Inhomogeneous	Ring-like (centripetal enhancement)
Initial enhancementa	<50%	50–100%	>100%
Postinitial enhancementb	Continuous increasec	Plateaud	Wash oute

^a(Signal_{max 1–3 min} – S_precontrast)/S_precontrast ×100 (%);

^b(Signal_{8 min} – Signal_{max 1–3 min})/Signal_{max 1–3 min} ×100 (%);

^cmore than +10%;

^dranging from +10 to −10%;

^eless than −10%.