The generator matrix

 1  0  0  0  1  1  1  2  0  0  1  1  0  0  1  1  2  1  1  1  0  1  2  1
 0  1  0  0  0  1  1  1  1  2  2  2  1  0  3  3  1  3  3  2  1  2  0  0
 0  0  1  0  1  1  0  3  2  1  0  3  3  1  2  1  0  0  2  2  0  0  1  0
 0  0  0  1  1  0  1  1  2  0  1  2  2  1  0  2  1  0  1  3  0  3  2  0
 0  0  0  0  2  0  2  0  2  2  0  0  2  2  0  0  0  2  0  2  0  0  2  0
 0  0  0  0  0  2  2  2  2  0  2  0  0  2  2  0  0  0  0  2  2  2  0  2

generates a code of length 24 over Z4 who´s minimum homogenous weight is 18.

Homogenous weight enumerator: w(x)=1x^0+39x^18+52x^19+81x^20+98x^21+86x^22+120x^23+98x^24+110x^25+96x^26+68x^27+68x^28+46x^29+34x^30+16x^31+5x^32+2x^33+1x^34+3x^36

The gray image is a code over GF(2) with n=48, k=10 and d=18.
This code was found by Heurico 1.16 in 0.034 seconds.