The generator matrix

 1  0  0  1  1  1  0  1  1  1  2 X+2  1 X+2  2  1  X  1  1 X+2  1  X  X  1  1  1 X+2  1  X  X  0  1  1  0  1 X+2  1  X  1  1  1  1  0  1  0  1  1  1  1  2  1
 0  1  0  0  1  1  1  2 X+3  X  1  1 X+1  0  1 X+2  1  X  1  X X+1  2  1  X  1  3  1  1  1  1  0 X+3  2  1  2  1  0  1 X+2  2 X+1  X X+2  0  1 X+3  3  3 X+2  1  X
 0  0  1 X+1 X+3  0 X+1  X X+2  3  1 X+3  1  1 X+2  0 X+2 X+3  1  1  0  1 X+2  X X+3 X+2 X+1  2  1  2  1 X+1 X+3  X  1  3  0 X+3  3  3  3 X+1  1 X+2  0 X+1  2  0  1 X+3 X+2
 0  0  0  2  0  0  0  2  2  0  0  2  2  2  2  0  2  2  2  2  2  0  0  0  2  0  0  0  2  0  0  0  0  2  2  2  2  0  2  0  2  2  2  2  2  0  2  2  2  2  0
 0  0  0  0  2  0  2  0  0  0  0  0  0  0  0  2  2  0  0  2  2  2  0  2  2  2  2  0  0  2  0  0  0  2  2  2  2  0  2  2  2  0  2  0  0  2  2  0  0  2  0
 0  0  0  0  0  2  0  0  0  2  0  2  0  2  2  2  0  2  2  2  0  0  2  0  2  2  2  0  0  0  2  0  0  2  0  0  2  2  2  2  0  0  0  2  2  2  2  0  2  0  0

generates a code of length 51 over Z4[X]/(X^2+2,2X) who´s minimum homogenous weight is 45.

Homogenous weight enumerator: w(x)=1x^0+112x^45+237x^46+324x^47+403x^48+456x^49+486x^50+396x^51+384x^52+324x^53+230x^54+272x^55+186x^56+112x^57+96x^58+28x^59+16x^60+20x^61+5x^62+4x^63+2x^64+2x^66

The gray image is a code over GF(2) with n=204, k=12 and d=90.
This code was found by Heurico 1.16 in 0.562 seconds.