Experimental medical-imaging poster showing a precise 3×3 grid of nine axial brain scan images against a completely pure black background. Each scan should have the same vertically oriented oval composition, centered at equal spacing with generous black gaps between the rows and columns. Show recognizable anatomical brain structures, skull boundaries, ventricles and cortical folds, but render every scan as a false-color scientific heatmap rather than a grayscale MRI. Give each brain slice a distinct pseudo-color palette while keeping the anatomy consistent: red, orange, yellow and green; olive, brown, cyan and pale green; electric blue, violet and magenta; rust, deep blue and turquoise; saturated cobalt blue with pale lavender structures; neon green, yellow, coral and white; purple, cream and dark brown; deep blue, red and emerald green; orange, yellow, black and violet. Use glowing color bands, high-contrast edges, fine pixel noise, scan-line artifacts, slight chromatic bleed and low-resolution medical-monitor texture. Each brain should feel like a different processing mode or neurological dataset. Keep the grid perfectly ordered and symmetrical. No labels, no numbers, no patient information, no UI, no arrows, no text, no logos, no watermark. Pure black background, no surrounding objects, no photorealistic head, no external anatomy, no decorative frame.