◁think▷I need to write a 50–80 word English description of the composite LF-NMR image of apple #523, focusing on internal moisture distribution, tissue structure, signal intensity, and patch morphology. I should avoid using certain prohibited words like 'healthy', 'diseased', 'mild', 'severe', 'normal', 'abnormal', 'ground-truth', or 'label'. I should only provide a plain descriptive text without any extra explanations or JSON output.

Let me analyze the image and think about what I can describe:

1. Internal moisture distribution: The image shows variations in gray tones, which likely correspond to different moisture levels within the apple tissue. Darker areas might indicate higher moisture content, while lighter areas might indicate drier regions.

2. Tissue structure: The circular patterns in the image resemble cross-sections of apple tissue. The texture appears granular, suggesting the cellular structure of the apple's flesh.

3. Signal intensity: In LF-NMR imaging, signal intensity correlates with water content. Areas with higher moisture would show brighter signals, while drier areas would be darker.

4. Patch morphology: There appear to be some irregular patches or variations in the tissue structure. These could represent natural variations in the apple's growth or potential areas of differing moisture distribution.

Based on these observations, I'll craft a concise description that captures these elements without using prohibited terms. I'll focus on the visual aspects of the image and what they might indicate about the apple's internal properties.◁/think▷The composite LF-NMR image of apple #523 displays distinct variations in internal moisture distribution, with darker regions suggesting drier tissue and brighter areas indicating higher water content. Tissue structure appears granular with irregular cellular patterns visible throughout. Signal intensity differences correlate with moisture levels, showing brighter regions in areas of higher water concentration. Patch morphology reveals natural tissue irregularities and localized variations in density, with some circular regions displaying more pronounced structural details than others. The overall image provides a detailed cross-sectional view of the apple's internal composition through non-destructive imaging techniques.