◁think▷I need to write a 50–80 word English description of the composite LF-NMR image of apple #115, focusing on internal moisture distribution, tissue structure, signal intensity, and patch morphology. I should avoid certain prohibited words and not use JSON, Chinese, or extra explanations.

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

The image shows four circular regions, likely representing cross-sections of apple tissue. The upper left and upper right images appear to show more uniform tissue structures with relatively consistent grayscale intensities. The lower left image shows a more homogeneous circular region, while the lower right image shows a region with a distinct bright central spot surrounded by darker areas.

Key elements to describe:
1. Internal moisture distribution - I should describe how moisture appears in different regions (e.g., uniform vs. uneven)
2. Tissue structure - I should describe the general tissue organization and texture
3. Signal intensity - I should describe the grayscale variations and what they might indicate
4. Patch morphology - I should describe the shape, size, and characteristics of any distinct regions or spots

Prohibited words I should avoid:
- healthy
- diseased
- mild
- severe
- normal
- abnormal
- ground-truth
- label

Now I'll craft a descriptive paragraph that covers these elements without using prohibited words:◁/think▷The composite LF-NMR image of apple #115 reveals distinct patterns of internal moisture distribution across tissue sections. Upper regions display relatively uniform tissue structures with moderate signal intensity variations, suggesting consistent tissue organization. Lower sections exhibit contrasting morphologies: one circular area demonstrates homogeneous tissue characteristics, while another shows a central bright spot surrounded by darker peripheral regions, indicating localized moisture concentration differences. These signal intensity variations correlate spatially with observed tissue density patterns, highlighting moisture heterogeneity within the apple's cross-sectional anatomy.