{
  "ptid_time": "009_S_0862_2008-10-15",
  "img_path": "/data/qiuhui/data/adni/images/009_S_0862/2008-10-15/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 26,171 mm³, 6.8% below the reference mean. With a Z-score of -0.15 (43.9th percentile), this represents normal volume ; hippocampal volume measures 5,426 mm³, 23.7% below the reference mean. With a Z-score of -2.18 (1.5th percentile), this represents significant atrophy; whole brain volume measures 892,825 mm³, 8.4% below the reference mean. With a Z-score of -1.06 (14.5th percentile), this represents mild atrophy; entorhinal cortex volume measures 2,270 mm³, 38.2% below the reference mean. With a Z-score of -2.34 (1.0th percentile), this represents significant atrophy; fusiform gyrus volume measures 14,804 mm³, 13.0% below the reference mean. With a Z-score of -1.18 (11.9th percentile), this represents mild atrophy; middle temporal gyrus volume measures 18,145 mm³, 5.3% below the reference mean. With a Z-score of -0.46 (32.1th percentile), this represents normal volume . ",
  "text_data": "Age is 75.4 years. Gender is Female. Education: 12 years. MMSE: 29.0. Logical Memory: 15.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The hippocampal and entorhinal cortex volumes show significant atrophy (Z-scores of -2.18 and -2.34, respectively), which are strongly associated with Alzheimer's pathology. However, the MMSE score of 29 is within the normal range, suggesting preserved cognitive function despite structural changes.  \n\n**Diagnosis:** **Mild Cognitive Impairment (MCI)** (due to significant atrophy in memory-critical regions but intact global cognition).  \n\n**Confidence:** **Medium** (high confidence in structural findings, but clinical correlation is needed due to the normal MMSE).",
  "timestamp": "2025-07-25T22:13:51.046078"
}