{
  "ptid_time": "099_S_0551_2007-11-29",
  "img_path": "/data/qiuhui/data/adni/images/099_S_0551/2007-11-29/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 20,737 mm³, 30.9% below the reference mean. With a Z-score of -0.74 (23.1th percentile), this represents normal volume ; hippocampal volume measures 6,746 mm³, 16.0% below the reference mean. With a Z-score of -1.60 (5.5th percentile), this represents moderate atrophy; whole brain volume measures 1,086,370 mm³, 4.2% below the reference mean. With a Z-score of -0.60 (27.4th percentile), this represents normal volume ; entorhinal cortex volume measures 3,833 mm³, 10.1% below the reference mean. With a Z-score of -0.70 (24.3th percentile), this represents normal volume ; fusiform gyrus volume measures 14,979 mm³, 24.8% below the reference mean. With a Z-score of -2.06 (2.0th percentile), this represents significant atrophy; middle temporal gyrus volume measures 18,014 mm³, 19.6% below the reference mean. With a Z-score of -1.62 (5.3th percentile), this represents moderate atrophy. ",
  "text_data": "Age is 65.7 years. Gender is Male. Education: 16 years. MMSE: 29.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The hippocampal volume shows moderate atrophy (Z-score -1.60, 5.5th percentile), and the fusiform gyrus has significant atrophy (Z-score -2.06, 2.0th percentile), which are concerning for early neurodegenerative changes. However, the MMSE score of 29 is within the normal range, and there is no APOE4 risk allele, suggesting preserved cognitive function despite structural changes.  \n\n**Diagnosis:** **Mild Cognitive Impairment (MCI)**  \n**Confidence:** **Medium** (due to structural atrophy but intact cognition on MMSE)",
  "timestamp": "2025-07-26T10:58:39.550502"
}