{
  "ptid_time": "021_S_0141_2009-02-24",
  "img_path": "/data/qiuhui/data/adni/images/021_S_0141/2009-02-24/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 25,624 mm³, 45.5% below the reference mean. With a Z-score of -1.32 (9.3th percentile), this represents mild atrophy; hippocampal volume measures 6,029 mm³, 13.5% below the reference mean. With a Z-score of -1.16 (12.2th percentile), this represents mild atrophy; whole brain volume measures 1,058,820 mm³, 2.9% above the reference mean. With a Z-score of 0.38 (64.7th percentile), this represents normal volume ; entorhinal cortex volume measures 3,242 mm³, 18.3% below the reference mean. With a Z-score of -1.20 (11.5th percentile), this represents mild atrophy; fusiform gyrus volume measures 18,330 mm³, 1.5% above the reference mean. With a Z-score of 0.13 (55.0th percentile), this represents normal volume ; middle temporal gyrus volume measures 18,231 mm³, 9.6% below the reference mean. With a Z-score of -0.86 (19.4th percentile), this represents normal volume . ",
  "text_data": "Age is 84.1 years. Gender is Male. Education: 12 years. MMSE: 24.0. Logical Memory: 0.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: AD.",
  "gpt_diagnosis": "**Reasoning:** The imaging data shows mild atrophy in key Alzheimer's-related regions (hippocampus, entorhinal cortex, and ventricular enlargement), while whole brain and fusiform gyrus volumes remain normal. The MMSE score of 24 is borderline for mild cognitive impairment (MCI), and the presence of one APOE4 allele increases Alzheimer's risk.  \n\n**Diagnosis:** **Mild Cognitive Impairment (MCI)**  \n**Confidence:** **Medium** (Clinical correlation with neuropsychological testing would strengthen confidence.)",
  "timestamp": "2025-07-26T01:20:38.823093"
}