{
  "ptid_time": "027_S_0307_2007-05-01",
  "img_path": "/data/qiuhui/data/adni/images/027_S_0307/2007-05-01/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 29,693 mm³, 22.9% below the reference mean. With a Z-score of -0.55 (29.2th percentile), this represents normal volume ; hippocampal volume measures 7,769 mm³, 2.8% above the reference mean. With a Z-score of 0.27 (60.7th percentile), this represents normal volume ; whole brain volume measures 992,999 mm³, 8.0% below the reference mean. With a Z-score of -1.04 (14.9th percentile), this represents mild atrophy; entorhinal cortex volume measures 3,876 mm³, 5.5% below the reference mean. With a Z-score of -0.37 (35.5th percentile), this represents normal volume ; fusiform gyrus volume measures 15,742 mm³, 16.4% below the reference mean. With a Z-score of -1.40 (8.1th percentile), this represents mild atrophy; middle temporal gyrus volume measures 20,925 mm³, 1.9% below the reference mean. With a Z-score of -0.17 (43.1th percentile), this represents normal volume . ",
  "text_data": "Age is 79.5 years. Gender is Male. Education: 19 years. MMSE: 30.0. Logical Memory: 6.0. APOEε4 alleles: 0.0. Biomarker levels: Amyloid beta: 911.10 pg/mL (normal ); Total tau: 135.90 pg/mL (mild reduced); Phosphorylated tau: 11.65 pg/mL (mild reduced). ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "Reasoning: The brain imaging shows mild atrophy in whole brain and fusiform gyrus volumes, but other regions (hippocampus, entorhinal cortex, middle temporal gyrus) are within normal ranges. Clinically, the patient has a normal MMSE score (30/30), no APOE4 alleles, and normal Aβ levels with mildly reduced tau markers, suggesting no significant Alzheimer's pathology.  \nDiagnosis: CN (Cognitively Normal)  \nConfidence: Medium (due to mild atrophy in some regions but otherwise normal biomarkers and cognitive performance)",
  "timestamp": "2025-07-26T03:33:16.446000"
}