{
  "ptid_time": "098_S_0172_2006-02-26",
  "img_path": "/data/qiuhui/data/adni/images/098_S_0172/2006-02-26/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 14,350 mm³, 48.9% below the reference mean. With a Z-score of -1.12 (13.2th percentile), this represents mild atrophy; hippocampal volume measures 7,848 mm³, 10.3% above the reference mean. With a Z-score of 0.95 (82.8th percentile), this represents normal volume ; whole brain volume measures 996,061 mm³, 2.2% above the reference mean. With a Z-score of 0.28 (60.9th percentile), this represents normal volume ; entorhinal cortex volume measures 3,926 mm³, 6.9% above the reference mean. With a Z-score of 0.42 (66.4th percentile), this represents normal volume ; fusiform gyrus volume measures 16,258 mm³, 4.4% below the reference mean. With a Z-score of -0.40 (34.3th percentile), this represents normal volume ; middle temporal gyrus volume measures 19,328 mm³, 0.8% above the reference mean. With a Z-score of 0.07 (52.9th percentile), this represents normal volume . ",
  "text_data": "Age is 70.6 years. Gender is Female. Education: 18 years. Handedness: Right. Race: White. Medical history: Head, Eyes, Ears, Nose and Throat; Cardiovascular; Dermatologic-Connective Tissue; Musculoskeletal; Allergies or Drug Sensitivities; Malignancy; Major Surgical Procedures. MMSE: 29.0. Logical Memory: 11.0. APOEε4 alleles: 0.0. Biomarker levels: Total tau: 226.50 pg/mL (normal ); Phosphorylated tau: 21.19 pg/mL (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume data shows mild ventricular atrophy but otherwise normal volumes in key regions (hippocampus, entorhinal cortex, fusiform gyrus, middle temporal gyrus). The MMSE score of 29 is within the normal range, and biomarkers (T-tau, P-tau) are normal. APOE4-negative status further reduces Alzheimer's risk.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T10:38:31.767638"
}