{
  "ptid_time": "036_S_4878_2014-08-04",
  "img_path": "/data/qiuhui/data/adni/images/036_S_4878/2014-08-04/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 22,512 mm³, 19.8% below the reference mean. With a Z-score of -0.45 (32.5th percentile), this represents normal volume ; hippocampal volume measures 7,419 mm³, 4.3% above the reference mean. With a Z-score of 0.39 (65.3th percentile), this represents normal volume ; whole brain volume measures 896,112 mm³, 8.1% below the reference mean. With a Z-score of -1.01 (15.5th percentile), this represents mild atrophy; entorhinal cortex volume measures 3,559 mm³, 3.1% below the reference mean. With a Z-score of -0.19 (42.5th percentile), this represents normal volume ; fusiform gyrus volume measures 19,063 mm³, 12.0% above the reference mean. With a Z-score of 1.10 (86.4th percentile), this represents mild enlargement; middle temporal gyrus volume measures 17,756 mm³, 7.4% below the reference mean. With a Z-score of -0.64 (26.1th percentile), this represents normal volume . ",
  "text_data": "Age is 74.9 years. Gender is Female. Education: 14 years. MMSE: 29.0. MoCA: 27.0. Logical Memory: 18.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 0.99 SUVR (normal ); Total tau: 180.40 pg/mL (normal ); Phosphorylated tau: 15.29 pg/mL (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain imaging shows mild whole-brain atrophy but otherwise normal volumes in key Alzheimer’s-related regions (hippocampus, entorhinal cortex). Cognitive scores (MMSE 29, MoCA 27) are intact, and biomarkers (tau, amyloid) are normal. No APOE4 risk allele is present.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T06:19:13.335918"
}