{
  "ptid_time": "016_S_4952_2015-12-02",
  "img_path": "/data/qiuhui/data/adni/images/016_S_4952/2015-12-02/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 14,465 mm³, 48.5% below the reference mean. With a Z-score of -1.11 (13.4th percentile), this represents mild atrophy; hippocampal volume measures 7,676 mm³, 7.9% above the reference mean. With a Z-score of 0.72 (76.5th percentile), this represents normal volume ; whole brain volume measures 914,180 mm³, 6.2% below the reference mean. With a Z-score of -0.78 (21.7th percentile), this represents normal volume ; entorhinal cortex volume measures 3,837 mm³, 4.5% above the reference mean. With a Z-score of 0.27 (60.8th percentile), this represents normal volume ; fusiform gyrus volume measures 16,155 mm³, 5.0% below the reference mean. With a Z-score of -0.46 (32.3th percentile), this represents normal volume ; middle temporal gyrus volume measures 19,719 mm³, 2.9% above the reference mean. With a Z-score of 0.25 (59.8th percentile), this represents normal volume . ",
  "text_data": "Age is 72.3 years. Gender is Female. Education: 12 years. MMSE: 30.0. MoCA: 26.0. Logical Memory: 14.0. APOEε4 alleles: 1.0. Biomarker levels: Florbetapir (AV45): 1.01 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain imaging shows mild ventricular enlargement (mild atrophy) but otherwise normal volumes in key regions like the hippocampus, entorhinal cortex, and temporal lobes. Cognitive scores are strong (MMSE 30, MoCA 26), and amyloid PET (AV45) is normal, making Alzheimer's pathology unlikely.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T00:36:40.654686"
}