{
  "ptid_time": "009_S_4388_2014-01-31",
  "img_path": "/data/qiuhui/data/adni/images/009_S_4388/2014-01-31/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 43,380 mm³, 44.5% above the reference mean. With a Z-score of 1.06 (85.5th percentile), this represents mild enlargement; hippocampal volume measures 8,143 mm³, 1.4% above the reference mean. With a Z-score of 0.14 (55.7th percentile), this represents normal volume ; whole brain volume measures 1,142,120 mm³, 0.7% above the reference mean. With a Z-score of 0.09 (53.8th percentile), this represents normal volume ; entorhinal cortex volume measures 4,350 mm³, 2.0% above the reference mean. With a Z-score of 0.14 (55.6th percentile), this represents normal volume ; fusiform gyrus volume measures 17,825 mm³, 10.5% below the reference mean. With a Z-score of -0.87 (19.2th percentile), this represents normal volume ; middle temporal gyrus volume measures 23,174 mm³, 3.4% above the reference mean. With a Z-score of 0.28 (61.0th percentile), this represents normal volume . ",
  "text_data": "Age is 68.8 years. Gender is Male. Education: 18 years. MMSE: 30.0. MoCA: 30.0. Logical Memory: 17.0. APOEε4 alleles: 2.0. Biomarker levels: Florbetapir (AV45): 0.97 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The brain imaging shows mild ventricular enlargement (44.5% above reference mean, Z-score 1.06), which can be associated with aging or early neurodegenerative changes, but all other brain volumes (hippocampus, whole brain, entorhinal cortex, fusiform gyrus, middle temporal gyrus) are within normal ranges. Cognitive testing (MMSE 30, MoCA 30) is intact, and amyloid PET (AV45) is normal, despite the presence of two APOE4 alleles.  \n\n**Diagnosis:** **Cognitively Normal (CN)**  \n**Confidence:** **High** (No significant atrophy in AD-vulnerable regions, normal cognition, and no amyloid pathology despite genetic risk.)",
  "timestamp": "2025-07-25T22:20:50.318007"
}