{
  "ptid_time": "029_S_4384_2018-04-25",
  "img_path": "/data/qiuhui/data/adni/images/029_S_4384/2018-04-25/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 50,860 mm³, 69.4% above the reference mean. With a Z-score of 1.65 (95.0th percentile), this represents moderate enlargement; hippocampal volume measures 7,852 mm³, 2.2% below the reference mean. With a Z-score of -0.22 (41.4th percentile), this represents normal volume ; whole brain volume measures 1,079,300 mm³, 4.9% below the reference mean. With a Z-score of -0.69 (24.5th percentile), this represents normal volume ; entorhinal cortex volume measures 4,332 mm³, 1.6% above the reference mean. With a Z-score of 0.11 (54.5th percentile), this represents normal volume ; fusiform gyrus volume measures 18,860 mm³, 5.3% below the reference mean. With a Z-score of -0.44 (33.1th percentile), this represents normal volume ; middle temporal gyrus volume measures 21,250 mm³, 5.2% below the reference mean. With a Z-score of -0.43 (33.5th percentile), this represents normal volume . ",
  "text_data": "Age is 68.3 years. Gender is Male. Education: 18 years. MMSE: 30.0. MoCA: 30.0. Logical Memory: 19.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.05 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The ventricular volume shows moderate enlargement (69.4% above reference mean, Z-score 1.65), which can be associated with brain atrophy, but all other brain regions (hippocampus, entorhinal cortex, fusiform gyrus, middle temporal gyrus) are within normal ranges. Cognitive scores (MMSE 30, MoCA 30) are intact, and amyloid PET (AV45) is normal, with no APOE4 risk alleles.  \n\n**Diagnosis:** **CN (Cognitively Normal)**  \n**Confidence:** **High** (No significant structural or biomarker evidence of neurodegeneration or cognitive impairment.)",
  "timestamp": "2025-07-26T04:29:14.752180"
}