{
  "ptid_time": "041_S_5100_2018-08-08",
  "img_path": "/data/qiuhui/data/adni/images/041_S_5100/2018-08-08/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 72,633 mm³, 88.6% above the reference mean. With a Z-score of 2.12 (98.3th percentile), this represents significant enlargement; hippocampal volume measures 8,210 mm³, 8.6% above the reference mean. With a Z-score of 0.84 (80.0th percentile), this represents normal volume ; whole brain volume measures 1,171,610 mm³, 8.5% above the reference mean. With a Z-score of 1.11 (86.6th percentile), this represents mild enlargement; entorhinal cortex volume measures 4,226 mm³, 3.1% above the reference mean. With a Z-score of 0.21 (58.2th percentile), this represents normal volume ; fusiform gyrus volume measures 19,157 mm³, 1.7% above the reference mean. With a Z-score of 0.14 (55.7th percentile), this represents normal volume ; middle temporal gyrus volume measures 19,466 mm³, 8.8% below the reference mean. With a Z-score of -0.79 (21.5th percentile), this represents normal volume . ",
  "text_data": "Age is 76.7 years. Gender is Male. Education: 16 years. MMSE: 28.0. MoCA: 29.0. Logical Memory: 13.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The ventricular volume is significantly enlarged (Z-score 2.12), which is often seen in neurodegenerative conditions like Alzheimer's disease, but hippocampal, entorhinal cortex, and fusiform gyrus volumes are within normal ranges. Cognitive scores (MMSE 28, MoCA 29) are intact, and there is no APOE4 risk allele.  \n\n**Diagnosis:** **Cognitively Normal (CN)**  \n**Confidence:** **Medium** (ventricular enlargement raises some concern, but preserved cognitive function and normal key AD-related volumes suggest no current impairment)",
  "timestamp": "2025-07-26T07:26:30.910246"
}