{
  "ptid_time": "032_S_5289_2018-05-14",
  "img_path": "/data/qiuhui/data/adni/images/032_S_5289/2018-05-14/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 43,511 mm³, 94.8% above the reference mean. With a Z-score of 2.37 (99.1th percentile), this represents significant enlargement; hippocampal volume measures 7,790 mm³, 1.4% above the reference mean. With a Z-score of 0.15 (56.1th percentile), this represents normal volume ; whole brain volume measures 1,043,990 mm³, 1.4% above the reference mean. With a Z-score of 0.18 (57.1th percentile), this represents normal volume ; entorhinal cortex volume measures 4,207 mm³, 8.1% above the reference mean. With a Z-score of 0.63 (73.4th percentile), this represents normal volume ; fusiform gyrus volume measures 17,725 mm³, 2.7% below the reference mean. With a Z-score of -0.30 (38.2th percentile), this represents normal volume ; middle temporal gyrus volume measures 24,436 mm³, 19.1% above the reference mean. With a Z-score of 1.70 (95.5th percentile), this represents moderate enlargement. ",
  "text_data": "Age is 64.2 years. Gender is Female. Education: 16 years. MMSE: 30.0. MoCA: 30.0. Logical Memory: 15.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The data shows significant ventricular enlargement (Z-score 2.37, 99.1th percentile), which is often associated with brain atrophy, but hippocampal and whole brain volumes are within normal ranges. Cognitive scores (MMSE 30, MoCA 30) are intact, and APOE4 status (heterozygous) suggests genetic risk but no current impairment.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (ventricular enlargement is notable, but cognitive performance is preserved)",
  "timestamp": "2025-07-26T05:07:55.743481"
}