{
  "ptid_time": "141_S_6253_2018-03-18",
  "img_path": "/data/qiuhui/data/adni/images/141_S_6253/2018-03-18/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 53,764 mm³, 140.7% above the reference mean. With a Z-score of 3.52 (100.0th percentile), this represents profound enlargement; hippocampal volume measures 8,244 mm³, 7.3% above the reference mean. With a Z-score of 0.82 (79.3th percentile), this represents normal volume ; whole brain volume measures 1,149,940 mm³, 11.7% above the reference mean. With a Z-score of 1.46 (92.8th percentile), this represents mild enlargement; entorhinal cortex volume measures 4,294 mm³, 10.3% above the reference mean. With a Z-score of 0.80 (78.8th percentile), this represents normal volume ; fusiform gyrus volume measures 19,613 mm³, 7.7% above the reference mean. With a Z-score of 0.87 (80.7th percentile), this represents normal volume ; middle temporal gyrus volume measures 22,972 mm³, 12.0% above the reference mean. With a Z-score of 1.06 (85.6th percentile), this represents mild enlargement. ",
  "text_data": "Age is 66.4 years. Gender is Female. Education: 18 years. Handedness: Right. Race: White. MMSE: 30.0. MoCA: 21.0. Logical Memory: 9.0. APOEε4 alleles: 0.0. Biomarker levels: Flobetaben (FBB): 1.01 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The data shows profound ventricular enlargement (Z-score 3.52), which is often associated with neurodegeneration, but hippocampal and entorhinal cortex volumes are normal. The MMSE is normal (30/30), but the MoCA (21/30) suggests mild cognitive impairment. The absence of APOE4 reduces genetic risk.  \n**Diagnosis:** **MCI** (due to MoCA score and ventricular enlargement, but preserved memory-related structures).  \n**Confidence:** **Medium** (ventricular enlargement is concerning, but other structures are intact, and MMSE is normal).",
  "timestamp": "2025-07-26T17:08:09.930440"
}