{
  "ptid_time": "041_S_6192_2018-01-31",
  "img_path": "/data/qiuhui/data/adni/images/041_S_6192/2018-01-31/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 52,178 mm³, 41.2% above the reference mean. With a Z-score of 1.11 (86.7th percentile), this represents mild enlargement; hippocampal volume measures 6,261 mm³, 3.6% below the reference mean. With a Z-score of -0.29 (38.6th percentile), this represents normal volume ; whole brain volume measures 887,711 mm³, 4.4% below the reference mean. With a Z-score of -0.52 (30.0th percentile), this represents normal volume ; entorhinal cortex volume measures 3,723 mm³, 7.5% above the reference mean. With a Z-score of 0.41 (65.8th percentile), this represents normal volume ; fusiform gyrus volume measures 15,199 mm³, 5.7% below the reference mean. With a Z-score of -0.42 (33.5th percentile), this represents normal volume ; middle temporal gyrus volume measures 17,042 mm³, 5.5% below the reference mean. With a Z-score of -0.49 (31.3th percentile), this represents normal volume . ",
  "text_data": "Age is 83.3 years. Gender is Female. Education: 18 years. Handedness: Right. Race: White. MMSE: 30.0. MoCA: 25.0. Logical Memory: 18.0. APOEε4 alleles: 0.0. Biomarker levels: Flobetaben (FBB): 1.08 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The ventricular volume is mildly enlarged (41.2% above mean, Z-score 1.11), but hippocampal and whole brain volumes are within normal ranges (Z-scores -0.29 and -0.52, respectively). Cognitive scores (MMSE 30, MoCA 25) are borderline for MCI (MoCA <26 suggests possible impairment), but no significant atrophy in key AD-related regions (hippocampus, entorhinal cortex) is present. APOE4-negative status further reduces AD risk.  \n\n**Diagnosis:** **Mild Cognitive Impairment (MCI)**  \n**Confidence:** **Medium** (MoCA suggests possible impairment, but structural changes are mild and inconsistent with typical AD progression).",
  "timestamp": "2025-07-26T07:29:05.008459"
}