{
  "ptid_time": "168_S_6285_2018-04-17",
  "img_path": "/data/qiuhui/data/adni/images/168_S_6285/2018-04-17/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 11,400 mm³, 49.0% below the reference mean. With a Z-score of -1.23 (11.0th percentile), this represents mild atrophy; hippocampal volume measures 7,510 mm³, 2.3% below the reference mean. With a Z-score of -0.26 (39.9th percentile), this represents normal volume ; whole brain volume measures 1,055,190 mm³, 2.5% above the reference mean. With a Z-score of 0.31 (62.4th percentile), this represents normal volume ; entorhinal cortex volume measures 3,799 mm³, 2.4% below the reference mean. With a Z-score of -0.19 (42.6th percentile), this represents normal volume ; fusiform gyrus volume measures 19,593 mm³, 7.6% above the reference mean. With a Z-score of 0.86 (80.4th percentile), this represents normal volume ; middle temporal gyrus volume measures 15,457 mm³, 24.7% below the reference mean. With a Z-score of -2.19 (1.4th percentile), this represents significant atrophy. ",
  "text_data": "Age is 66.6 years. Gender is Female. Education: 16 years. Handedness: Right. Race: White. MMSE: 27.0. MoCA: 24.0. Logical Memory: 16.0. Biomarker levels: Florbetapir (AV45): 1.14 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The data shows significant atrophy in the middle temporal gyrus (Z-score -2.19, 1.4th percentile) and mild ventricular enlargement (Z-score -1.23), while hippocampal and other regional volumes are within normal ranges. Cognitive scores (MMSE 27, MoCA 24) are borderline, with MoCA slightly below the typical cutoff for normal cognition (≥26). The normal AV45 scan suggests no significant amyloid burden.  \n\n**Diagnosis:** **Mild Cognitive Impairment (MCI)**  \n**Confidence:** **Medium** (due to isolated temporal atrophy and borderline cognitive scores, but lack of clear dementia-level impairment or amyloid pathology).",
  "timestamp": "2025-07-26T17:19:22.164547"
}