{
  "ptid_time": "116_S_4175_2012-02-29",
  "img_path": "/data/qiuhui/data/adni/images/116_S_4175/2012-02-29/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 24,032 mm³, 37.6% below the reference mean. With a Z-score of -0.90 (18.4th percentile), this represents normal volume ; hippocampal volume measures 8,443 mm³, 11.7% above the reference mean. With a Z-score of 1.14 (87.3th percentile), this represents mild enlargement; whole brain volume measures 1,049,930 mm³, 2.7% below the reference mean. With a Z-score of -0.35 (36.2th percentile), this represents normal volume ; entorhinal cortex volume measures 4,270 mm³, 4.1% above the reference mean. With a Z-score of 0.28 (61.0th percentile), this represents normal volume ; fusiform gyrus volume measures 19,196 mm³, 1.9% above the reference mean. With a Z-score of 0.16 (56.4th percentile), this represents normal volume ; middle temporal gyrus volume measures 20,336 mm³, 4.7% below the reference mean. With a Z-score of -0.42 (33.6th percentile), this represents normal volume . ",
  "text_data": "Age is 76.0 years. Gender is Male. Education: 20 years. MMSE: 29.0. MoCA: 25.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measures are largely within normal ranges, with no significant atrophy in key regions like the hippocampus or entorhinal cortex. Cognitive scores (MMSE 29, MoCA 25) are borderline for MCI (MoCA <26 suggests possible MCI), but the absence of structural atrophy makes dementia unlikely. APOE4 carrier status increases Alzheimer's risk but does not confirm pathology.  \n\n**Diagnosis:** **MCI** (mild cognitive impairment, likely non-amnestic given preserved hippocampal volume)  \n**Confidence:** **Medium** (cognitive scores suggest MCI, but structural findings are inconclusive; clinical correlation needed for functional impact).",
  "timestamp": "2025-07-26T12:08:37.261751"
}