{
  "ptid_time": "037_S_0539_2007-02-02",
  "img_path": "/data/qiuhui/data/adni/images/037_S_0539/2007-02-02/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 48,747 mm³, 26.6% above the reference mean. With a Z-score of 0.64 (73.8th percentile), this represents normal volume ; hippocampal volume measures 5,852 mm³, 22.6% below the reference mean. With a Z-score of -2.20 (1.4th percentile), this represents significant atrophy; whole brain volume measures 939,611 mm³, 13.0% below the reference mean. With a Z-score of -1.68 (4.6th percentile), this represents moderate atrophy; entorhinal cortex volume measures 2,550 mm³, 37.8% below the reference mean. With a Z-score of -2.56 (0.5th percentile), this represents significant atrophy; fusiform gyrus volume measures 14,390 mm³, 23.6% below the reference mean. With a Z-score of -2.01 (2.2th percentile), this represents significant atrophy; middle temporal gyrus volume measures 17,514 mm³, 17.9% below the reference mean. With a Z-score of -1.61 (5.4th percentile), this represents moderate atrophy. ",
  "text_data": "Age is 73.9 years. Gender is Male. Education: 20 years. MMSE: 25.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "Reasoning: The patient shows significant atrophy in the hippocampus, entorhinal cortex, and fusiform gyrus—key regions affected in Alzheimer's disease. The MMSE score of 25 is borderline, but the structural changes, particularly the hippocampal atrophy (Z-score -2.20), strongly suggest neurodegeneration.  \nDiagnosis: **MCI (likely due to Alzheimer's pathology)**  \nConfidence: **High**",
  "timestamp": "2025-07-26T06:31:23.264999"
}