{
  "ptid_time": "022_S_0004_2007-05-25",
  "img_path": "/data/qiuhui/data/adni/images/022_S_0004/2007-05-25/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 40,768 mm³, 35.8% above the reference mean. With a Z-score of 0.85 (80.2th percentile), this represents normal volume ; hippocampal volume measures 6,373 mm³, 20.6% below the reference mean. With a Z-score of -2.06 (2.0th percentile), this represents significant atrophy; whole brain volume measures 1,095,210 mm³, 3.5% below the reference mean. With a Z-score of -0.49 (31.2th percentile), this represents normal volume ; entorhinal cortex volume measures 3,764 mm³, 11.7% below the reference mean. With a Z-score of -0.81 (20.9th percentile), this represents normal volume ; fusiform gyrus volume measures 17,862 mm³, 10.3% below the reference mean. With a Z-score of -0.85 (19.6th percentile), this represents normal volume ; middle temporal gyrus volume measures 18,754 mm³, 16.3% below the reference mean. With a Z-score of -1.34 (8.9th percentile), this represents mild atrophy. ",
  "text_data": "Age is 69.0 years. Gender is Male. Education: 10 years. MMSE: 27.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "Reasoning: The hippocampal volume shows significant atrophy (Z-score -2.06, 2nd percentile), which is a strong biomarker for Alzheimer's pathology. The MMSE score of 27 is within the normal range, but the hippocampal atrophy suggests early neurodegeneration. Other brain regions show normal or only mild atrophy, supporting a prodromal stage.  \nDiagnosis: **MCI** (Mild Cognitive Impairment)  \nConfidence: **Medium** (due to normal MMSE but significant hippocampal atrophy)",
  "timestamp": "2025-07-26T01:57:37.584121"
}