{
  "ptid_time": "100_S_1226_2009-03-17",
  "img_path": "/data/qiuhui/data/adni/images/100_S_1226/2009-03-17/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 57,831 mm³, 23.0% above the reference mean. With a Z-score of 0.67 (74.8th percentile), this represents normal volume ; hippocampal volume measures 5,820 mm³, 16.5% below the reference mean. With a Z-score of -1.42 (7.7th percentile), this represents mild atrophy; whole brain volume measures 1,028,420 mm³, 0.1% below the reference mean. With a Z-score of -0.01 (49.6th percentile), this represents normal volume ; entorhinal cortex volume measures 3,635 mm³, 8.4% below the reference mean. With a Z-score of -0.55 (29.1th percentile), this represents normal volume ; fusiform gyrus volume measures 14,871 mm³, 17.7% below the reference mean. With a Z-score of -1.53 (6.3th percentile), this represents moderate atrophy; middle temporal gyrus volume measures 16,794 mm³, 16.7% below the reference mean. With a Z-score of -1.50 (6.7th percentile), this represents moderate atrophy. ",
  "text_data": "Age is 84.6 years. Gender is Male. Education: 16 years. MMSE: 29.0. Logical Memory: 6.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: AD.",
  "gpt_diagnosis": "**Reasoning:** The hippocampal volume shows mild atrophy (Z-score -1.42, 7.7th percentile), while the fusiform gyrus and middle temporal gyrus exhibit moderate atrophy (Z-scores -1.53 and -1.50, respectively). However, the MMSE score is normal (29/30), and there is no APOE4 risk allele. The atrophy in memory-related regions is concerning but not yet clinically significant.  \n\n**Diagnosis:** **MCI (Mild Cognitive Impairment)**  \n**Confidence:** **Medium** (due to structural atrophy without clear cognitive deficits yet)",
  "timestamp": "2025-07-26T11:22:24.234129"
}