{
  "ptid_time": "941_S_1194_2007-08-22",
  "img_path": "/data/qiuhui/data/adni/images/941_S_1194/2007-08-22/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 51,126 mm³, 8.7% above the reference mean. With a Z-score of 0.25 (60.0th percentile), this represents normal volume ; hippocampal volume measures 5,779 mm³, 17.1% below the reference mean. With a Z-score of -1.47 (7.0th percentile), this represents mild atrophy; whole brain volume measures 958,423 mm³, 6.9% below the reference mean. With a Z-score of -0.90 (18.4th percentile), this represents normal volume ; entorhinal cortex volume measures 4,028 mm³, 1.5% above the reference mean. With a Z-score of 0.10 (53.9th percentile), this represents normal volume ; fusiform gyrus volume measures 16,301 mm³, 9.8% below the reference mean. With a Z-score of -0.85 (19.9th percentile), this represents normal volume ; middle temporal gyrus volume measures 16,139 mm³, 20.0% below the reference mean. With a Z-score of -1.79 (3.7th percentile), this represents moderate atrophy. ",
  "text_data": "Age is 85.3 years. Gender is Male. Education: 18 years. MMSE: 29.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The hippocampal volume shows mild atrophy (Z-score -1.47, 7th percentile), and the middle temporal gyrus shows moderate atrophy (Z-score -1.79, 3.7th percentile), which are concerning for early neurodegenerative changes. However, the MMSE score of 29 is within the normal range, and there is no significant cognitive impairment reported. The absence of APOE4 also reduces Alzheimer's risk.  \n\n**Diagnosis:** **Mild Cognitive Impairment (MCI)**  \n**Confidence:** **Medium**  \n\n*(The structural atrophy suggests early neurodegeneration, but the preserved cognitive function makes dementia unlikely. MCI is the most fitting diagnosis, though confidence is medium due to the high MMSE score.)*",
  "timestamp": "2025-07-26T17:25:33.108923"
}