{
  "ptid_time": "012_S_0634_2007-01-03",
  "img_path": "/data/qiuhui/data/adni/images/012_S_0634/2007-01-03/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 39,178 mm³, 16.7% below the reference mean. With a Z-score of -0.48 (31.4th percentile), this represents normal volume ; hippocampal volume measures 6,170 mm³, 11.5% below the reference mean. With a Z-score of -0.99 (16.1th percentile), this represents normal volume ; whole brain volume measures 1,040,220 mm³, 1.1% above the reference mean. With a Z-score of 0.14 (55.6th percentile), this represents normal volume ; entorhinal cortex volume measures 3,260 mm³, 17.9% below the reference mean. With a Z-score of -1.17 (12.1th percentile), this represents mild atrophy; fusiform gyrus volume measures 20,140 mm³, 11.5% above the reference mean. With a Z-score of 0.99 (84.0th percentile), this represents normal volume ; middle temporal gyrus volume measures 22,667 mm³, 12.4% above the reference mean. With a Z-score of 1.11 (86.6th percentile), this represents mild enlargement. ",
  "text_data": "Age is 82.6 years. Gender is Male. Education: 20 years. MMSE: 26.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "Reasoning: The brain volume measures show mild atrophy in the entorhinal cortex (Z-score -1.17, 12.1th percentile), which is often an early marker of Alzheimer's pathology. However, other regions, including the hippocampus, are within normal ranges. The MMSE score of 26 is borderline but not definitively indicative of dementia, and the absence of APOE4 reduces genetic risk.  \n\nDiagnosis: Mild Cognitive Impairment (MCI)  \nConfidence: Medium (due to isolated entorhinal atrophy and borderline MMSE, but no clear dementia-level deficits)",
  "timestamp": "2025-07-25T23:04:23.512627"
}