{
  "ptid_time": "137_S_0283_2006-03-15",
  "img_path": "/data/qiuhui/data/adni/images/137_S_0283/2006-03-15/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 19,606 mm³, 49.1% below the reference mean. With a Z-score of -1.18 (12.0th percentile), this represents mild atrophy; hippocampal volume measures 7,064 mm³, 6.6% below the reference mean. With a Z-score of -0.64 (26.1th percentile), this represents normal volume ; whole brain volume measures 1,112,520 mm³, 3.1% above the reference mean. With a Z-score of 0.40 (65.5th percentile), this represents normal volume ; entorhinal cortex volume measures 3,516 mm³, 14.3% below the reference mean. With a Z-score of -0.97 (16.7th percentile), this represents normal volume ; fusiform gyrus volume measures 17,578 mm³, 6.7% below the reference mean. With a Z-score of -0.57 (28.4th percentile), this represents normal volume ; middle temporal gyrus volume measures 19,885 mm³, 6.8% below the reference mean. With a Z-score of -0.61 (27.0th percentile), this represents normal volume . ",
  "text_data": "Age is 78.4 years. Gender is Male. Education: 12 years. Handedness: Right. Race: White. Medical history: Cardiovascular. MMSE: 28.0. Logical Memory: 8.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The patient shows mild ventricular enlargement (suggesting mild atrophy) but otherwise normal brain volumes, including the hippocampus, which is a key region for Alzheimer's. The MMSE score of 28 is within the normal range, and there is no APOE4 genetic risk factor.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (mild ventricular atrophy could be age-related, but no significant cognitive or structural deficits suggest dementia or MCI)",
  "timestamp": "2025-07-26T16:07:31.439054"
}