{
  "ptid_time": "137_S_0283_2006-10-30",
  "img_path": "/data/qiuhui/data/adni/images/137_S_0283/2006-10-30/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 19,348 mm³, 49.8% below the reference mean. With a Z-score of -1.19 (11.7th percentile), this represents mild atrophy; hippocampal volume measures 7,336 mm³, 3.0% below the reference mean. With a Z-score of -0.29 (38.7th percentile), this represents normal volume ; whole brain volume measures 1,151,620 mm³, 6.7% above the reference mean. With a Z-score of 0.87 (80.7th percentile), this represents normal volume ; entorhinal cortex volume measures 4,174 mm³, 1.8% above the reference mean. With a Z-score of 0.12 (54.8th percentile), this represents normal volume ; fusiform gyrus volume measures 18,383 mm³, 2.4% below the reference mean. With a Z-score of -0.21 (41.8th percentile), this represents normal volume ; middle temporal gyrus volume measures 21,279 mm³, 0.3% below the reference mean. With a Z-score of -0.03 (49.0th percentile), this represents normal volume . ",
  "text_data": "Age is 78.9 years. Gender is Male. Education: 12 years. MMSE: 29.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume data shows only mild ventricular enlargement (mild atrophy) with all other regions, including the hippocampus, within normal ranges. The MMSE score of 29 is intact, and the absence of APOE4 alleles reduces genetic risk. No significant cognitive or structural deficits are present.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T16:07:37.832813"
}