{
  "ptid_time": "027_S_0120_2009-02-25",
  "img_path": "/data/qiuhui/data/adni/images/027_S_0120/2009-02-25/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 20,375 mm³, 47.1% below the reference mean. With a Z-score of -1.13 (13.0th percentile), this represents mild atrophy; hippocampal volume measures 7,360 mm³, 2.6% below the reference mean. With a Z-score of -0.26 (39.9th percentile), this represents normal volume ; whole brain volume measures 1,108,600 mm³, 2.7% above the reference mean. With a Z-score of 0.35 (63.7th percentile), this represents normal volume ; entorhinal cortex volume measures 4,051 mm³, 1.2% below the reference mean. With a Z-score of -0.08 (46.7th percentile), this represents normal volume ; fusiform gyrus volume measures 19,080 mm³, 1.3% above the reference mean. With a Z-score of 0.11 (54.3th percentile), this represents normal volume ; middle temporal gyrus volume measures 22,051 mm³, 3.3% above the reference mean. With a Z-score of 0.30 (61.8th percentile), this represents normal volume . ",
  "text_data": "Age is 75.0 years. Gender is Male. Education: 20 years. MMSE: 29.0. Logical Memory: 14.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "Reasoning: The brain imaging shows mild ventricular atrophy but otherwise normal volumes in key regions (hippocampus, entorhinal cortex, fusiform gyrus, middle temporal gyrus). The MMSE score of 29 is within the normal range, and while the presence of one APOE4 allele increases Alzheimer's risk, there are no significant structural or cognitive deficits.  \nDiagnosis: CN (Cognitively Normal)  \nConfidence: Medium (due to mild ventricular atrophy, but no other concerning findings)",
  "timestamp": "2025-07-26T03:30:04.108766"
}