{
  "ptid_time": "018_S_0055_2007-02-27",
  "img_path": "/data/qiuhui/data/adni/images/018_S_0055/2007-02-27/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 74,959 mm³, 94.6% above the reference mean. With a Z-score of 2.27 (98.8th percentile), this represents significant enlargement; whole brain volume measures 1,126,070 mm³, 4.3% above the reference mean. With a Z-score of 0.56 (71.3th percentile), this represents normal volume . ",
  "text_data": "Age is 76.5 years. Gender is Male. Education: 20 years. MMSE: 30.0. Logical Memory: 23.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The ventricular volume is significantly enlarged (94.6% above mean, Z-score 2.27), which is often associated with brain atrophy, while whole brain volume is normal. However, the MMSE score of 30 is intact, and there is no APOE4 risk allele.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (ventricular enlargement suggests possible early neurodegeneration, but cognitive performance remains intact)",
  "timestamp": "2025-07-26T00:42:18.354473"
}