{
  "ptid_time": "098_S_0172_2006-10-21",
  "img_path": "/data/qiuhui/data/adni/images/098_S_0172/2006-10-21/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 14,835 mm³, 47.1% below the reference mean. With a Z-score of -1.08 (14.0th percentile), this represents mild atrophy; hippocampal volume measures 7,902 mm³, 11.1% above the reference mean. With a Z-score of 1.02 (84.5th percentile), this represents mild enlargement; whole brain volume measures 993,285 mm³, 1.9% above the reference mean. With a Z-score of 0.24 (59.5th percentile), this represents normal volume ; entorhinal cortex volume measures 3,557 mm³, 3.2% below the reference mean. With a Z-score of -0.19 (42.3th percentile), this represents normal volume ; fusiform gyrus volume measures 16,068 mm³, 5.6% below the reference mean. With a Z-score of -0.51 (30.7th percentile), this represents normal volume ; middle temporal gyrus volume measures 19,104 mm³, 0.3% below the reference mean. With a Z-score of -0.03 (48.8th percentile), this represents normal volume . ",
  "text_data": "Age is 71.1 years. Gender is Female. Education: 18 years. MMSE: 29.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "Reasoning: The brain imaging shows mild ventricular atrophy but otherwise normal or slightly enlarged volumes in key regions (hippocampus, whole brain). Cognitive testing (MMSE 29/30) is intact, and there is no APOE4 genetic risk. No significant atrophy in Alzheimer’s-vulnerable regions (entorhinal cortex, fusiform gyrus, middle temporal gyrus).  \nDiagnosis: CN (Cognitively Normal)  \nConfidence: High",
  "timestamp": "2025-07-26T10:38:37.985614"
}