{
  "ptid_time": "041_S_0262_2006-03-17",
  "img_path": "/data/qiuhui/data/adni/images/041_S_0262/2006-03-17/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 25,868 mm³, 45.0% below the reference mean. With a Z-score of -1.31 (9.6th percentile), this represents mild atrophy; hippocampal volume measures 7,975 mm³, 14.4% above the reference mean. With a Z-score of 1.25 (89.4th percentile), this represents mild enlargement; whole brain volume measures 965,385 mm³, 6.2% below the reference mean. With a Z-score of -0.81 (20.8th percentile), this represents normal volume ; entorhinal cortex volume measures 3,588 mm³, 9.6% below the reference mean. With a Z-score of -0.63 (26.5th percentile), this represents normal volume ; fusiform gyrus volume measures 17,951 mm³, 0.6% below the reference mean. With a Z-score of -0.06 (47.8th percentile), this represents normal volume ; middle temporal gyrus volume measures 23,021 mm³, 14.1% above the reference mean. With a Z-score of 1.27 (89.7th percentile), this represents mild enlargement. ",
  "text_data": "Age is 85.8 years. Gender is Male. Education: 14 years. Handedness: Right. Race: White. Medical history: Head, Eyes, Ears, Nose and Throat; Cardiovascular; Respiratory; Musculoskeletal; Major Surgical Procedures. MMSE: 29.0. Logical Memory: 10.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "Reasoning: The brain imaging shows mild ventricular atrophy but otherwise normal or even slightly enlarged volumes in key regions (hippocampus, middle temporal gyrus). The MMSE score of 29 is within the normal range, and the absence of APOE4 alleles reduces genetic risk.  \nDiagnosis: CN (Cognitively Normal)  \nConfidence: Medium (due to mild ventricular atrophy, but other markers and cognitive performance support normal cognition)",
  "timestamp": "2025-07-26T06:56:16.805394"
}