{
  "ptid_time": "052_S_0951_2006-10-19",
  "img_path": "/data/qiuhui/data/adni/images/052_S_0951/2006-10-19/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 89,593 mm³, 90.6% above the reference mean. With a Z-score of 2.63 (99.6th percentile), this represents significant enlargement; hippocampal volume measures 7,714 mm³, 10.7% above the reference mean. With a Z-score of 0.92 (82.2th percentile), this represents normal volume ; whole brain volume measures 1,055,280 mm³, 2.5% above the reference mean. With a Z-score of 0.33 (63.0th percentile), this represents normal volume ; entorhinal cortex volume measures 5,731 mm³, 44.4% above the reference mean. With a Z-score of 2.91 (99.8th percentile), this represents significant enlargement; fusiform gyrus volume measures 19,005 mm³, 5.2% above the reference mean. With a Z-score of 0.45 (67.4th percentile), this represents normal volume ; middle temporal gyrus volume measures 17,714 mm³, 12.2% below the reference mean. With a Z-score of -1.09 (13.7th percentile), this represents mild atrophy. ",
  "text_data": "Age is 84.8 years. Gender is Male. Education: 18 years. Handedness: Right. Race: White. Medical history: Head, Eyes, Ears, Nose and Throat; Cardiovascular; Respiratory; Musculoskeletal; Gastrointestinal; Smoking; Major Surgical Procedures. MMSE: 28.0. Logical Memory: 14.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The ventricular volume is significantly enlarged (Z-score 2.63), suggesting possible atrophy, while the middle temporal gyrus shows mild atrophy (Z-score -1.09). However, hippocampal and whole brain volumes are normal, and the MMSE score of 28 is within the normal range. The absence of APOE4 alleles reduces genetic risk.  \n\n**Diagnosis:** **CN (Cognitively Normal)**  \n**Confidence:** **Medium** (due to mixed findings—ventricular enlargement and mild temporal atrophy but preserved cognition and no APOE4 risk)",
  "timestamp": "2025-07-26T07:40:20.984539"
}