{
  "ptid_time": "114_S_0601_2006-06-05",
  "img_path": "/data/qiuhui/data/adni/images/114_S_0601/2006-06-05/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 74,719 mm³, 166.2% above the reference mean. With a Z-score of 3.81 (100.0th percentile), this represents profound enlargement; hippocampal volume measures 6,185 mm³, 13.1% below the reference mean. With a Z-score of -1.20 (11.5th percentile), this represents mild atrophy; whole brain volume measures 937,947 mm³, 3.8% below the reference mean. With a Z-score of -0.47 (31.8th percentile), this represents normal volume ; entorhinal cortex volume measures 4,183 mm³, 13.9% above the reference mean. With a Z-score of 0.85 (80.3th percentile), this represents normal volume ; fusiform gyrus volume measures 15,612 mm³, 8.2% below the reference mean. With a Z-score of -0.75 (22.7th percentile), this represents normal volume ; middle temporal gyrus volume measures 18,910 mm³, 1.4% below the reference mean. With a Z-score of -0.12 (45.3th percentile), this represents normal volume . ",
  "text_data": "Age is 76.6 years. Gender is Female. Education: 16 years. Handedness: Right. Race: White. Medical history: Head, Eyes, Ears, Nose and Throat; Cardiovascular; Musculoskeletal; Allergies or Drug Sensitivities; Major Surgical Procedures. MMSE: 30.0. Logical Memory: 16.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The data shows profound ventricular enlargement (Z-score 3.81) and mild hippocampal atrophy (Z-score -1.20), which are concerning for neurodegenerative changes. However, the MMSE score of 30 is intact, and other brain regions (whole brain, entorhinal cortex, fusiform gyrus, middle temporal gyrus) are within normal ranges, suggesting no significant cognitive impairment at this time.  \n\n**Diagnosis:** **CN (Cognitively Normal)**  \n**Confidence:** **Medium** (due to conflicting imaging findings—ventricular enlargement and mild hippocampal atrophy—despite normal cognition and no APOE4 risk)",
  "timestamp": "2025-07-26T11:42:25.552667"
}