{
  "ptid_time": "098_S_0171_2006-02-04",
  "img_path": "/data/qiuhui/data/adni/images/098_S_0171/2006-02-04/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 59,655 mm³, 112.5% above the reference mean. With a Z-score of 2.58 (99.5th percentile), this represents significant enlargement; hippocampal volume measures 6,760 mm³, 5.0% below the reference mean. With a Z-score of -0.46 (32.4th percentile), this represents normal volume ; whole brain volume measures 894,357 mm³, 8.2% below the reference mean. With a Z-score of -1.04 (15.0th percentile), this represents mild atrophy; entorhinal cortex volume measures 4,002 mm³, 9.0% above the reference mean. With a Z-score of 0.55 (70.9th percentile), this represents normal volume ; fusiform gyrus volume measures 15,402 mm³, 9.5% below the reference mean. With a Z-score of -0.86 (19.4th percentile), this represents normal volume ; middle temporal gyrus volume measures 17,300 mm³, 9.8% below the reference mean. With a Z-score of -0.85 (19.9th percentile), this represents normal volume . ",
  "text_data": "Age is 78.3 years. Gender is Female. Education: 17 years. Handedness: Right. Race: White. Medical history: Psychiatric; Head, Eyes, Ears, Nose and Throat; Cardiovascular; Musculoskeletal; Gastrointestinal; Allergies or Drug Sensitivities; Major Surgical Procedures. MMSE: 30.0. Logical Memory: 9.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The data shows significant ventricular enlargement (suggesting possible atrophy) and mild whole-brain atrophy, but hippocampal and other regional volumes are within normal ranges. The MMSE score of 30 is intact, and there is no APOE4 risk allele.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to conflicting atrophy patterns but intact cognition and no genetic risk)",
  "timestamp": "2025-07-26T10:37:25.843425"
}