{
  "ptid_time": "003_S_0907_2010-12-13",
  "img_path": "/data/qiuhui/data/adni/images/003_S_0907/2010-12-13/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 41,863 mm³, 0.6% above the reference mean. With a Z-score of 0.10 (54.0th percentile), this represents normal volume ; whole brain volume measures 819,446 mm³, 9.9% below the reference mean. With a Z-score of -1.11 (13.4th percentile), this represents mild atrophy. ",
  "text_data": "Age is 92.6 years. Gender is Female. Education: 20 years. Handedness: Right. Race: White. MoCA: 25.0. Logical Memory: 11.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 0.99 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The patient shows mild whole brain atrophy (Z-score -1.11, 13.4th percentile) but normal ventricular volume. At age 92.6, some atrophy is expected. The MoCA score of 25 is borderline for mild cognitive impairment (MCI), but given the absence of APOE4 and normal AV45 (amyloid PET), neurodegeneration appears age-appropriate.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to borderline MoCA but lack of other pathological markers)",
  "timestamp": "2025-07-25T20:38:20.503227"
}