{
  "ptid_time": "070_S_4856_2018-04-10",
  "img_path": "/data/qiuhui/data/adni/images/070_S_4856/2018-04-10/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 88,210 mm³, 214.3% above the reference mean. With a Z-score of 4.91 (100.0th percentile), this represents profound enlargement; hippocampal volume measures 7,918 mm³, 11.3% above the reference mean. With a Z-score of 1.04 (85.0th percentile), this represents mild enlargement; whole brain volume measures 989,993 mm³, 1.6% above the reference mean. With a Z-score of 0.20 (57.9th percentile), this represents normal volume ; entorhinal cortex volume measures 4,488 mm³, 22.2% above the reference mean. With a Z-score of 1.36 (91.3th percentile), this represents mild enlargement; fusiform gyrus volume measures 16,857 mm³, 0.9% below the reference mean. With a Z-score of -0.08 (46.7th percentile), this represents normal volume ; middle temporal gyrus volume measures 20,334 mm³, 6.1% above the reference mean. With a Z-score of 0.53 (70.1th percentile), this represents normal volume . ",
  "text_data": "Age is 70.5 years. Gender is Female. Education: 18 years. MMSE: 30.0. MoCA: 30.0. Logical Memory: 21.0. APOEε4 alleles: 0.0. Biomarker levels: Flobetaben (FBB): 0.96 SUVR (mild reduced). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The ventricular volume is profoundly enlarged (Z-score 4.91), which is strongly suggestive of neurodegeneration, but hippocampal, entorhinal cortex, and other key brain volumes are normal or mildly enlarged. Cognitive scores (MMSE 30, MoCA 30) are intact, and there is no APOE4 risk allele.  \n**Diagnosis:** **Cognitively Normal (CN)**  \n**Confidence:** **Medium** (ventricular enlargement is concerning, but preserved cognition and other volumes suggest no current impairment)",
  "timestamp": "2025-07-26T09:05:12.715351"
}