{
  "ptid_time": "129_S_4396_2017-12-15",
  "img_path": "/data/qiuhui/data/adni/images/129_S_4396/2017-12-15/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 28,653 mm³, 22.5% below the reference mean. With a Z-score of -0.61 (27.2th percentile), this represents normal volume ; hippocampal volume measures 6,390 mm³, 1.6% below the reference mean. With a Z-score of -0.13 (44.9th percentile), this represents normal volume ; whole brain volume measures 848,453 mm³, 8.6% below the reference mean. With a Z-score of -1.03 (15.1th percentile), this represents mild atrophy; entorhinal cortex volume measures 3,449 mm³, 0.4% below the reference mean. With a Z-score of -0.02 (49.2th percentile), this represents normal volume ; fusiform gyrus volume measures 14,542 mm³, 9.7% below the reference mean. With a Z-score of -0.73 (23.2th percentile), this represents normal volume ; middle temporal gyrus volume measures 18,148 mm³, 0.7% above the reference mean. With a Z-score of 0.06 (52.3th percentile), this represents normal volume . ",
  "text_data": "Age is 84.4 years. Gender is Female. Education: 12 years. MMSE: 30.0. MoCA: 28.0. Logical Memory: 16.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.13 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume data shows mild whole-brain atrophy (Z-score -1.03, 15.1th percentile), but all other regions (hippocampus, entorhinal cortex, fusiform gyrus, etc.) are within normal ranges. Cognitive testing (MMSE 30, MoCA 28) is intact, and amyloid PET (AV45) is normal, with no APOE4 risk allele.  \n\n**Diagnosis:** **CN (Cognitively Normal)**  \n**Confidence:** **High**  \n\n(No significant structural or biomarker evidence of neurodegeneration or cognitive impairment.)",
  "timestamp": "2025-07-26T14:17:03.616652"
}