{
  "ptid_time": "072_S_4063_2013-06-25",
  "img_path": "/data/qiuhui/data/adni/images/072_S_4063/2013-06-25/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 6,916 mm³, 69.0% below the reference mean. With a Z-score of -1.73 (4.2th percentile), this represents moderate atrophy; hippocampal volume measures 7,084 mm³, 7.8% below the reference mean. With a Z-score of -0.88 (19.0th percentile), this represents normal volume ; whole brain volume measures 915,165 mm³, 11.1% below the reference mean. With a Z-score of -1.38 (8.4th percentile), this represents mild atrophy; entorhinal cortex volume measures 3,106 mm³, 20.2% below the reference mean. With a Z-score of -1.57 (5.9th percentile), this represents moderate atrophy; fusiform gyrus volume measures 15,954 mm³, 12.4% below the reference mean. With a Z-score of -1.40 (8.1th percentile), this represents mild atrophy; middle temporal gyrus volume measures 16,443 mm³, 19.9% below the reference mean. With a Z-score of -1.77 (3.9th percentile), this represents moderate atrophy. ",
  "text_data": "Age is 61.2 years. Gender is Female. Education: 13 years. MMSE: 30.0. MoCA: 29.0. Logical Memory: 18.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.03 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The imaging data show moderate atrophy in the ventricular volume, entorhinal cortex, and middle temporal gyrus, along with mild atrophy in the whole brain and fusiform gyrus, while hippocampal volume remains normal. Despite these structural changes, cognitive testing (MMSE 30, MoCA 29) is intact, and amyloid PET (AV45) is normal.  \n\n**Diagnosis:** **Cognitively Normal (CN)**  \n**Confidence:** **Medium** (Atrophy patterns are concerning, but preserved cognition and normal amyloid reduce likelihood of MCI/dementia at this stage.)",
  "timestamp": "2025-07-26T09:16:34.173753"
}