{
  "ptid_time": "011_S_6714_2019-04-12",
  "img_path": "/data/qiuhui/data/adni/images/011_S_6714/2019-04-12/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 10,784 mm³, 51.7% below the reference mean. With a Z-score of -1.29 (9.8th percentile), this represents mild atrophy; hippocampal volume measures 9,035 mm³, 17.6% above the reference mean. With a Z-score of 1.97 (97.6th percentile), this represents moderate enlargement; whole brain volume measures 1,073,890 mm³, 4.3% above the reference mean. With a Z-score of 0.54 (70.6th percentile), this represents normal volume ; entorhinal cortex volume measures 4,029 mm³, 3.5% above the reference mean. With a Z-score of 0.27 (60.7th percentile), this represents normal volume ; fusiform gyrus volume measures 19,745 mm³, 8.4% above the reference mean. With a Z-score of 0.95 (82.9th percentile), this represents normal volume ; middle temporal gyrus volume measures 26,047 mm³, 26.9% above the reference mean. With a Z-score of 2.39 (99.2th percentile), this represents significant enlargement. ",
  "text_data": "Age is 63.3 years. Gender is Female. Education: 12 years. Handedness: Right. Race: Black or African American. MMSE: 30.0. MoCA: 24.0. Logical Memory: 11.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.14 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The imaging shows mild ventricular atrophy (Z-score -1.29) but otherwise normal or even enlarged volumes in key regions (hippocampus, entorhinal cortex, fusiform gyrus, middle temporal gyrus). Cognitive scores are mixed (MMSE 30 normal, MoCA 24 borderline), but there is no significant atrophy in Alzheimer’s-vulnerable regions and no APOE4 or amyloid (AV45 normal).  \n\n**Diagnosis:** **CN (Cognitively Normal)**  \n**Confidence:** **Medium** (MoCA is slightly low, but structural and biomarker data do not support neurodegeneration).",
  "timestamp": "2025-07-25T23:04:10.475598"
}