{
  "ptid_time": "014_S_4401_2017-09-21",
  "img_path": "/data/qiuhui/data/adni/images/014_S_4401/2017-09-21/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 25,811 mm³, 8.0% below the reference mean. With a Z-score of -0.18 (42.7th percentile), this represents normal volume ; hippocampal volume measures 7,734 mm³, 8.7% above the reference mean. With a Z-score of 0.80 (78.8th percentile), this represents normal volume ; whole brain volume measures 1,074,640 mm³, 10.3% above the reference mean. With a Z-score of 1.29 (90.2th percentile), this represents mild enlargement; entorhinal cortex volume measures 4,481 mm³, 22.0% above the reference mean. With a Z-score of 1.35 (91.2th percentile), this represents mild enlargement; fusiform gyrus volume measures 18,848 mm³, 10.8% above the reference mean. With a Z-score of 0.98 (83.7th percentile), this represents normal volume ; middle temporal gyrus volume measures 25,542 mm³, 33.2% above the reference mean. With a Z-score of 2.89 (99.8th percentile), this represents significant enlargement. ",
  "text_data": "Age is 73.0 years. Gender is Female. Education: 20 years. MMSE: 30.0. MoCA: 29.0. Logical Memory: 18.0. APOEε4 alleles: 1.0. Biomarker levels: Florbetapir (AV45): 1.20 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measurements show normal or above-average volumes in all regions, including the hippocampus and entorhinal cortex, which are typically affected in Alzheimer's disease. Cognitive scores (MMSE 30, MoCA 29) are intact, and amyloid PET (AV45) is normal, ruling out significant amyloid pathology.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-25T23:55:12.400074"
}