{
  "ptid_time": "009_S_5176_2017-10-06",
  "img_path": "/data/qiuhui/data/adni/images/009_S_5176/2017-10-06/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 41,669 mm³, 48.5% above the reference mean. With a Z-score of 1.11 (86.6th percentile), this represents mild enlargement; hippocampal volume measures 6,749 mm³, 5.1% below the reference mean. With a Z-score of -0.47 (31.9th percentile), this represents normal volume ; whole brain volume measures 1,013,670 mm³, 4.0% above the reference mean. With a Z-score of 0.50 (69.3th percentile), this represents normal volume ; entorhinal cortex volume measures 3,837 mm³, 4.5% above the reference mean. With a Z-score of 0.27 (60.8th percentile), this represents normal volume ; fusiform gyrus volume measures 19,456 mm³, 14.4% above the reference mean. With a Z-score of 1.31 (90.4th percentile), this represents mild enlargement; middle temporal gyrus volume measures 22,085 mm³, 15.2% above the reference mean. With a Z-score of 1.32 (90.7th percentile), this represents mild enlargement. ",
  "text_data": "Age is 70.2 years. Gender is Female. Education: 18 years. MMSE: 30.0. MoCA: 29.0. Logical Memory: 12.0. APOEε4 alleles: 1.0. Biomarker levels: Florbetapir (AV45): 1.12 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain imaging shows mild ventricular enlargement (a common age-related change) but otherwise normal hippocampal, whole brain, entorhinal cortex, and fusiform/middle temporal gyrus volumes. Cognitive testing (MMSE 30, MoCA 29) is intact, and amyloid PET (AV45) is normal, making neurodegenerative dementia unlikely. APOE4 heterozygosity is a risk factor but not diagnostic.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-25T22:27:53.760286"
}