{
  "ptid_time": "014_S_4401_2016-07-08",
  "img_path": "/data/qiuhui/data/adni/images/014_S_4401/2016-07-08/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 22,727 mm³, 19.0% below the reference mean. With a Z-score of -0.44 (33.2th percentile), this represents normal volume ; hippocampal volume measures 7,871 mm³, 10.6% above the reference mean. With a Z-score of 0.98 (83.5th percentile), this represents normal volume ; whole brain volume measures 1,098,490 mm³, 12.7% above the reference mean. With a Z-score of 1.60 (94.5th percentile), this represents moderate enlargement; entorhinal cortex volume measures 3,746 mm³, 2.0% above the reference mean. With a Z-score of 0.12 (54.9th percentile), this represents normal volume ; fusiform gyrus volume measures 19,697 mm³, 15.8% above the reference mean. With a Z-score of 1.44 (92.4th percentile), this represents mild enlargement; middle temporal gyrus volume measures 25,430 mm³, 32.7% above the reference mean. With a Z-score of 2.84 (99.8th percentile), this represents significant enlargement. ",
  "text_data": "Age is 71.5 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): 1.11 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. 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": "2025-07-25T23:55:06.994941"
}