{
  "ptid_time": "023_S_4448_2019-12-09",
  "img_path": "/data/qiuhui/data/adni/images/023_S_4448/2019-12-09/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 20,306 mm³, 27.7% below the reference mean. With a Z-score of -0.63 (26.3th percentile), this represents normal volume ; hippocampal volume measures 7,957 mm³, 11.8% above the reference mean. With a Z-score of 1.09 (86.1th percentile), this represents mild enlargement; whole brain volume measures 1,038,160 mm³, 6.5% above the reference mean. With a Z-score of 0.82 (79.4th percentile), this represents normal volume ; entorhinal cortex volume measures 4,448 mm³, 21.1% above the reference mean. With a Z-score of 1.30 (90.2th percentile), this represents mild enlargement; fusiform gyrus volume measures 18,593 mm³, 9.3% above the reference mean. With a Z-score of 0.85 (80.1th percentile), this represents normal volume ; middle temporal gyrus volume measures 22,639 mm³, 18.1% above the reference mean. With a Z-score of 1.57 (94.2th percentile), this represents moderate enlargement. ",
  "text_data": "Age is 71.8 years. Gender is Female. Education: 16 years. MMSE: 29.0. MoCA: 28.0. Logical Memory: 21.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.09 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 29, MoCA 28) are within the normal range, and amyloid PET (AV45) is normal, ruling out significant amyloid pathology.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T03:06:01.515616"
}