{
  "ptid_time": "127_S_4843_2012-07-18",
  "img_path": "/data/qiuhui/data/adni/images/127_S_4843/2012-07-18/t1.nii.gz",
  "img_finding": "Image findings: hippocampal volume measures 8,154 mm³, 14.6% above the reference mean. With a Z-score of 1.34 (91.0th percentile), this represents mild enlargement; whole brain volume measures 1,096,990 mm³, 12.6% above the reference mean. With a Z-score of 1.58 (94.3th percentile), this represents moderate enlargement; entorhinal cortex volume measures 3,508 mm³, 4.5% below the reference mean. With a Z-score of -0.28 (39.1th percentile), this represents normal volume ; fusiform gyrus volume measures 18,314 mm³, 7.6% above the reference mean. With a Z-score of 0.70 (75.7th percentile), this represents normal volume ; middle temporal gyrus volume measures 23,365 mm³, 21.9% above the reference mean. With a Z-score of 1.90 (97.1th percentile), this represents moderate enlargement. ",
  "text_data": "Age is 73.4 years. Gender is Female. Education: 13 years. Handedness: Right. Race: Black or African American. Medical history: Cardiovascular; Allergies or Drug Sensitivities; Major Surgical Procedures. MMSE: 29.0. MoCA: 25.0. Logical Memory: 10.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.18 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "Reasoning: The hippocampal and whole brain volumes are significantly above the reference mean, which is atypical for Alzheimer's disease (AD) as AD typically involves atrophy. The entorhinal cortex volume is normal, and the fusiform gyrus and middle temporal gyrus volumes are also above average. Cognitive scores (MMSE 29, MoCA 25) are within normal limits, and amyloid PET (AV45) is normal, ruling out significant amyloid pathology.  \nDiagnosis: CN (Cognitively Normal)  \nConfidence: High",
  "timestamp": "2025-07-26T13:21:51.371938"
}