{
  "ptid_time": "037_S_4410_2017-03-01",
  "img_path": "/data/qiuhui/data/adni/images/037_S_4410/2017-03-01/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 21,308 mm³, 24.1% below the reference mean. With a Z-score of -0.55 (29.1th percentile), this represents normal volume ; hippocampal volume measures 5,791 mm³, 18.6% below the reference mean. With a Z-score of -1.71 (4.4th percentile), this represents moderate atrophy; whole brain volume measures 944,427 mm³, 3.1% below the reference mean. With a Z-score of -0.39 (34.8th percentile), this represents normal volume ; entorhinal cortex volume measures 2,747 mm³, 25.2% below the reference mean. With a Z-score of -1.55 (6.1th percentile), this represents moderate atrophy; fusiform gyrus volume measures 17,849 mm³, 4.9% above the reference mean. With a Z-score of 0.45 (67.3th percentile), this represents normal volume ; middle temporal gyrus volume measures 18,985 mm³, 1.0% below the reference mean. With a Z-score of -0.08 (46.7th percentile), this represents normal volume . ",
  "text_data": "Age is 74.1 years. Gender is Female. Education: 14 years. MMSE: 30.0. MoCA: 30.0. Logical Memory: 16.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.06 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "Reasoning: The hippocampal and entorhinal cortex volumes show moderate atrophy (Z-scores of -1.71 and -1.55, respectively), which are key regions affected in Alzheimer's disease. However, cognitive scores (MMSE, MoCA) are intact, and amyloid PET (AV45) is normal, suggesting no significant clinical impairment or amyloid pathology.  \nDiagnosis: CN (Cognitively Normal)  \nConfidence: Medium (structural atrophy raises concern, but normal cognition and amyloid findings support CN).",
  "timestamp": "2025-07-26T06:46:37.416828"
}