{
  "ptid_time": "036_S_6316_2019-08-13",
  "img_path": "/data/qiuhui/data/adni/images/036_S_6316/2019-08-13/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 31,429 mm³, 12.0% above the reference mean. With a Z-score of 0.27 (60.8th percentile), this represents normal volume ; hippocampal volume measures 8,167 mm³, 14.8% above the reference mean. With a Z-score of 1.36 (91.3th percentile), this represents mild enlargement; whole brain volume measures 1,060,210 mm³, 8.8% above the reference mean. With a Z-score of 1.11 (86.5th percentile), this represents mild enlargement; entorhinal cortex volume measures 3,783 mm³, 3.0% above the reference mean. With a Z-score of 0.18 (57.3th percentile), this represents normal volume ; fusiform gyrus volume measures 20,042 mm³, 17.8% above the reference mean. With a Z-score of 1.62 (94.7th percentile), this represents moderate enlargement; middle temporal gyrus volume measures 20,983 mm³, 9.5% above the reference mean. With a Z-score of 0.82 (79.4th percentile), this represents normal volume . ",
  "text_data": "Age is 78.5 years. Gender is Female. Education: 16 years. MMSE: 30.0. MoCA: 27.0. Logical Memory: 12.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "Reasoning: The brain volume measurements show mild to moderate enlargement in several regions (hippocampus, whole brain, fusiform gyrus) rather than atrophy, which is atypical for Alzheimer's. Cognitive scores (MMSE 30, MoCA 27) are within normal limits for age, and APOE4 status (heterozygous) alone is not diagnostic.  \nDiagnosis: CN (Cognitively Normal)  \nConfidence: Medium (volumetric findings are unusual but cognitive performance is intact; clinical correlation is needed to rule out other explanations for enlarged volumes).",
  "timestamp": "2025-07-26T06:23:02.887132"
}