{
  "ptid_time": "021_S_4335_2012-11-14",
  "img_path": "/data/qiuhui/data/adni/images/021_S_4335/2012-11-14/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 17,825 mm³, 36.5% below the reference mean. With a Z-score of -0.84 (20.2th percentile), this represents normal volume ; hippocampal volume measures 8,362 mm³, 17.5% above the reference mean. With a Z-score of 1.61 (94.6th percentile), this represents moderate enlargement; whole brain volume measures 1,084,330 mm³, 11.3% above the reference mean. With a Z-score of 1.42 (92.2th percentile), this represents mild enlargement; entorhinal cortex volume measures 4,090 mm³, 11.4% above the reference mean. With a Z-score of 0.70 (75.7th percentile), this represents normal volume ; fusiform gyrus volume measures 21,236 mm³, 24.8% above the reference mean. With a Z-score of 2.26 (98.8th percentile), this represents significant enlargement; middle temporal gyrus volume measures 23,390 mm³, 22.0% above the reference mean. With a Z-score of 1.91 (97.2th percentile), this represents moderate enlargement. ",
  "text_data": "Age is 72.7 years. Gender is Female. Education: 15 years. MMSE: 28.0. MoCA: 30.0. Logical Memory: 20.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume data shows no atrophy in key regions typically affected in Alzheimer's (e.g., hippocampus, entorhinal cortex), with several regions even showing enlargement. Cognitive scores (MMSE 28, MoCA 30) are intact, and the absence of APOE4 further reduces Alzheimer's risk.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T01:44:26.400626"
}