{
  "ptid_time": "003_S_4441_2013-04-12",
  "img_path": "/data/qiuhui/data/adni/images/003_S_4441/2013-04-12/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 15,487 mm³, 30.7% below the reference mean. With a Z-score of -0.77 (22.1th percentile), this represents normal volume ; hippocampal volume measures 8,783 mm³, 14.3% above the reference mean. With a Z-score of 1.60 (94.6th percentile), this represents moderate enlargement; whole brain volume measures 1,125,250 mm³, 9.3% above the reference mean. With a Z-score of 1.16 (87.7th percentile), this represents mild enlargement; entorhinal cortex volume measures 4,233 mm³, 8.7% above the reference mean. With a Z-score of 0.68 (75.1th percentile), this represents normal volume ; fusiform gyrus volume measures 21,004 mm³, 15.3% above the reference mean. With a Z-score of 1.73 (95.8th percentile), this represents moderate enlargement; middle temporal gyrus volume measures 22,801 mm³, 11.1% above the reference mean. With a Z-score of 0.99 (83.8th percentile), this represents normal volume . ",
  "text_data": "Age is 69.7 years. Gender is Female. Education: 16 years. MMSE: 29.0. MoCA: 30.0. Logical Memory: 15.0. 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 (hippocampus, entorhinal cortex, and middle temporal gyrus are all normal or enlarged). Cognitive scores (MMSE 29, MoCA 30) are intact, and the absence of APOE4 further reduces Alzheimer's risk.  \nDiagnosis: CN (Cognitively Normal)  \nConfidence: High",
  "timestamp": "2025-07-25T20:54:17.667365"
}