{
  "ptid_time": "021_S_4335_2013-11-07",
  "img_path": "/data/qiuhui/data/adni/images/021_S_4335/2013-11-07/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 18,281 mm³, 34.9% below the reference mean. With a Z-score of -0.80 (21.2th percentile), this represents normal volume ; hippocampal volume measures 8,270 mm³, 16.2% above the reference mean. With a Z-score of 1.49 (93.2th percentile), this represents mild enlargement; whole brain volume measures 1,089,030 mm³, 11.7% above the reference mean. With a Z-score of 1.48 (93.0th percentile), this represents mild enlargement; entorhinal cortex volume measures 4,084 mm³, 11.2% above the reference mean. With a Z-score of 0.69 (75.4th percentile), this represents normal volume ; fusiform gyrus volume measures 21,598 mm³, 26.9% above the reference mean. With a Z-score of 2.45 (99.3th percentile), this represents significant enlargement; middle temporal gyrus volume measures 23,122 mm³, 20.6% above the reference mean. With a Z-score of 1.79 (96.3th percentile), this represents moderate enlargement. ",
  "text_data": "Age is 73.7 years. Gender is Female. Education: 15 years. MMSE: 28.0. MoCA: 27.0. Logical Memory: 19.0. 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 is enlarged, not reduced). Cognitive scores (MMSE 28, MoCA 27) are normal for age, and APOE4-negative status further reduces Alzheimer's risk. Enlarged volumes may reflect individual variability or compensatory mechanisms.  \nDiagnosis: CN (Cognitively Normal)  \nConfidence: High",
  "timestamp": "2025-07-26T01:44:31.278586"
}