{
  "ptid_time": "137_S_4331_2012-06-20",
  "img_path": "/data/qiuhui/data/adni/images/137_S_4331/2012-06-20/t1.nii.gz",
  "img_finding": "Image findings: hippocampal volume measures 7,417 mm³, 4.3% above the reference mean. With a Z-score of 0.39 (65.2th percentile), this represents normal volume ; whole brain volume measures 1,091,520 mm³, 12.0% above the reference mean. With a Z-score of 1.51 (93.4th percentile), this represents moderate enlargement; entorhinal cortex volume measures 4,498 mm³, 22.5% above the reference mean. With a Z-score of 1.38 (91.6th percentile), this represents mild enlargement; fusiform gyrus volume measures 17,982 mm³, 5.7% above the reference mean. With a Z-score of 0.52 (69.8th percentile), this represents normal volume ; middle temporal gyrus volume measures 20,426 mm³, 6.6% above the reference mean. With a Z-score of 0.57 (71.5th percentile), this represents normal volume . ",
  "text_data": "Age is 75.8 years. Gender is Female. Education: 15 years. MMSE: 28.0. MoCA: 26.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The hippocampal volume is normal (Z-score 0.39), and other key regions (entorhinal cortex, fusiform gyrus, middle temporal gyrus) show no atrophy—some even exhibit mild to moderate enlargement. Cognitive scores (MMSE 28, MoCA 26) are within normal ranges for age, and APOE4 status (heterozygous) alone does not indicate pathology without supporting evidence of decline.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T16:30:47.565627"
}