{
  "ptid_time": "031_S_4590_2012-10-01",
  "img_path": "/data/qiuhui/data/adni/images/031_S_4590/2012-10-01/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 15,425 mm³, 30.9% below the reference mean. With a Z-score of -0.77 (21.9th percentile), this represents normal volume ; hippocampal volume measures 9,764 mm³, 27.1% above the reference mean. With a Z-score of 3.04 (99.9th percentile), this represents profound enlargement; whole brain volume measures 1,067,990 mm³, 3.8% above the reference mean. With a Z-score of 0.47 (68.1th percentile), this represents normal volume ; entorhinal cortex volume measures 3,862 mm³, 0.8% below the reference mean. With a Z-score of -0.06 (47.5th percentile), this represents normal volume ; fusiform gyrus volume measures 16,001 mm³, 12.1% below the reference mean. With a Z-score of -1.37 (8.6th percentile), this represents mild atrophy; middle temporal gyrus volume measures 21,338 mm³, 4.0% above the reference mean. With a Z-score of 0.35 (63.9th percentile), this represents normal volume . ",
  "text_data": "Age is 60.7 years. Gender is Female. Education: 16 years. MMSE: 28.0. MoCA: 29.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "Reasoning: The hippocampal volume is profoundly enlarged (99.9th percentile), which is atypical for Alzheimer's pathology, while other regions (ventricular, whole brain, entorhinal cortex, middle temporal gyrus) are normal. The fusiform gyrus shows mild atrophy (8.6th percentile), but cognitive scores (MMSE 28, MoCA 29) are intact, and APOE4 is negative.  \nDiagnosis: CN (Cognitively Normal)  \nConfidence: Medium (hippocampal enlargement is unusual and may warrant further investigation, but cognitive performance supports normal status)",
  "timestamp": "2025-07-26T04:50:26.791010"
}