{
  "ptid_time": "041_S_1418_2007-07-27",
  "img_path": "/data/qiuhui/data/adni/images/041_S_1418/2007-07-27/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 37,774 mm³, 19.7% below the reference mean. With a Z-score of -0.57 (28.4th percentile), this represents normal volume ; hippocampal volume measures 6,630 mm³, 4.9% below the reference mean. With a Z-score of -0.42 (33.8th percentile), this represents normal volume ; whole brain volume measures 998,589 mm³, 3.0% below the reference mean. With a Z-score of -0.39 (34.9th percentile), this represents normal volume ; entorhinal cortex volume measures 2,699 mm³, 32.0% below the reference mean. With a Z-score of -2.09 (1.8th percentile), this represents significant atrophy; fusiform gyrus volume measures 18,443 mm³, 2.1% above the reference mean. With a Z-score of 0.18 (57.2th percentile), this represents normal volume ; middle temporal gyrus volume measures 17,789 mm³, 11.8% below the reference mean. With a Z-score of -1.06 (14.5th percentile), this represents mild atrophy. ",
  "text_data": "Age is 81.5 years. Gender is Male. Education: 12 years. Handedness: Right. Race: White. Medical history: Cardiovascular; Musculoskeletal; Malignancy; Major Surgical Procedures. MMSE: 29.0. Logical Memory: 4.0. APOEε4 alleles: 0.0. Biomarker levels: Pittsburgh compound B: 1.33 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "Reasoning: The entorhinal cortex shows significant atrophy (Z-score -2.09, 1.8th percentile), which is a strong biomarker for Alzheimer's pathology. However, hippocampal and whole brain volumes are normal, and the MMSE score of 29 is within the normal range, suggesting preserved cognitive function.  \nDiagnosis: CN (Cognitively Normal)  \nConfidence: Medium  \n\n(While entorhinal cortex atrophy is concerning, the absence of cognitive impairment and normal hippocampal volume make dementia or MCI less likely. However, the atrophy may indicate preclinical Alzheimer's changes.)",
  "timestamp": "2025-07-26T07:05:49.242580"
}