{
  "ptid_time": "014_S_0558_2006-06-21",
  "img_path": "/data/qiuhui/data/adni/images/014_S_0558/2006-06-21/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 46,688 mm³, 21.2% above the reference mean. With a Z-score of 0.51 (69.4th percentile), this represents normal volume ; hippocampal volume measures 6,368 mm³, 15.8% below the reference mean. With a Z-score of -1.54 (6.2th percentile), this represents moderate atrophy; whole brain volume measures 1,042,200 mm³, 3.4% below the reference mean. With a Z-score of -0.45 (32.7th percentile), this represents normal volume ; entorhinal cortex volume measures 3,755 mm³, 8.4% below the reference mean. With a Z-score of -0.57 (28.4th percentile), this represents normal volume ; fusiform gyrus volume measures 18,724 mm³, 0.6% below the reference mean. With a Z-score of -0.05 (47.9th percentile), this represents normal volume ; middle temporal gyrus volume measures 20,822 mm³, 2.4% below the reference mean. With a Z-score of -0.22 (41.4th percentile), this represents normal volume . ",
  "text_data": "Age is 79.8 years. Gender is Male. Education: 19 years. Handedness: Right. Race: White. Medical history: Psychiatric; Cardiovascular; Dermatologic-Connective Tissue; Musculoskeletal; Gastrointestinal; Renal-Genitourinary. MMSE: 29.0. Logical Memory: 13.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The hippocampal volume shows moderate atrophy (Z-score -1.54, 6.2th percentile), which is a strong biomarker for Alzheimer's pathology, while other brain regions remain within normal ranges. Despite this, cognitive performance (MMSE 29/30) is intact, suggesting no significant functional impairment.  \n**Diagnosis:** **MCI** (due to structural changes without overt cognitive decline)  \n**Confidence:** **Medium** (high confidence in hippocampal atrophy, but MCI diagnosis is provisional given preserved MMSE; clinical follow-up recommended)",
  "timestamp": "2025-07-25T23:44:01.675941"
}