{
  "ptid_time": "062_S_0578_2006-12-20",
  "img_path": "/data/qiuhui/data/adni/images/062_S_0578/2006-12-20/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 36,731 mm³, 30.9% above the reference mean. With a Z-score of 0.71 (76.0th percentile), this represents normal volume ; hippocampal volume measures 6,141 mm³, 13.7% below the reference mean. With a Z-score of -1.26 (10.5th percentile), this represents mild atrophy; whole brain volume measures 914,449 mm³, 6.2% below the reference mean. With a Z-score of -0.78 (21.8th percentile), this represents normal volume ; entorhinal cortex volume measures 3,503 mm³, 4.6% below the reference mean. With a Z-score of -0.28 (38.8th percentile), this represents normal volume ; fusiform gyrus volume measures 16,100 mm³, 5.4% below the reference mean. With a Z-score of -0.49 (31.3th percentile), this represents normal volume ; middle temporal gyrus volume measures 19,016 mm³, 0.8% below the reference mean. With a Z-score of -0.07 (47.2th percentile), this represents normal volume . ",
  "text_data": "Age is 77.5 years. Gender is Female. Education: 14 years. MMSE: 30.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The hippocampal volume shows mild atrophy (Z-score -1.26, 10.5th percentile), which is a common early marker of Alzheimer's pathology, while other brain regions remain within normal ranges. The MMSE score of 30 is intact, and there is no APOE4 risk allele, suggesting no significant cognitive impairment at this stage.  \n\n**Diagnosis:** **Mild Cognitive Impairment (MCI)** (due to hippocampal atrophy but preserved cognition)  \n**Confidence:** **Medium** (clinical correlation needed to confirm functional impact)",
  "timestamp": "2025-07-26T08:16:40.397877"
}