{
  "ptid_time": "037_S_1421_2008-02-20",
  "img_path": "/data/qiuhui/data/adni/images/037_S_1421/2008-02-20/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 25,682 mm³, 8.5% below the reference mean. With a Z-score of -0.19 (42.3th percentile), this represents normal volume ; hippocampal volume measures 5,450 mm³, 23.4% below the reference mean. With a Z-score of -2.15 (1.6th percentile), this represents significant atrophy; whole brain volume measures 908,142 mm³, 6.8% below the reference mean. With a Z-score of -0.86 (19.5th percentile), this represents normal volume ; entorhinal cortex volume measures 3,080 mm³, 16.1% below the reference mean. With a Z-score of -0.99 (16.1th percentile), this represents normal volume ; fusiform gyrus volume measures 15,816 mm³, 7.0% below the reference mean. With a Z-score of -0.64 (26.1th percentile), this represents normal volume ; middle temporal gyrus volume measures 17,454 mm³, 8.9% below the reference mean. With a Z-score of -0.78 (21.9th percentile), this represents normal volume . ",
  "text_data": "Age is 74.9 years. Gender is Female. Education: 12 years. MMSE: 28.0. Laboratory findings: . APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "Reasoning: The hippocampal volume shows significant atrophy (Z-score -2.15, 1.6th percentile), which is a strong biomarker for Alzheimer's pathology. However, other brain regions (ventricular, whole brain, entorhinal cortex, fusiform gyrus, middle temporal gyrus) are within normal ranges, and the MMSE score of 28 is intact.  \nDiagnosis: **MCI** (due to isolated hippocampal atrophy but preserved global cognition)  \nConfidence: **Medium** (clinical correlation needed to confirm functional impact)",
  "timestamp": "2025-07-26T06:37:25.414553"
}