{
  "ptid_time": "005_S_0546_2007-07-23",
  "img_path": "/data/qiuhui/data/adni/images/005_S_0546/2007-07-23/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 24,294 mm³, 48.3% below the reference mean. With a Z-score of -1.40 (8.0th percentile), this represents mild atrophy; hippocampal volume measures 7,957 mm³, 14.2% above the reference mean. With a Z-score of 1.23 (89.0th percentile), this represents mild enlargement; whole brain volume measures 908,718 mm³, 11.7% below the reference mean. With a Z-score of -1.53 (6.3th percentile), this represents moderate atrophy; entorhinal cortex volume measures 3,922 mm³, 1.2% below the reference mean. With a Z-score of -0.08 (46.9th percentile), this represents normal volume ; fusiform gyrus volume measures 14,508 mm³, 19.7% below the reference mean. With a Z-score of -1.71 (4.4th percentile), this represents moderate atrophy; middle temporal gyrus volume measures 17,555 mm³, 13.0% below the reference mean. With a Z-score of -1.16 (12.2th percentile), this represents mild atrophy. ",
  "text_data": "Age is 80.4 years. Gender is Male. Education: 16 years. MMSE: 29.0. Logical Memory: 6.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The imaging data shows moderate atrophy in whole brain and fusiform gyrus volumes, along with mild atrophy in ventricular and middle temporal gyrus volumes, which are concerning for neurodegenerative changes. However, hippocampal volume is mildly enlarged, and the MMSE score of 29 is within the normal range, suggesting preserved cognitive function.  \n\n**Diagnosis:** **CN (Cognitively Normal)**  \n**Confidence:** **Medium** (due to conflicting imaging findings—atrophy in some regions but normal hippocampal volume and high MMSE score)",
  "timestamp": "2025-07-25T21:08:06.179998"
}