{
  "ptid_time": "116_S_0370_2007-05-14",
  "img_path": "/data/qiuhui/data/adni/images/116_S_0370/2007-05-14/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 26,680 mm³, 4.9% below the reference mean. With a Z-score of -0.11 (45.5th percentile), this represents normal volume ; hippocampal volume measures 8,142 mm³, 14.4% above the reference mean. With a Z-score of 1.32 (90.7th percentile), this represents mild enlargement; whole brain volume measures 946,897 mm³, 2.8% below the reference mean. With a Z-score of -0.36 (36.0th percentile), this represents normal volume ; entorhinal cortex volume measures 4,666 mm³, 27.0% above the reference mean. With a Z-score of 1.66 (95.2th percentile), this represents moderate enlargement; fusiform gyrus volume measures 17,483 mm³, 2.8% above the reference mean. With a Z-score of 0.25 (59.9th percentile), this represents normal volume ; middle temporal gyrus volume measures 16,971 mm³, 11.5% below the reference mean. With a Z-score of -1.00 (16.0th percentile), this represents normal volume . ",
  "text_data": "Age is 75.5 years. Gender is Female. Education: 16 years. MMSE: 26.0. Logical Memory: 0.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: AD.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measurements show normal or above-average volumes in most regions, including the hippocampus and entorhinal cortex, which are typically affected in Alzheimer's. The MMSE score of 26 is within the normal range (24-30), and the absence of APOE4 further reduces Alzheimer's risk.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T11:52:37.209924"
}