{
  "ptid_time": "109_S_1014_2009-01-22",
  "img_path": "/data/qiuhui/data/adni/images/109_S_1014/2009-01-22/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 45,300 mm³, 22.6% above the reference mean. With a Z-score of 0.61 (72.9th percentile), this represents normal volume ; hippocampal volume measures 7,942 mm³, 22.3% above the reference mean. With a Z-score of 1.79 (96.3th percentile), this represents moderate enlargement; whole brain volume measures 973,886 mm³, 4.9% above the reference mean. With a Z-score of 0.59 (72.3th percentile), this represents normal volume ; entorhinal cortex volume measures 3,345 mm³, 3.4% below the reference mean. With a Z-score of -0.18 (42.7th percentile), this represents normal volume ; fusiform gyrus volume measures 13,594 mm³, 15.6% below the reference mean. With a Z-score of -1.17 (12.0th percentile), this represents mild atrophy; middle temporal gyrus volume measures 17,627 mm³, 2.2% below the reference mean. With a Z-score of -0.20 (42.1th percentile), this represents normal volume . ",
  "text_data": "Age is 86.7 years. Gender is Female. Education: 15 years. MMSE: 30.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume data shows normal or above-average volumes in most regions, including the hippocampus, which is moderately enlarged. The fusiform gyrus shows mild atrophy, but other key regions (entorhinal cortex, middle temporal gyrus) are within normal ranges. The MMSE score of 30 (perfect) and absence of APOE4 further support no significant cognitive impairment.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T11:29:31.821323"
}