{
  "ptid_time": "057_S_0464_2009-06-24",
  "img_path": "/data/qiuhui/data/adni/images/057_S_0464/2009-06-24/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 51,686 mm³, 9.9% above the reference mean. With a Z-score of 0.29 (61.4th percentile), this represents normal volume ; hippocampal volume measures 6,664 mm³, 4.4% below the reference mean. With a Z-score of -0.38 (35.3th percentile), this represents normal volume ; whole brain volume measures 949,663 mm³, 7.7% below the reference mean. With a Z-score of -1.01 (15.6th percentile), this represents mild atrophy; entorhinal cortex volume measures 3,665 mm³, 7.7% below the reference mean. With a Z-score of -0.50 (30.8th percentile), this represents normal volume ; fusiform gyrus volume measures 19,389 mm³, 7.3% above the reference mean. With a Z-score of 0.63 (73.7th percentile), this represents normal volume ; middle temporal gyrus volume measures 21,495 mm³, 6.6% above the reference mean. With a Z-score of 0.59 (72.2th percentile), this represents normal volume . ",
  "text_data": "Age is 86.1 years. Gender is Male. Education: 16 years. MMSE: 29.0. Logical Memory: 7.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The brain imaging shows mild whole-brain atrophy (Z-score -1.01, 15.6th percentile), but hippocampal and other key regional volumes are within normal ranges. The MMSE score of 29 is intact, and there is no APOE4 genetic risk factor.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (mild whole-brain atrophy could suggest early changes, but cognitive performance remains strong)",
  "timestamp": "2025-07-26T08:03:13.415056"
}