{
  "ptid_time": "005_S_0602_2008-08-18",
  "img_path": "/data/qiuhui/data/adni/images/005_S_0602/2008-08-18/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 20,495 mm³, 46.8% below the reference mean. With a Z-score of -1.12 (13.1th percentile), this represents mild atrophy; hippocampal volume measures 8,124 mm³, 7.5% above the reference mean. With a Z-score of 0.73 (76.7th percentile), this represents normal volume ; whole brain volume measures 1,051,080 mm³, 2.6% below the reference mean. With a Z-score of -0.34 (36.7th percentile), this represents normal volume ; entorhinal cortex volume measures 3,746 mm³, 8.6% below the reference mean. With a Z-score of -0.59 (27.9th percentile), this represents normal volume ; fusiform gyrus volume measures 19,276 mm³, 2.3% above the reference mean. With a Z-score of 0.20 (57.8th percentile), this represents normal volume ; middle temporal gyrus volume measures 20,603 mm³, 3.4% below the reference mean. With a Z-score of -0.31 (37.8th percentile), this represents normal volume . ",
  "text_data": "Age is 72.7 years. Gender is Male. Education: 17 years. MMSE: 30.0. Logical Memory: 12.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain imaging shows mild ventricular enlargement (mild atrophy) but otherwise normal volumes in key regions like the hippocampus, entorhinal cortex, and temporal structures. The MMSE score of 30 is intact, and there is no APOE4 genetic risk factor.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-25T21:13:08.351360"
}