{
  "ptid_time": "137_S_0301_2006-10-31",
  "img_path": "/data/qiuhui/data/adni/images/137_S_0301/2006-10-31/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 11,682 mm³, 58.4% below the reference mean. With a Z-score of -1.34 (9.1th percentile), this represents mild atrophy; hippocampal volume measures 7,587 mm³, 6.6% above the reference mean. With a Z-score of 0.61 (72.9th percentile), this represents normal volume ; whole brain volume measures 997,466 mm³, 2.3% above the reference mean. With a Z-score of 0.29 (61.6th percentile), this represents normal volume ; entorhinal cortex volume measures 3,776 mm³, 2.8% above the reference mean. With a Z-score of 0.17 (56.8th percentile), this represents normal volume ; fusiform gyrus volume measures 15,022 mm³, 11.7% below the reference mean. With a Z-score of -1.07 (14.3th percentile), this represents mild atrophy; middle temporal gyrus volume measures 19,739 mm³, 3.0% above the reference mean. With a Z-score of 0.26 (60.2th percentile), this represents normal volume . ",
  "text_data": "Age is 73.9 years. Gender is Female. Education: 13 years. MMSE: 30.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain imaging shows mild atrophy in the ventricular volume and fusiform gyrus, but all other regions (hippocampus, whole brain, entorhinal cortex, middle temporal gyrus) are within normal ranges. The MMSE score of 30 is intact, and there is no APOE4 genetic risk factor.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to mild atrophy in some regions, but no clinical or cognitive impairment)",
  "timestamp": "2025-07-26T16:08:17.061466"
}