{
  "ptid_time": "137_S_0459_2007-05-17",
  "img_path": "/data/qiuhui/data/adni/images/137_S_0459/2007-05-17/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 35,959 mm³, 6.6% below the reference mean. With a Z-score of -0.16 (43.7th percentile), this represents normal volume ; hippocampal volume measures 7,494 mm³, 0.9% below the reference mean. With a Z-score of -0.08 (46.7th percentile), this represents normal volume ; whole brain volume measures 1,003,530 mm³, 7.0% below the reference mean. With a Z-score of -0.91 (18.1th percentile), this represents normal volume ; entorhinal cortex volume measures 3,522 mm³, 14.1% below the reference mean. With a Z-score of -0.96 (16.9th percentile), this represents normal volume ; fusiform gyrus volume measures 15,465 mm³, 17.9% below the reference mean. With a Z-score of -1.53 (6.4th percentile), this represents moderate atrophy; middle temporal gyrus volume measures 18,574 mm³, 13.0% below the reference mean. With a Z-score of -1.16 (12.2th percentile), this represents mild atrophy. ",
  "text_data": "Age is 73.9 years. Gender is Male. Education: 16 years. MMSE: 29.0. Logical Memory: 8.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume data shows mostly normal measurements, with mild to moderate atrophy in the fusiform gyrus and middle temporal gyrus. However, cognitive performance (MMSE: 29) is intact, and there is no APOE4 genetic risk factor. The mild atrophy in temporoparietal regions does not yet correlate with significant cognitive decline.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to isolated atrophy in some regions but preserved cognition)",
  "timestamp": "2025-07-26T16:10:55.470480"
}