{
  "ptid_time": "067_S_0257_2009-08-12",
  "img_path": "/data/qiuhui/data/adni/images/067_S_0257/2009-08-12/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 25,104 mm³, 32.1% below the reference mean. With a Z-score of -0.87 (19.3th percentile), this represents normal volume ; hippocampal volume measures 5,878 mm³, 9.5% below the reference mean. With a Z-score of -0.76 (22.3th percentile), this represents normal volume ; whole brain volume measures 826,752 mm³, 10.9% below the reference mean. With a Z-score of -1.31 (9.5th percentile), this represents mild atrophy; entorhinal cortex volume measures 3,609 mm³, 4.2% above the reference mean. With a Z-score of 0.23 (59.0th percentile), this represents normal volume ; fusiform gyrus volume measures 13,498 mm³, 16.2% below the reference mean. With a Z-score of -1.22 (11.1th percentile), this represents mild atrophy; middle temporal gyrus volume measures 15,967 mm³, 11.4% below the reference mean. With a Z-score of -1.02 (15.4th percentile), this represents mild atrophy. ",
  "text_data": "Age is 81.5 years. Gender is Female. Education: 6 years. MMSE: 29.0. Logical Memory: 18.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain imaging shows mild atrophy in the whole brain, fusiform gyrus, and middle temporal gyrus, but hippocampal and ventricular volumes are within normal ranges. The MMSE score of 29 is normal, and there is no significant cognitive impairment reported.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to mild atrophy in some regions but preserved cognitive function and normal hippocampal volume)",
  "timestamp": "2025-07-26T08:27:46.621555"
}