{
  "ptid_time": "067_S_0056_2006-07-07",
  "img_path": "/data/qiuhui/data/adni/images/067_S_0056/2006-07-07/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 13,583 mm³, 51.6% below the reference mean. With a Z-score of -1.18 (11.9th percentile), this represents mild atrophy; hippocampal volume measures 7,582 mm³, 6.6% above the reference mean. With a Z-score of 0.60 (72.7th percentile), this represents normal volume ; whole brain volume measures 923,716 mm³, 5.2% below the reference mean. With a Z-score of -0.66 (25.5th percentile), this represents normal volume ; entorhinal cortex volume measures 3,218 mm³, 12.4% below the reference mean. With a Z-score of -0.76 (22.4th percentile), this represents normal volume ; fusiform gyrus volume measures 15,730 mm³, 7.5% below the reference mean. With a Z-score of -0.69 (24.6th percentile), this represents normal volume ; middle temporal gyrus volume measures 14,642 mm³, 23.6% below the reference mean. With a Z-score of -2.05 (2.0th percentile), this represents significant atrophy. ",
  "text_data": "Age is 70.1 years. Gender is Female. Education: 13 years. MMSE: 29.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain imaging shows mild ventricular enlargement and significant atrophy in the middle temporal gyrus, while hippocampal and other regional volumes are within normal ranges. The MMSE score of 29 is intact, and there is no APOE4 genetic risk factor.  \n\n**Diagnosis:** **Cognitively Normal (CN)**  \n**Confidence:** **Medium** (The middle temporal gyrus atrophy is concerning, but the lack of cognitive impairment and other normal volumes suggest no current dementia or MCI.)",
  "timestamp": "2025-07-26T08:22:19.689826"
}