{
  "ptid_time": "057_S_0957_2007-05-09",
  "img_path": "/data/qiuhui/data/adni/images/057_S_0957/2007-05-09/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 27,535 mm³, 28.5% below the reference mean. With a Z-score of -0.68 (24.7th percentile), this represents normal volume ; hippocampal volume measures 6,971 mm³, 7.8% below the reference mean. With a Z-score of -0.76 (22.4th percentile), this represents normal volume ; whole brain volume measures 1,086,140 mm³, 0.6% above the reference mean. With a Z-score of 0.08 (53.2th percentile), this represents normal volume ; entorhinal cortex volume measures 3,850 mm³, 6.1% below the reference mean. With a Z-score of -0.41 (33.9th percentile), this represents normal volume ; fusiform gyrus volume measures 16,040 mm³, 14.9% below the reference mean. With a Z-score of -1.27 (10.3th percentile), this represents mild atrophy; middle temporal gyrus volume measures 19,631 mm³, 8.0% below the reference mean. With a Z-score of -0.72 (23.6th percentile), this represents normal volume . ",
  "text_data": "Age is 74.5 years. Gender is Male. Education: 9 years. MMSE: 27.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measurements show mostly normal values, with only mild atrophy in the fusiform gyrus (Z-score -1.27, 10.3th percentile). The hippocampal and entorhinal cortex volumes are within normal ranges, and the MMSE score of 27 is within the normal range for cognitive function. The presence of one APOE4 allele increases Alzheimer's risk but does not confirm impairment.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to mild fusiform gyrus atrophy, but no significant cognitive or structural deficits)",
  "timestamp": "2025-07-26T08:08:02.177037"
}