{
  "ptid_time": "109_S_1183_2008-07-16",
  "img_path": "/data/qiuhui/data/adni/images/109_S_1183/2008-07-16/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 44,194 mm³, 6.0% below the reference mean. With a Z-score of -0.17 (43.1th percentile), this represents normal volume ; hippocampal volume measures 7,077 mm³, 1.6% above the reference mean. With a Z-score of 0.14 (55.4th percentile), this represents normal volume ; whole brain volume measures 954,087 mm³, 7.3% below the reference mean. With a Z-score of -0.96 (17.0th percentile), this represents normal volume ; entorhinal cortex volume measures 4,220 mm³, 6.3% above the reference mean. With a Z-score of 0.41 (66.1th percentile), this represents normal volume ; fusiform gyrus volume measures 14,976 mm³, 17.1% below the reference mean. With a Z-score of -1.48 (6.9th percentile), this represents mild atrophy; middle temporal gyrus volume measures 17,054 mm³, 15.5% below the reference mean. With a Z-score of -1.39 (8.3th percentile), this represents mild atrophy. ",
  "text_data": "Age is 81.7 years. Gender is Male. Education: 16 years. MMSE: 29.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measurements show normal volumes in most regions, including the hippocampus and entorhinal cortex, which are critical for Alzheimer's diagnosis. The fusiform gyrus and middle temporal gyrus show mild atrophy, but the MMSE score of 29 is within the normal range, and there is no APOE4 risk allele.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to mild atrophy in some regions but strong cognitive performance and lack of genetic risk)",
  "timestamp": "2025-07-26T11:30:56.083421"
}