{
  "ptid_time": "033_S_1086_2008-12-03",
  "img_path": "/data/qiuhui/data/adni/images/033_S_1086/2008-12-03/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 42,486 mm³, 9.6% below the reference mean. With a Z-score of -0.28 (39.0th percentile), this represents normal volume ; hippocampal volume measures 6,651 mm³, 4.6% below the reference mean. With a Z-score of -0.39 (34.7th percentile), this represents normal volume ; whole brain volume measures 995,590 mm³, 3.3% below the reference mean. With a Z-score of -0.43 (33.5th percentile), this represents normal volume ; entorhinal cortex volume measures 3,219 mm³, 18.9% below the reference mean. With a Z-score of -1.24 (10.8th percentile), this represents mild atrophy; fusiform gyrus volume measures 17,451 mm³, 3.4% below the reference mean. With a Z-score of -0.29 (38.4th percentile), this represents normal volume ; middle temporal gyrus volume measures 22,224 mm³, 10.2% above the reference mean. With a Z-score of 0.91 (81.9th percentile), this represents normal volume . ",
  "text_data": "Age is 83.4 years. Gender is Male. Education: 20 years. MMSE: 28.0. Logical Memory: 16.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measurements show mild atrophy in the entorhinal cortex (Z-score -1.24, 10.8th percentile), while other regions (hippocampus, whole brain, fusiform gyrus, middle temporal gyrus) are within normal ranges. The MMSE score of 28 is normal, and the APOE4 status (heterozygous) suggests some genetic risk but does not confirm impairment.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to mild entorhinal atrophy but otherwise normal cognitive and structural findings)",
  "timestamp": "2025-07-26T05:27:57.922806"
}