{
  "ptid_time": "041_S_0679_2018-06-21",
  "img_path": "/data/qiuhui/data/adni/images/041_S_0679/2018-06-21/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 30,439 mm³, 21.0% below the reference mean. With a Z-score of -0.50 (30.8th percentile), this represents normal volume ; hippocampal volume measures 7,603 mm³, 0.6% above the reference mean. With a Z-score of 0.06 (52.2th percentile), this represents normal volume ; whole brain volume measures 1,132,790 mm³, 4.9% above the reference mean. With a Z-score of 0.64 (74.0th percentile), this represents normal volume ; entorhinal cortex volume measures 4,765 mm³, 16.2% above the reference mean. With a Z-score of 1.10 (86.4th percentile), this represents mild enlargement; fusiform gyrus volume measures 20,995 mm³, 11.4% above the reference mean. With a Z-score of 0.98 (83.5th percentile), this represents normal volume ; middle temporal gyrus volume measures 22,982 mm³, 7.7% above the reference mean. With a Z-score of 0.69 (75.6th percentile), this represents normal volume . ",
  "text_data": "Age is 74.9 years. Gender is Male. Education: 18 years. MMSE: 30.0. MoCA: 28.0. Logical Memory: 15.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** All brain volumes (hippocampal, whole brain, entorhinal cortex, fusiform gyrus, middle temporal gyrus) are within normal ranges or mildly enlarged, with no significant atrophy. Cognitive scores (MMSE 30, MoCA 28) are intact, and APOE4-negative status further reduces Alzheimer's risk.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T07:01:12.338307"
}