{
  "ptid_time": "126_S_1077_2008-12-08",
  "img_path": "/data/qiuhui/data/adni/images/126_S_1077/2008-12-08/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 45,896 mm³, 2.4% below the reference mean. With a Z-score of -0.07 (47.2th percentile), this represents normal volume ; hippocampal volume measures 7,431 mm³, 6.6% above the reference mean. With a Z-score of 0.57 (71.7th percentile), this represents normal volume ; whole brain volume measures 1,019,710 mm³, 0.9% below the reference mean. With a Z-score of -0.12 (45.2th percentile), this represents normal volume ; entorhinal cortex volume measures 3,799 mm³, 4.3% below the reference mean. With a Z-score of -0.28 (39.0th percentile), this represents normal volume ; fusiform gyrus volume measures 16,523 mm³, 8.5% below the reference mean. With a Z-score of -0.74 (23.0th percentile), this represents normal volume ; middle temporal gyrus volume measures 20,096 mm³, 0.4% below the reference mean. With a Z-score of -0.03 (48.7th percentile), this represents normal volume . ",
  "text_data": "Age is 85.3 years. Gender is Male. Education: 15 years. MMSE: 27.0. Logical Memory: 7.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: AD.",
  "gpt_diagnosis": "**Reasoning:** All brain volume measures (ventricular, hippocampal, whole brain, entorhinal cortex, fusiform gyrus, and middle temporal gyrus) fall within normal ranges based on Z-scores and percentiles. The MMSE score of 27 is within the normal range for cognitive function, and the absence of APOE4 alleles further reduces Alzheimer's risk.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T12:42:08.308755"
}