{
  "ptid_time": "002_S_1018_2007-12-07",
  "img_path": "/data/qiuhui/data/adni/images/002_S_1018/2007-12-07/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 23,045 mm³, 17.9% below the reference mean. With a Z-score of -0.41 (34.1th percentile), this represents normal volume ; hippocampal volume measures 6,791 mm³, 4.5% below the reference mean. With a Z-score of -0.42 (33.8th percentile), this represents normal volume ; whole brain volume measures 985,330 mm³, 1.1% above the reference mean. With a Z-score of 0.14 (55.5th percentile), this represents normal volume ; entorhinal cortex volume measures 3,210 mm³, 12.6% below the reference mean. With a Z-score of -0.77 (22.0th percentile), this represents normal volume ; fusiform gyrus volume measures 15,958 mm³, 6.2% below the reference mean. With a Z-score of -0.56 (28.6th percentile), this represents normal volume ; middle temporal gyrus volume measures 17,098 mm³, 10.8% below the reference mean. With a Z-score of -0.94 (17.4th percentile), this represents normal volume . ",
  "text_data": "Age is 71.7 years. Gender is Female. Education: 13 years. MMSE: 29.0. Logical Memory: 2.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: AD.",
  "gpt_diagnosis": "**Reasoning:** All brain volumes (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 29 is within the normal range (≥26), and there is no APOE4 allele, which reduces genetic risk for Alzheimer's.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-25T20:09:25.665144"
}