{
  "ptid_time": "007_S_1222_2007-08-28",
  "img_path": "/data/qiuhui/data/adni/images/007_S_1222/2007-08-28/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 17,750 mm³, 36.8% below the reference mean. With a Z-score of -0.84 (20.0th percentile), this represents normal volume ; hippocampal volume measures 7,088 mm³, 0.4% below the reference mean. With a Z-score of -0.03 (48.6th percentile), this represents normal volume ; whole brain volume measures 911,623 mm³, 6.5% below the reference mean. With a Z-score of -0.81 (20.8th percentile), this represents normal volume ; entorhinal cortex volume measures 3,333 mm³, 9.3% below the reference mean. With a Z-score of -0.57 (28.5th percentile), this represents normal volume ; fusiform gyrus volume measures 15,499 mm³, 8.9% below the reference mean. With a Z-score of -0.81 (20.9th percentile), this represents normal volume ; middle temporal gyrus volume measures 18,404 mm³, 4.0% below the reference mean. With a Z-score of -0.35 (36.4th percentile), this represents normal volume . ",
  "text_data": "Age is 73.9 years. Gender is Female. Education: 16 years. MMSE: 28.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "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 28 is within the normal range (≥26), and the absence of APOE4 further reduces Alzheimer's risk. No significant atrophy or cognitive impairment is evident.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-25T21:53:51.794528"
}