{
  "ptid_time": "136_S_0196_2009-04-27",
  "img_path": "/data/qiuhui/data/adni/images/136_S_0196/2009-04-27/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 34,538 mm³, 6.6% below the reference mean. With a Z-score of -0.18 (43.0th percentile), this represents normal volume ; hippocampal volume measures 6,455 mm³, 0.6% below the reference mean. With a Z-score of -0.05 (48.0th percentile), this represents normal volume ; whole brain volume measures 898,943 mm³, 3.2% below the reference mean. With a Z-score of -0.38 (35.3th percentile), this represents normal volume ; entorhinal cortex volume measures 3,643 mm³, 5.2% above the reference mean. With a Z-score of 0.28 (61.1th percentile), this represents normal volume ; fusiform gyrus volume measures 16,270 mm³, 1.0% above the reference mean. With a Z-score of 0.07 (53.0th percentile), this represents normal volume ; middle temporal gyrus volume measures 16,623 mm³, 7.8% below the reference mean. With a Z-score of -0.69 (24.4th percentile), this represents normal volume . ",
  "text_data": "Age is 81.0 years. Gender is Female. Education: 18 years. MMSE: 30.0. Logical Memory: 14.0. 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 30 is optimal, and the absence of APOE4 further reduces Alzheimer's risk.  \nDiagnosis: CN (Cognitively Normal)  \nConfidence: High",
  "timestamp": "2025-07-26T16:00:04.796108"
}