{
  "ptid_time": "137_S_0668_2008-09-04",
  "img_path": "/data/qiuhui/data/adni/images/137_S_0668/2008-09-04/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 30,594 mm³, 20.6% below the reference mean. With a Z-score of -0.49 (31.1th percentile), this represents normal volume ; whole brain volume measures 938,681 mm³, 13.0% below the reference mean. With a Z-score of -1.69 (4.5th percentile), this represents moderate atrophy. ",
  "text_data": "Age is 75.5 years. Gender is Male. Education: 12 years. MMSE: 28.0. Logical Memory: 4.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "Reasoning: The patient shows moderate whole brain atrophy (Z-score -1.69, 4.5th percentile) but normal ventricular volume. Despite this structural change, cognitive performance (MMSE 28/30) remains intact, and there is no genetic risk (APOE4 negative).  \nDiagnosis: CN (Cognitively Normal)  \nConfidence: Medium (Brain atrophy is notable, but clinical and genetic factors suggest preserved cognition)",
  "timestamp": "2025-07-26T16:13:22.529104"
}