{
  "ptid_time": "021_S_0141_2006-08-08",
  "img_path": "/data/qiuhui/data/adni/images/021_S_0141/2006-08-08/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 21,757 mm³, 53.7% below the reference mean. With a Z-score of -1.56 (5.9th percentile), this represents moderate atrophy; hippocampal volume measures 7,039 mm³, 1.0% above the reference mean. With a Z-score of 0.09 (53.5th percentile), this represents normal volume ; whole brain volume measures 1,081,460 mm³, 5.1% above the reference mean. With a Z-score of 0.67 (74.7th percentile), this represents normal volume ; entorhinal cortex volume measures 3,609 mm³, 9.1% below the reference mean. With a Z-score of -0.59 (27.6th percentile), this represents normal volume ; fusiform gyrus volume measures 17,545 mm³, 2.9% below the reference mean. With a Z-score of -0.25 (40.1th percentile), this represents normal volume ; middle temporal gyrus volume measures 18,470 mm³, 8.4% below the reference mean. With a Z-score of -0.76 (22.5th percentile), this represents normal volume . ",
  "text_data": "Age is 81.6 years. Gender is Male. Education: 12 years. MMSE: 27.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The ventricular volume shows moderate atrophy (Z-score -1.56), which is often seen in neurodegenerative conditions, but other key regions (hippocampus, whole brain, entorhinal cortex, fusiform gyrus, middle temporal gyrus) are within normal ranges. The MMSE score of 27 is within normal limits for cognitive function, and the APOE4 carrier status increases Alzheimer's risk but does not confirm pathology alone.  \n\n**Diagnosis:** **CN (Cognitively Normal)**  \n**Confidence:** **Medium** (Ventricular atrophy raises some concern, but preserved hippocampal volume and normal MMSE suggest no significant cognitive impairment at this stage.)",
  "timestamp": "2025-07-26T01:20:06.947128"
}