{
  "ptid_time": "011_S_4075_2013-06-07",
  "img_path": "/data/qiuhui/data/adni/images/011_S_4075/2013-06-07/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 33,418 mm³, 13.2% below the reference mean. With a Z-score of -0.32 (37.6th percentile), this represents normal volume ; hippocampal volume measures 6,776 mm³, 10.4% below the reference mean. With a Z-score of -1.01 (15.6th percentile), this represents mild atrophy; whole brain volume measures 1,079,890 mm³, 0.0% above the reference mean. With a Z-score of 0.01 (50.2th percentile), this represents normal volume ; entorhinal cortex volume measures 4,270 mm³, 4.1% above the reference mean. With a Z-score of 0.28 (61.0th percentile), this represents normal volume ; fusiform gyrus volume measures 18,722 mm³, 0.6% below the reference mean. With a Z-score of -0.05 (47.9th percentile), this represents normal volume ; middle temporal gyrus volume measures 20,396 mm³, 4.4% below the reference mean. With a Z-score of -0.40 (34.6th percentile), this represents normal volume . ",
  "text_data": "Age is 75.4 years. Gender is Male. Education: 16 years. MMSE: 30.0. MoCA: 28.0. Logical Memory: 11.0. APOEε4 alleles: 1.0. Biomarker levels: Florbetapir (AV45): 0.98 SUVR (normal ); Total tau: 291.10 pg/mL (normal ); Phosphorylated tau: 24.42 pg/mL (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The hippocampal volume shows mild atrophy (Z-score -1.01, 15.6th percentile), which is a common early marker of Alzheimer's pathology, but all other brain volumes are within normal ranges. Cognitive scores (MMSE 30, MoCA 28) are intact, and biomarkers (T-tau, P-tau, AV45) are normal, suggesting no significant cognitive impairment or neurodegeneration at this stage.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to hippocampal atrophy but otherwise normal clinical and biomarker profile)",
  "timestamp": "2025-07-25T22:53:14.307575"
}