{
  "ptid_time": "016_S_4638_2013-09-04",
  "img_path": "/data/qiuhui/data/adni/images/016_S_4638/2013-09-04/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 45,815 mm³, 18.9% above the reference mean. With a Z-score of 0.45 (67.5th percentile), this represents normal volume ; hippocampal volume measures 7,499 mm³, 0.8% below the reference mean. With a Z-score of -0.08 (46.9th percentile), this represents normal volume ; whole brain volume measures 1,146,200 mm³, 6.2% above the reference mean. With a Z-score of 0.80 (78.9th percentile), this represents normal volume ; entorhinal cortex volume measures 3,361 mm³, 18.0% below the reference mean. With a Z-score of -1.22 (11.1th percentile), this represents mild atrophy; fusiform gyrus volume measures 19,742 mm³, 4.8% above the reference mean. With a Z-score of 0.41 (65.9th percentile), this represents normal volume ; middle temporal gyrus volume measures 21,419 mm³, 0.4% above the reference mean. With a Z-score of 0.03 (51.3th percentile), this represents normal volume . ",
  "text_data": "Age is 75.0 years. Gender is Male. Education: 17 years. MMSE: 29.0. MoCA: 25.0. Logical Memory: 12.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The entorhinal cortex shows mild atrophy (Z-score -1.22, 11.1th percentile), which is an early marker of Alzheimer's pathology, but other brain volumes (hippocampus, whole brain, etc.) are within normal ranges. Cognitive scores (MMSE 29, MoCA 25) are borderline for MCI but still within normal limits for age. No APOE4 risk allele is present.  \n\n**Diagnosis:** **CN (Cognitively Normal)**  \n**Confidence:** **Medium** (due to isolated entorhinal atrophy but otherwise normal cognitive and structural findings)",
  "timestamp": "2025-07-26T00:28:48.679759"
}