{
  "ptid_time": "128_S_4832_2012-07-09",
  "img_path": "/data/qiuhui/data/adni/images/128_S_4832/2012-07-09/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 37,750 mm³, 25.7% above the reference mean. With a Z-score of 0.61 (72.9th percentile), this represents normal volume ; hippocampal volume measures 7,803 mm³, 2.8% below the reference mean. With a Z-score of -0.28 (39.0th percentile), this represents normal volume ; whole brain volume measures 1,137,440 mm³, 0.3% above the reference mean. With a Z-score of 0.04 (51.4th percentile), this represents normal volume ; entorhinal cortex volume measures 3,627 mm³, 14.9% below the reference mean. With a Z-score of -1.03 (15.1th percentile), this represents mild atrophy; fusiform gyrus volume measures 17,179 mm³, 13.7% below the reference mean. With a Z-score of -1.14 (12.7th percentile), this represents mild atrophy; middle temporal gyrus volume measures 22,982 mm³, 2.5% above the reference mean. With a Z-score of 0.21 (58.3th percentile), this represents normal volume . ",
  "text_data": "Age is 69.7 years. Gender is Male. Education: 16 years. Handedness: Right. Race: Asian. Medical history: Neurologic; Head, Eyes, Ears, Nose and Throat; Endocrine-Metabolic; Gastrointestinal; Hematopoietic-Lymphatic; Allergies or Drug Sensitivities; Smoking. MMSE: 29.0. MoCA: 28.0. Logical Memory: 10.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.04 SUVR (normal ); Amyloid beta: 1236.00 pg/mL (normal ); Total tau: 136.20 pg/mL (mild reduced); Phosphorylated tau: 12.92 pg/mL (mild reduced). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain imaging shows mild atrophy in the entorhinal cortex and fusiform gyrus, which are regions often affected in early Alzheimer's disease. However, cognitive scores (MMSE 29, MoCA 28) are within normal limits, and biomarkers (Aβ normal, AV45 normal) do not support amyloid pathology.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to mild atrophy in key regions but normal cognition and biomarkers)",
  "timestamp": "2025-07-26T14:06:06.761955"
}