{
  "ptid_time": "031_S_4032_2011-12-05",
  "img_path": "/data/qiuhui/data/adni/images/031_S_4032/2011-12-05/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 15,039 mm³, 46.4% below the reference mean. With a Z-score of -1.06 (14.4th percentile), this represents mild atrophy; hippocampal volume measures 7,032 mm³, 1.2% below the reference mean. With a Z-score of -0.11 (45.8th percentile), this represents normal volume ; whole brain volume measures 908,059 mm³, 6.8% below the reference mean. With a Z-score of -0.86 (19.5th percentile), this represents normal volume ; entorhinal cortex volume measures 3,137 mm³, 14.6% below the reference mean. With a Z-score of -0.90 (18.5th percentile), this represents normal volume ; fusiform gyrus volume measures 15,539 mm³, 8.7% below the reference mean. With a Z-score of -0.79 (21.5th percentile), this represents normal volume ; middle temporal gyrus volume measures 18,394 mm³, 4.0% below the reference mean. With a Z-score of -0.35 (36.3th percentile), this represents normal volume . ",
  "text_data": "Age is 70.7 years. Gender is Female. Education: 14 years. MMSE: 29.0. MoCA: 27.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain imaging shows mild ventricular enlargement but otherwise normal volumes in key regions (hippocampus, entorhinal cortex, fusiform gyrus, etc.). Cognitive scores (MMSE 29, MoCA 27) are within normal limits, and there is no APOE4 genetic risk factor.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T04:45:55.231803"
}