{
  "ptid_time": "021_S_4276_2013-10-22",
  "img_path": "/data/qiuhui/data/adni/images/021_S_4276/2013-10-22/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 28,854 mm³, 2.8% above the reference mean. With a Z-score of 0.06 (52.6th percentile), this represents normal volume ; hippocampal volume measures 6,812 mm³, 4.3% below the reference mean. With a Z-score of -0.39 (34.8th percentile), this represents normal volume ; whole brain volume measures 1,016,860 mm³, 4.3% above the reference mean. With a Z-score of 0.55 (70.7th percentile), this represents normal volume ; entorhinal cortex volume measures 3,247 mm³, 11.6% below the reference mean. With a Z-score of -0.71 (23.8th percentile), this represents normal volume ; fusiform gyrus volume measures 18,191 mm³, 6.9% above the reference mean. With a Z-score of 0.63 (73.6th percentile), this represents normal volume ; middle temporal gyrus volume measures 17,881 mm³, 6.7% below the reference mean. With a Z-score of -0.58 (28.0th percentile), this represents normal volume . ",
  "text_data": "Age is 75.9 years. Gender is Female. Education: 12 years. MMSE: 30.0. MoCA: 29.0. Logical Memory: 20.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "Reasoning: All brain volume measures fall within the normal range (Z-scores between -0.71 and +0.63), with no significant atrophy in Alzheimer's-sensitive regions like the hippocampus or entorhinal cortex. Cognitive scores (MMSE 30, MoCA 29) are intact, and the single APOE4 allele does not outweigh the absence of structural or functional impairment.  \nDiagnosis: CN (Cognitively Normal)  \nConfidence: High",
  "timestamp": "2025-07-26T01:43:31.198394"
}