{
  "ptid_time": "041_S_4200_2013-10-09",
  "img_path": "/data/qiuhui/data/adni/images/041_S_4200/2013-10-09/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 20,154 mm³, 28.2% below the reference mean. With a Z-score of -0.65 (25.9th percentile), this represents normal volume ; hippocampal volume measures 7,853 mm³, 10.4% above the reference mean. With a Z-score of 0.95 (82.9th percentile), this represents normal volume ; whole brain volume measures 1,076,120 mm³, 10.4% above the reference mean. With a Z-score of 1.31 (90.5th percentile), this represents mild enlargement; entorhinal cortex volume measures 4,326 mm³, 17.8% above the reference mean. With a Z-score of 1.09 (86.2th percentile), this represents mild enlargement; fusiform gyrus volume measures 17,428 mm³, 2.4% above the reference mean. With a Z-score of 0.22 (58.8th percentile), this represents normal volume ; middle temporal gyrus volume measures 23,618 mm³, 23.2% above the reference mean. With a Z-score of 2.01 (97.8th percentile), this represents significant enlargement. ",
  "text_data": "Age is 72.2 years. Gender is Female. Education: 18 years. MMSE: 30.0. MoCA: 26.0. Logical Memory: 19.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.04 SUVR (normal ); Amyloid beta: 1447.00 pg/mL (mild elevated); Total tau: 159.30 pg/mL (mild reduced); Phosphorylated tau: 13.48 pg/mL (mild reduced). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "Reasoning: The brain volume measurements show normal to mildly enlarged structures, with no significant atrophy in key regions like the hippocampus or entorhinal cortex. Cognitive scores (MMSE 30, MoCA 26) are within normal limits, and biomarkers (Aβ mildly elevated, tau reduced) do not strongly support Alzheimer's pathology.  \nDiagnosis: CN (Cognitively Normal)  \nConfidence: Medium (due to mildly elevated Aβ, but overall structural and cognitive findings are reassuring)",
  "timestamp": "2025-07-26T07:14:53.540915"
}