{
  "ptid_time": "023_S_4115_2016-02-19",
  "img_path": "/data/qiuhui/data/adni/images/023_S_4115/2016-02-19/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 30,258 mm³, 21.4% below the reference mean. With a Z-score of -0.51 (30.4th percentile), this represents normal volume ; hippocampal volume measures 8,404 mm³, 11.2% above the reference mean. With a Z-score of 1.09 (86.2th percentile), this represents mild enlargement; whole brain volume measures 1,110,990 mm³, 2.9% above the reference mean. With a Z-score of 0.38 (64.8th percentile), this represents normal volume ; entorhinal cortex volume measures 5,137 mm³, 25.3% above the reference mean. With a Z-score of 1.71 (95.7th percentile), this represents moderate enlargement; fusiform gyrus volume measures 19,672 mm³, 4.4% above the reference mean. With a Z-score of 0.38 (64.7th percentile), this represents normal volume ; middle temporal gyrus volume measures 22,249 mm³, 4.3% above the reference mean. With a Z-score of 0.38 (64.9th percentile), this represents normal volume . ",
  "text_data": "Age is 71.4 years. Gender is Male. Education: 18 years. MMSE: 30.0. MoCA: 26.0. Logical Memory: 5.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 0.99 SUVR (normal ); Amyloid beta: 1568.00 pg/mL (mild elevated); Total tau: 255.50 pg/mL (normal ); Phosphorylated tau: 22.80 pg/mL (normal ). ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measurements show normal or above-average volumes in key regions (hippocampus, entorhinal cortex), with no significant atrophy. Cognitive scores (MMSE 30, MoCA 26) are within normal ranges, and biomarkers (Aβ mildly elevated but T-tau/P-tau normal, AV45 normal) do not strongly support Alzheimer’s pathology.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to mildly elevated Aβ, but other markers and imaging are reassuring)",
  "timestamp": "2025-07-26T03:02:26.874193"
}