{
  "ptid_time": "941_S_6581_2018-09-12",
  "img_path": "/data/qiuhui/data/adni/images/941_S_6581/2018-09-12/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 61,263 mm³, 118.3% above the reference mean. With a Z-score of 2.71 (99.7th percentile), this represents significant enlargement; hippocampal volume measures 8,346 mm³, 17.3% above the reference mean. With a Z-score of 1.59 (94.4th percentile), this represents moderate enlargement; whole brain volume measures 1,203,690 mm³, 23.5% above the reference mean. With a Z-score of 2.96 (99.8th percentile), this represents significant enlargement; entorhinal cortex volume measures 3,457 mm³, 5.9% below the reference mean. With a Z-score of -0.36 (35.9th percentile), this represents normal volume ; fusiform gyrus volume measures 20,879 mm³, 22.7% above the reference mean. With a Z-score of 2.07 (98.1th percentile), this represents significant enlargement; middle temporal gyrus volume measures 23,223 mm³, 21.1% above the reference mean. With a Z-score of 1.84 (96.7th percentile), this represents moderate enlargement. ",
  "text_data": "Age is 74.4 years. Gender is Female. Education: 16 years. Handedness: Right. Race: White. MMSE: 30.0. MoCA: 28.0. Logical Memory: 13.0. APOEε4 alleles: 0.0. Biomarker levels: Flobetaben (FBB): 1.09 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The imaging data shows significant ventricular enlargement (consistent with atrophy) and mixed findings in other regions (e.g., hippocampal enlargement, which is atypical for Alzheimer's). However, cognitive scores (MMSE 30, MoCA 28) are intact, and there is no APOE4 risk allele. The entorhinal cortex, a key region in early Alzheimer's, is normal.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to conflicting imaging findings despite normal cognition)",
  "timestamp": "2025-07-26T17:50:36.460125"
}