{
  "ptid_time": "009_S_4388_2016-02-23",
  "img_path": "/data/qiuhui/data/adni/images/009_S_4388/2016-02-23/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 48,609 mm³, 26.2% above the reference mean. With a Z-score of 0.63 (73.5th percentile), this represents normal volume ; hippocampal volume measures 7,927 mm³, 4.9% above the reference mean. With a Z-score of 0.47 (68.3th percentile), this represents normal volume ; whole brain volume measures 1,135,240 mm³, 5.2% above the reference mean. With a Z-score of 0.67 (74.9th percentile), this represents normal volume ; entorhinal cortex volume measures 4,281 mm³, 4.4% above the reference mean. With a Z-score of 0.30 (61.7th percentile), this represents normal volume ; fusiform gyrus volume measures 17,692 mm³, 6.1% below the reference mean. With a Z-score of -0.52 (30.2th percentile), this represents normal volume ; middle temporal gyrus volume measures 22,452 mm³, 5.2% above the reference mean. With a Z-score of 0.47 (68.0th percentile), this represents normal volume . ",
  "text_data": "Age is 70.8 years. Gender is Male. Education: 18 years. MMSE: 29.0. MoCA: 28.0. Logical Memory: 20.0. APOEε4 alleles: 2.0. Biomarker levels: Florbetapir (AV45): 1.01 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** All brain volumes (hippocampal, whole brain, entorhinal cortex, fusiform gyrus, middle temporal gyrus) are within normal ranges based on Z-scores and percentiles. Cognitive scores (MMSE 29, MoCA 28) are intact, and amyloid PET (AV45) is normal. The presence of two APOE4 alleles increases genetic risk but does not currently indicate pathology.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-25T22:20:56.585901"
}