{
  "ptid_time": "041_S_6401_2018-06-12",
  "img_path": "/data/qiuhui/data/adni/images/041_S_6401/2018-06-12/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 30,625 mm³, 20.5% below the reference mean. With a Z-score of -0.49 (31.2th percentile), this represents normal volume ; hippocampal volume measures 8,292 mm³, 9.7% above the reference mean. With a Z-score of 0.95 (82.8th percentile), this represents normal volume ; whole brain volume measures 1,143,070 mm³, 5.9% above the reference mean. With a Z-score of 0.77 (77.8th percentile), this represents normal volume ; entorhinal cortex volume measures 3,946 mm³, 3.8% below the reference mean. With a Z-score of -0.26 (39.9th percentile), this represents normal volume ; fusiform gyrus volume measures 18,040 mm³, 4.2% below the reference mean. With a Z-score of -0.36 (35.9th percentile), this represents normal volume ; middle temporal gyrus volume measures 20,698 mm³, 3.0% below the reference mean. With a Z-score of -0.27 (39.4th percentile), this represents normal volume . ",
  "text_data": "Age is 75.7 years. Gender is Male. Education: 18 years. Handedness: Right. Race: White. MMSE: 30.0. MoCA: 27.0. Logical Memory: 13.0. APOEε4 alleles: 1.0. Biomarker levels: Florbetapir (AV45): 1.16 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** All brain volume measures (ventricular, hippocampal, whole brain, entorhinal cortex, fusiform gyrus, and middle temporal gyrus) fall within normal ranges based on Z-scores and percentiles. Cognitive scores (MMSE 30, MoCA 27) are within normal limits, and amyloid PET (AV45) is normal. APOE4 heterozygous status does not override the absence of structural or biomarker abnormalities.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T07:30:00.064263"
}