{
  "ptid_time": "021_S_5177_2017-06-27",
  "img_path": "/data/qiuhui/data/adni/images/021_S_5177/2017-06-27/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 28,191 mm³, 0.4% above the reference mean. With a Z-score of 0.01 (50.4th percentile), this represents normal volume ; hippocampal volume measures 7,693 mm³, 8.1% above the reference mean. With a Z-score of 0.75 (77.2th percentile), this represents normal volume ; whole brain volume measures 979,123 mm³, 0.5% above the reference mean. With a Z-score of 0.06 (52.3th percentile), this represents normal volume ; entorhinal cortex volume measures 3,732 mm³, 1.6% above the reference mean. With a Z-score of 0.10 (53.9th percentile), this represents normal volume ; fusiform gyrus volume measures 17,148 mm³, 0.8% above the reference mean. With a Z-score of 0.07 (52.9th percentile), this represents normal volume ; middle temporal gyrus volume measures 19,462 mm³, 1.5% above the reference mean. With a Z-score of 0.13 (55.3th percentile), this represents normal volume . ",
  "text_data": "Age is 76.5 years. Gender is Female. Education: 18 years. MMSE: 30.0. MoCA: 28.0. Logical Memory: 18.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.26 SUVR (mild elevated). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** All brain volume measures (ventricular, hippocampal, whole brain, entorhinal cortex, fusiform gyrus, and middle temporal gyrus) are within normal ranges, with Z-scores close to or slightly above the mean. Cognitive scores (MMSE 30, MoCA 28) are intact, and APOE4 is negative. The mild AV45 elevation suggests some amyloid deposition but is not strongly indicative of neurodegeneration given the preserved brain structure and cognition.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to mild AV45 elevation, though structural and cognitive measures are normal)",
  "timestamp": "2025-07-26T01:54:03.372029"
}