{
  "ptid_time": "116_S_4855_2016-12-12",
  "img_path": "/data/qiuhui/data/adni/images/116_S_4855/2016-12-12/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 45,078 mm³, 4.1% below the reference mean. With a Z-score of -0.12 (45.2th percentile), this represents normal volume ; hippocampal volume measures 6,629 mm³, 4.9% below the reference mean. With a Z-score of -0.42 (33.7th percentile), this represents normal volume ; whole brain volume measures 1,019,860 mm³, 0.9% below the reference mean. With a Z-score of -0.12 (45.3th percentile), this represents normal volume ; entorhinal cortex volume measures 3,720 mm³, 6.3% below the reference mean. With a Z-score of -0.41 (34.1th percentile), this represents normal volume ; fusiform gyrus volume measures 17,031 mm³, 5.7% below the reference mean. With a Z-score of -0.50 (31.0th percentile), this represents normal volume ; middle temporal gyrus volume measures 18,332 mm³, 9.1% below the reference mean. With a Z-score of -0.82 (20.7th percentile), this represents normal volume . ",
  "text_data": "Age is 87.8 years. Gender is Male. Education: 14 years. MMSE: 28.0. MoCA: 25.0. Logical Memory: 11.0. APOEε4 alleles: 1.0. Biomarker levels: Florbetapir (AV45): 1.27 SUVR (mild elevated). ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measurements are all within normal ranges (Z-scores between -0.12 and -0.82, percentiles between 20.7 and 45.3), with no significant atrophy. Cognitive scores (MMSE 28, MoCA 25) are within normal limits for age, despite mild AV45 (amyloid) elevation. APOE4 carrier status increases Alzheimer’s risk but does not confirm pathology without clinical impairment.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to mild AV45 elevation and APOE4, but normal cognition and volumes suggest no current impairment)",
  "timestamp": "2025-07-26T12:16:55.129401"
}