{
  "ptid_time": "137_S_4632_2012-05-03",
  "img_path": "/data/qiuhui/data/adni/images/137_S_4632/2012-05-03/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 41,312 mm³, 37.6% above the reference mean. With a Z-score of 0.89 (81.4th percentile), this represents normal volume ; hippocampal volume measures 7,738 mm³, 3.6% below the reference mean. With a Z-score of -0.36 (35.9th percentile), this represents normal volume ; whole brain volume measures 1,164,590 mm³, 2.6% above the reference mean. With a Z-score of 0.37 (64.6th percentile), this represents normal volume ; entorhinal cortex volume measures 4,579 mm³, 7.4% above the reference mean. With a Z-score of 0.51 (69.6th percentile), this represents normal volume ; fusiform gyrus volume measures 20,280 mm³, 1.9% above the reference mean. With a Z-score of 0.15 (56.2th percentile), this represents normal volume ; middle temporal gyrus volume measures 22,836 mm³, 1.9% above the reference mean. With a Z-score of 0.16 (56.2th percentile), this represents normal volume . ",
  "text_data": "Age is 67.7 years. Gender is Male. Education: 18 years. MMSE: 29.0. MoCA: 26.0. Logical Memory: 11.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 0.98 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** All brain volumes (hippocampal, whole brain, entorhinal cortex, fusiform gyrus, and middle temporal gyrus) are within normal ranges, with Z-scores close to the mean. Cognitive scores (MMSE 29, MoCA 26) are also within normal limits, and amyloid PET (AV45) is normal. No significant atrophy or biomarker evidence of Alzheimer’s pathology is present.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T16:40:04.841821"
}