{
  "ptid_time": "041_S_5082_2013-09-04",
  "img_path": "/data/qiuhui/data/adni/images/041_S_5082/2013-09-04/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 33,467 mm³, 11.5% above the reference mean. With a Z-score of 0.27 (60.7th percentile), this represents normal volume ; hippocampal volume measures 7,849 mm³, 2.2% below the reference mean. With a Z-score of -0.22 (41.2th percentile), this represents normal volume ; whole brain volume measures 1,063,930 mm³, 6.2% below the reference mean. With a Z-score of -0.88 (18.9th percentile), this represents normal volume ; entorhinal cortex volume measures 3,989 mm³, 6.4% below the reference mean. With a Z-score of -0.44 (32.8th percentile), this represents normal volume ; fusiform gyrus volume measures 20,524 mm³, 3.1% above the reference mean. With a Z-score of 0.26 (60.1th percentile), this represents normal volume ; middle temporal gyrus volume measures 26,274 mm³, 17.2% above the reference mean. With a Z-score of 1.42 (92.2th percentile), this represents mild enlargement. ",
  "text_data": "Age is 69.7 years. Gender is Male. Education: 16 years. MMSE: 28.0. MoCA: 28.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** All brain volumes (ventricular, hippocampal, whole brain, entorhinal cortex, fusiform gyrus) fall within normal ranges (Z-scores between -0.88 and 1.42, percentiles 18.9–92.2). Cognitive scores (MMSE 28, MoCA 28) are intact, and there is no APOE4 risk allele. No significant atrophy or biomarker abnormalities suggest cognitive impairment.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T07:24:40.103401"
}