{
  "ptid_time": "012_S_4643_2012-10-16",
  "img_path": "/data/qiuhui/data/adni/images/012_S_4643/2012-10-16/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 30,664 mm³, 37.3% above the reference mean. With a Z-score of 0.93 (82.5th percentile), this represents normal volume ; hippocampal volume measures 7,182 mm³, 6.5% below the reference mean. With a Z-score of -0.73 (23.2th percentile), this represents normal volume ; whole brain volume measures 1,012,860 mm³, 1.6% below the reference mean. With a Z-score of -0.20 (42.2th percentile), this represents normal volume ; entorhinal cortex volume measures 4,540 mm³, 16.6% above the reference mean. With a Z-score of 1.29 (90.1th percentile), this represents mild enlargement; fusiform gyrus volume measures 20,410 mm³, 12.1% above the reference mean. With a Z-score of 1.36 (91.3th percentile), this represents mild enlargement; middle temporal gyrus volume measures 19,444 mm³, 5.2% below the reference mean. With a Z-score of -0.47 (32.1th percentile), this represents normal volume . ",
  "text_data": "Age is 65.6 years. Gender is Female. Education: 16 years. MMSE: 30.0. MoCA: 30.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measurements are largely within normal ranges, with only mild deviations (e.g., slightly reduced hippocampal volume but still within normal Z-score range). Cognitive scores (MMSE, MoCA) are perfect, 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": "2025-07-25T23:15:13.463935"
}