{
  "ptid_time": "006_S_4449_2013-03-12",
  "img_path": "/data/qiuhui/data/adni/images/006_S_4449/2013-03-12/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 31,997 mm³, 43.2% above the reference mean. With a Z-score of 1.08 (86.0th percentile), this represents mild enlargement; hippocampal volume measures 8,788 mm³, 14.4% above the reference mean. With a Z-score of 1.61 (94.6th percentile), this represents moderate enlargement; whole brain volume measures 1,218,270 mm³, 18.4% above the reference mean. With a Z-score of 2.29 (98.9th percentile), this represents significant enlargement; entorhinal cortex volume measures 3,713 mm³, 4.6% below the reference mean. With a Z-score of -0.36 (36.0th percentile), this represents normal volume ; fusiform gyrus volume measures 17,952 mm³, 1.4% below the reference mean. With a Z-score of -0.16 (43.7th percentile), this represents normal volume ; middle temporal gyrus volume measures 20,955 mm³, 2.1% above the reference mean. With a Z-score of 0.19 (57.5th percentile), this represents normal volume . ",
  "text_data": "Age is 67.9 years. Gender is Female. Education: 12 years. MMSE: 29.0. MoCA: 28.0. Logical Memory: 11.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume data shows mild to significant enlargement in most regions (ventricular, hippocampal, whole brain), with only the entorhinal cortex and fusiform gyrus slightly below or near the reference mean. Cognitive scores (MMSE 29, MoCA 28) are within normal ranges, and the absence of APOE4 reduces genetic risk. No significant atrophy or cognitive impairment is evident.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-25T21:38:21.851533"
}