{
  "ptid_time": "021_S_0159_2006-09-08",
  "img_path": "/data/qiuhui/data/adni/images/021_S_0159/2006-09-08/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 22,262 mm³, 20.7% below the reference mean. With a Z-score of -0.47 (31.8th percentile), this represents normal volume ; hippocampal volume measures 6,434 mm³, 9.6% below the reference mean. With a Z-score of -0.88 (19.0th percentile), this represents normal volume ; whole brain volume measures 886,097 mm³, 9.1% below the reference mean. With a Z-score of -1.14 (12.6th percentile), this represents mild atrophy; entorhinal cortex volume measures 3,178 mm³, 13.5% below the reference mean. With a Z-score of -0.83 (20.4th percentile), this represents normal volume ; fusiform gyrus volume measures 13,752 mm³, 19.2% below the reference mean. With a Z-score of -1.74 (4.1th percentile), this represents moderate atrophy; middle temporal gyrus volume measures 16,532 mm³, 13.8% below the reference mean. With a Z-score of -1.19 (11.6th percentile), this represents mild atrophy. ",
  "text_data": "Age is 78.4 years. Gender is Female. Education: 17 years. MMSE: 30.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain imaging shows mild to moderate atrophy in the whole brain, fusiform gyrus, and middle temporal gyrus, but hippocampal and entorhinal cortex volumes are within normal ranges. The MMSE score of 30 is intact, and there is no APOE4 risk allele.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to some atrophy but no cognitive impairment or strong genetic risk)",
  "timestamp": "2025-07-26T01:21:08.799545"
}