{
  "ptid_time": "137_S_0443_2008-02-15",
  "img_path": "/data/qiuhui/data/adni/images/137_S_0443/2008-02-15/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 7,765 mm³, 74.1% below the reference mean. With a Z-score of -1.76 (3.9th percentile), this represents moderate atrophy; hippocampal volume measures 7,636 mm³, 4.9% below the reference mean. With a Z-score of -0.49 (31.3th percentile), this represents normal volume ; whole brain volume measures 1,058,620 mm³, 6.7% below the reference mean. With a Z-score of -0.95 (17.2th percentile), this represents normal volume ; entorhinal cortex volume measures 3,386 mm³, 20.6% below the reference mean. With a Z-score of -1.42 (7.7th percentile), this represents mild atrophy; fusiform gyrus volume measures 18,490 mm³, 7.1% below the reference mean. With a Z-score of -0.59 (27.7th percentile), this represents normal volume ; middle temporal gyrus volume measures 23,085 mm³, 3.0% above the reference mean. With a Z-score of 0.25 (59.8th percentile), this represents normal volume . ",
  "text_data": "Age is 64.5 years. Gender is Male. Education: 18 years. MMSE: 30.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The imaging shows moderate ventricular atrophy and mild entorhinal cortex atrophy, but hippocampal and whole brain volumes are within normal ranges. The MMSE score of 30 is intact, and there is no APOE4 risk allele.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to mild-moderate atrophy in some regions but preserved cognition and no genetic risk)",
  "timestamp": "2025-07-26T16:10:23.521657"
}