{
  "ptid_time": "002_S_4229_2017-09-20",
  "img_path": "/data/qiuhui/data/adni/images/002_S_4229/2017-09-20/t1.nii.gz",
  "img_finding": "Image findings: hippocampal volume measures 6,756 mm³, 10.6% below the reference mean. With a Z-score of -1.04 (15.0th percentile), this represents mild atrophy; whole brain volume measures 1,030,660 mm³, 4.5% below the reference mean. With a Z-score of -0.59 (27.9th percentile), this represents normal volume ; entorhinal cortex volume measures 3,942 mm³, 3.9% below the reference mean. With a Z-score of -0.26 (39.7th percentile), this represents normal volume ; fusiform gyrus volume measures 17,390 mm³, 7.7% below the reference mean. With a Z-score of -0.65 (25.6th percentile), this represents normal volume ; middle temporal gyrus volume measures 21,030 mm³, 1.4% below the reference mean. With a Z-score of -0.13 (44.8th percentile), this represents normal volume . ",
  "text_data": "Age is 72.4 years. Gender is Male. Education: 15 years. MMSE: 27.0. MoCA: 23.0. Logical Memory: 7.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 0.98 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The hippocampal volume shows mild atrophy (Z-score -1.04, 15th percentile), while other brain regions (whole brain, entorhinal cortex, fusiform gyrus, middle temporal gyrus) are within normal ranges. Cognitive testing (MMSE 27, MoCA 23) suggests mild cognitive impairment, but no significant amyloid pathology (AV45 normal) or genetic risk (APOE4 negative).  \n\n**Diagnosis:** **Mild Cognitive Impairment (MCI)**  \n**Confidence:** **Medium** (due to hippocampal atrophy and borderline MoCA, but lack of amyloid burden or widespread atrophy lowers certainty for progression to dementia).",
  "timestamp": "2025-07-25T20:24:01.813755"
}