{
  "ptid_time": "019_S_5242_2013-07-02",
  "img_path": "/data/qiuhui/data/adni/images/019_S_5242/2013-07-02/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 16,393 mm³, 45.4% below the reference mean. With a Z-score of -1.08 (14.0th percentile), this represents mild atrophy; hippocampal volume measures 8,934 mm³, 11.3% above the reference mean. With a Z-score of 1.13 (87.1th percentile), this represents mild enlargement; whole brain volume measures 1,179,490 mm³, 4.0% above the reference mean. With a Z-score of 0.56 (71.3th percentile), this represents normal volume ; entorhinal cortex volume measures 4,138 mm³, 2.9% below the reference mean. With a Z-score of -0.20 (42.0th percentile), this represents normal volume ; fusiform gyrus volume measures 18,353 mm³, 7.8% below the reference mean. With a Z-score of -0.65 (25.8th percentile), this represents normal volume ; middle temporal gyrus volume measures 24,591 mm³, 9.7% above the reference mean. With a Z-score of 0.80 (78.8th percentile), this represents normal volume . ",
  "text_data": "Age is 67.2 years. Gender is Male. Education: 20 years. Handedness: Right. Race: White. Medical history: Psychiatric; Neurologic; Head, Eyes, Ears, Nose and Throat; Musculoskeletal; Endocrine-Metabolic; Renal-Genitourinary; Allergies or Drug Sensitivities; Major Surgical Procedures. MMSE: 29.0. MoCA: 28.0. Logical Memory: 17.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 0.91 SUVR (mild reduced); Amyloid beta: 1306.00 pg/mL (normal ); Total tau: 302.50 pg/mL (normal ); Phosphorylated tau: 27.06 pg/mL (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain imaging shows mild ventricular atrophy but otherwise normal or even slightly enlarged volumes in key regions (hippocampus, whole brain). Cognitive scores (MMSE 29, MoCA 28) are intact, and biomarkers (Aβ, tau, AV45) are normal or only mildly reduced, with no APOE4 risk allele.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High  \n\n*(Note: Mild ventricular atrophy can occur with aging and does not necessarily indicate pathology given the absence of cognitive decline or biomarker abnormalities.)*",
  "timestamp": "2025-07-26T01:09:46.255783"
}