Article Figures & Data
Figures
- Fig 1.
Cerebral blood flow map demonstrates placement of the standard region-of-interest (ROI) sampling global cortical perfusion with ROI in the bilateral anterior, middle, and posterior cerebral artery territories.
Tables
Skill level Experience at Position (Years) Experience Processing CTP (Years) Junior CT technologist 3 0 Senior CT technologist 23 0 Radiology resident physician 3 0 Neuroradiology fellow 1* 0.5 Neurology attending physician 4 0 Neuroradiology attending physician 2 3† * Additional 4 years of residency training in radiology.
† 1 year of experience processing CT perfusion data during fellowship training.
Observer 1 Observer 2 Observer 3 Observer 4 Observer 5 Observer 2 0.76 Observer 3 0.67 0.69 Observer 4 0.86 0.64 0.55 Observer 5 0.87 0.64 0.57 0.74 Observer 6 1.0 0.87 0.66 0.86 0.86 Note:—Observer 1, radiology resident physician; observer 2, neuroradiology attending physician; observer 3, neurology attending physician; observer 4, neuroradiology fellow; observer 5, junior CT technologist; observer 6, senior CT technologist.
Observer 1 Observer 2 Observer 4 Observer 5 Observer 6 CBF (mL/100 g/min) 13.38 14.55 25.96 20.87 18.85 CBV (mL/100 g) 1.40 1.44 1.90 1.78 1.59 MTT (seconds) 10.65 10.83 10.11 9.65 10.08 Note:—CBF indicates cerebral blood flow; CBV, cerebral blood volume; MTT, mean transit time. Observer 1, radiology resident physician; observer 2, neuroradiology attending physician; observer 4, neuroradiology fellow; observer 5, junior CT technologist; observer 6, senior CT technologist. Observer 3, the neurology attending physician did not participate in this section of the study.
Ischemia/Infarct Global Cortical Perfusion CBF (mL/100 g/min) 27.10 11.88 CBV (mL/100 g) 13.33 13.66 MTT (seconds) 4.66 3.55 Note:—CBF indicates cerebral blood flow; CBV, cerebral blood volume; MTT, mean transit time.
Observer 1 Observer 2 Observer 3 Observer 4 Observer 5 Observer 6 CBF (mL/100 g/min) 42.60 36.52 41.44 46.85 51.53 41.58 CBV (mL/100 g) 2.04 1.98 2.13 2.24 2.78 2.01 MTT (seconds) 5.39 5.87 5.35 5.39 5.59 5.50 Note:—CBF indicates cerebral blood flow; CBV, cerebral blood volume; MTT, mean transit time. Observer 1, radiology resident physician; observer 2, neuroradiology attending physician; observer 3, neurology attending physician; observer 4, neuroradiology fellow; observer 5, junior CT technologist; observer 6, senior CT technologist.
Observer 1 Observer 2 Observer 3 Observer 4 Observer 5 Observer 6 CBF (mL/100 g/min) 2.56 0.35 6.60 0.60 2.17 2.34 CBV (mL/100 g) 1.31 0.33 1.86 8.38 3.87 2.19 MTT (seconds) 1.14 2.29 —* 5.77 3.78 1.52 Note:—CBF indicates cerebral blood flow; CBV, cerebral blood volume; MTT, mean transit time. Observer 1, radiology resident physician; observer 2, neuroradiology attending physician; observer 3, neurology attending physician; observer 4, neuroradiology fellow; observer 5, junior CT technologist; observer 6, senior CT technologist.
* Observer 3 had missing data for the MTT quantitative measurements on the repeated 10 CT perfusion datasets.
