Brain – Subdural Hematoma A subdural hematoma is seen in this 80-year-old male patient. Courtesy Sunshine Coast Radiology, Australia View Scan Parameters Scan Mode Ultra Helical Collimation 0.5 mm x 40 kVp 120 mAs SUREExposure Rotation Time 0.75s Scan Range 177mm Dose Reduction AIDR3D CTDIvol 45.3mGy DLP 872.4mGy.cm Effective Dose 1.8mSv k-factor 0.0021 ×