Illustration 4: Maximum patient diameter guide for low kV selection (1) and Lateral Patient
3.5.3 Center the patient properly when using SmartmA
Properly center the patient. This is critical with SmartmA.
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Double check and verify the table height is centered to the patient.
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Raise or lower the table as needed before taking the scouts.
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After the scouts are taken and prescription is done, verify the mA table calculations before
confirming the scan.
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Make sure minimum mA and maximum mA values are set appropriately.
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Set the mA procedure in the Scan chapter.
See
3.5.4 Increase the pitch
Increase the pitch.
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Increasing the pitch decreases the amount of radiation needed to cover the region indicated,
usually without compromising the diagnostic quality of the scan.
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Increasing pitch from 1.0 to 1.375:1 decreases dose by a factor of about 27%.
3.5.5 Use Small SFOV Filters
Use the smallest SFOV whenever possible, depending on the exam and size of the patient.
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Matching the appropriate SFOV bowtie filter to the size of the patient ensures the dose is
delivered where it is needed, and filtered where it is not needed.
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Small SFOV supports DFOVs up to 32 cm in diameter.
Chapter 5 Pediatrics and Small Patients
Diameter in cm (2)
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