"Contraindications "
"80 - 100 HU"
"50 - 60 mL of non-ionic contrast with a 50 mL saline chaser at 4.5/5 mL/s"
"50 - 60 mL of non-ionic contrast with a 50 mL saline chaser at 4.5/5 mL/s"
"bolus tracking: sequential axial slices at a set region of interest are conducted during the contrast injection until a threshold enhancement is met, triggering a diagnostic scan 1"
"respiration phase"
"gentle inspiration "
"respiration phase"
"gentle inspiration "
"gentle inspiration "
"NB: This article is intended to outline some general principles of protocol design. The specifics will vary depending on CT hardware and software, radiologists' and referrers' preferences, institutional protocols, patient factors (e.g. allergy) and time constraints. "
"NB: This article is intended to outline some general principles of protocol design. The specifics will vary depending on CT hardware and software, radiologists' and referrers' preferences, institutional protocols, patient factors (e.g. allergy) and time constraints."
"below the carina at the level of the pulmonary trunk with an ROI on the pulmonary artery"
"below the carina at the level of the pulmonary trunk with an ROI on the pulmonary artery"
"measurement should be performed with a round ROI covering at least 50% of the main pulmonary artery lumen 9"
"changing the scan direction to caudocranial has been shown to better demonstrate the lower lobes whilst alleviating artifact from the contrast bolus in the SVC 1"
Expected headings
"Purpose"
"Contraindications "
"Bolus tracking"
"Test bolus"
"There are two principal approaches for performing a CTPA of high diagnostic quality:"
"as the time-enhancement curve will only begin recording after the scan delay; a widely accepted formula for calculating the scan delay is 1"