They found systemic collaterals in 13 patients that would otherwise have been missed on noncontrast CT. The role of contrast-enhanced CT scan after PAVM embolization is unclear. Cross-sectional anatomy displayed on CT chest with IV contrast is useful in further treatment planning if new or recanalized PAVMs are detected [10,27]. CTA Chest With IV Contrast CTA also provides similar diagnostic accuracy as noncontrast CT due to the high natural contrast inherent to pulmonary anatomy. Contrast administration adds a small risk of air embolism in patients with PAVM. Adequate precaution should be taken to prevent air embolism. CTA may help identify systemic supply to large PAVMs via the systemic arteries [10,29,30]. Artifacts from the embolic material limit the usefulness of contrast enhancement as a tool to evaluate the reperfusion [47]. The role of contrast-enhanced CT has been studied after embolotherapy for PAVM in the context of detecting systemic collaterals by Brillet et al [29] in 32 patients. They found systemic collaterals in 13 patients that would otherwise have been missed on noncontrast CT. Another study by Remy-Jardin et at [30] showed that long-term CTA follow-up of initially successfully treated PAVMs revealed successful embolotherapy of 75% and partially or completely failed embolotherapy of 25% of PAVMs. Cross-sectional anatomy displayed on CT chest with IV contrast is useful in further treatment planning if new or recanalized PAVMs are detected [10,27]. CTA Pulmonary Arteries With IV Contrast CTPA specifically assesses the pulmonary vasculature. IV contrast is timed for optimum evaluation of the pulmonary arteries. Although, there is limited literature specific to CTA of pulmonary arteries for evaluation of PAVM. This protocol is used in clinical practice when considering contrast-enhanced CT scan for evaluating PAVM. Like other CT techniques, CTPA offers high special resolution and can detect the number, size, and distribution of PAVMs accurately.
Pulmonary Arteriovenous Malformation PAVM . They found systemic collaterals in 13 patients that would otherwise have been missed on noncontrast CT. The role of contrast-enhanced CT scan after PAVM embolization is unclear. Cross-sectional anatomy displayed on CT chest with IV contrast is useful in further treatment planning if new or recanalized PAVMs are detected [10,27]. CTA Chest With IV Contrast CTA also provides similar diagnostic accuracy as noncontrast CT due to the high natural contrast inherent to pulmonary anatomy. Contrast administration adds a small risk of air embolism in patients with PAVM. Adequate precaution should be taken to prevent air embolism. CTA may help identify systemic supply to large PAVMs via the systemic arteries [10,29,30]. Artifacts from the embolic material limit the usefulness of contrast enhancement as a tool to evaluate the reperfusion [47]. The role of contrast-enhanced CT has been studied after embolotherapy for PAVM in the context of detecting systemic collaterals by Brillet et al [29] in 32 patients. They found systemic collaterals in 13 patients that would otherwise have been missed on noncontrast CT. Another study by Remy-Jardin et at [30] showed that long-term CTA follow-up of initially successfully treated PAVMs revealed successful embolotherapy of 75% and partially or completely failed embolotherapy of 25% of PAVMs. Cross-sectional anatomy displayed on CT chest with IV contrast is useful in further treatment planning if new or recanalized PAVMs are detected [10,27]. CTA Pulmonary Arteries With IV Contrast CTPA specifically assesses the pulmonary vasculature. IV contrast is timed for optimum evaluation of the pulmonary arteries. Although, there is limited literature specific to CTA of pulmonary arteries for evaluation of PAVM. This protocol is used in clinical practice when considering contrast-enhanced CT scan for evaluating PAVM. Like other CT techniques, CTPA offers high special resolution and can detect the number, size, and distribution of PAVMs accurately.