Iterative reconstruction in single source dual-energy CT pulmonary angiography: is it sufficient to achieve a radiation dose as low as the state-of-the-art single energy CTPA?
Value of monoenergetic low-kV dual energy CT datasets for improved image quality of CT pulmonary angiography. Eur J Radiol 2014: 83:322-328.
In two studies of 25 patients with PE and 14 patients with massive PE, Contractor et al and Lim et al found that signs of RV strain at
CT pulmonary angiography (RV/LV diameter ratiogreater than 1, leftward septal bowing) had a sensitivity of 78%-92%, specificity of 100%, and positive predictive value of 100% when compared to echocardiographic findings for the detection of RV dysfunction similarly other studies have estimated that an RV/LV diameter ratio superior to 1.5 indicates severe PE 11,12,13,16 .
Multidetector row
CT pulmonary angiography and indirect venography for the diagnosis of venous thromboembolic disease in intensive care unit patients.
A dose of at least 2.0 rads per breast is typically delivered during
CT pulmonary angiography. This is equivalent to 100-400 chest radiographs or 10-25 two-view mammograms.
CT pulmonary angiography is the noninvasive imaging examination of choice for suspected PE in most situations.
Does addition of CT pelvic venography to
CT pulmonary angiography protocols contribute to the diagnosis of pulmonary thromboembolic disease?
High pitch, low voltage dual source
CT pulmonary angiography: assessment of image quality and diagnostic acceptability with hybrid iterative reconstruction.
"We need a better test," and
CT pulmonary angiography is emerging as the front runner.
Combining CTV with
CT pulmonary angiography (CTPA) not only increases the confidence in withholding treatment when results for both the pulmonary arteries and leg veins are negative but also increases the diagnosis of venous thromboembolism by 25% over CTPA alone.
Studies that compared single-detector spiral
CT pulmonary angiography with V/Q scanning showed that CT was a more accurate examination with higher specificity, particularly in those patients with underlying cardiopulmonary disease in whom the vast majority (90% in the PIOPED 1 study) have indeterminate V/Q scan results.
CT pulmonary angiography for the detection of pulmonary embolism: Interobserver agreement between on-call radiology residents and specialists (CTPA interobserver agreement).
