Spiral computed tomographic (CT) angiography of the pulmonary circulation has emerged recently as a potential useful diagnostic method for the evaluation of the pulmonary circulation. Sixteen female juvenile pigs (Large White-Landrace Cross) weighing 29 ± 2 kg were studied in the supine position. | Although pulmonary angiography is the "gold standard" for diagnosing pulmonary embolism (PE), this technique carries some risks and is not always. Spherical emboli manufactured from Batson's compound can only approximate the fragmented clot found in clinical pulmonary embolism. However, the accuracy of pulmonary angiography has never been evaluated against an independent gold standard. Semin Vasc Med. The right brachial vein was exposed and an 18-gauge catheter inserted to allow later injection of contrast media during spiral CT. To prevent leakage of urine a Foley catheter (5-Fr) was inserted into the bladder through a small suprapubic incision. These results support the use of spiral CT as a primary diagnostic modality in suspected pulmonary embolism, and as the diagnostic tests of choice when ventilation– perfusion scans are judged to be intermediate probability. The accuracy of the CTA is nearly 100 percent particularly when combined with D-dimer testing. Would you like email updates of new search results? A longer “breath-hold” time was required to acquire the tomographic images (CT3, 22 ± 1.4 s; CT1, 28 ± 2 s) than the angiographic images (< 10 s). We conclude that spiral CT is comparable to angiography for detection of pulmonary … SCTA is based on continuous computed tomography (CT) data acquisition during patient transport through the rotating X‐ray tube and detector system, where … Fraser, R. G., J. In a clinical setting a dyspneic patient may not be able to hold their breath for as long as this, and consequently, the accuracy of spiral CT could be affected. Hence, the aim of our study was a balanced comparison between V/Q lung scintigraphy and CT angiography using advanced imaging techniques for both modalities. Multi-detector row spiral CT pulmonary angiography: comparison with single-detector row spiral CT. Raptopoulos V(1), Boiselle PM. Corrosion casting. Contrast-enhanced spiral CT. Pulmonary angiography is a test to see how blood flows through the lung. The current standard of care for members with suspected pulmonary embolism is a spiral CT scan, also called a CTA, CT PA (computed tomography pulmonary angiography), MDCT (multidector CT) or helical CT scan. In this paper, the technique, the findings and the role of spiral CT angiography in diagnosis of pulmonary embolism are discussed. Spiral CT scan of case 2. The total number of false positive and false negatives for the two readers for each imaging modality is shown in Table 3. The effect of using angiography as the gold standard on the sensitivity, positive predictive value, and number of false positives and negatives is summarized in Tables 4 and 5. Eur Radiol. The images were read in random order. We conclude that spiral CT is comparable to angiography for detection of pulmonary emboli. Within the last several years, spiral computed tomography angiography (SCTA) of the pulmonary arteries has emerged as a noninvasive angiographic modality for the evaluation of patients with suspected pulmonary embolism (PE). The study was approved by the University Animal Experimentation Committee and was carried out according to the Candian guidelines for use and care of animals. Thus, there were 79 emboli available for diagnosis for each of the imaging modalities and these were included in the analysis; these emboli consisted of 15 large, 18 small, and 46 emboli that combined at 21 locations (17 pairs, 4 triplets) (Table 1). 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