I review the observational evidence for spiral structure in the accretion discs of cataclysmic variables (CVs). Doppler tomography is ideally suited to resolve and map such co-rotating patterns and allows a straightforward comparison with theory. The dwarf nova IP Pegasi presents the best studied case, carrying two spiral arms in a wide range of emission lines throughout its outbursts. Both arm...

Computed Tomography (CT) with three-dimensional reconstructions was studied in cranio-facial deformities. The pre-operative and follow-up study of cranio-facial deformities can be performed with spiral CT. With this modality quantitative information can be provided in order to measure the entity of airway obstruction and the result of procedure affecting bone structures.

One strategy was compression ultrasonography, followed by anticoagulation in case of positive results (high probability ventilation-perfusion (VQ) scans) or by VQ scan or spiral computed tomography (CT) in case of negative results. Low probability VQ scans resulted in no treatment, whereas high probability VQ scans resulted in anticoagulation. Intermediate tests were followed by a second test (...

Postoperative hypoxemia can be a challenging diagnostic and management dilemma for the clinician. We present here a case of postoperative hypoxemia following laparoscopic gastric bypass surgery secondary to presumed pulmonary embolism complicated with a patent foramen ovale. The diagnostic pitfalls associated with a negative spiral computed tomography scan and the impact of coexisting medical c...

We read with interest the article by Dr Chang and colleagues 1 in CHEST (January 2013) about the management of ground-glass opacities (GGOs). Their data indicate that the strategy of longterm follow-up and selective surgery was appropriate. However, we do not entirely agree with their ideas. We offer a third choice of CT scan-guided biopsy to solve the long-standing issue. Previous studies have...

A 3π algorithm is obtained in which all the derivatives are confined to a detector array. Distance weighting of backprojection coefficients of the algorithm is studied. A numerical experiment indicates that avoiding differentiation along the source trajectory improves spatial resolution. Another numerical experiment shows that the terms depending on the non-standard distance weighting 1/|x − y(...

One strategy was compression ultrasonography, followed by anticoagulation in case of positive results (high probability ventilation-perfusion (VQ) scans) or by VQ scan or spiral computed tomography (CT) in case of negative results. Low probability VQ scans resulted in no treatment, whereas high probability VQ scans resulted in anticoagulation. Intermediate tests were followed by a second test (...

Until recently, conventional magnetic resonance (MR) imaging of the pancreas was limited by motion artifacts (respiratory, vascular, and bowel peristaltic) and poor spatial resolution. Recent technique innovations in MR imaging hardware and software (fast imaging) have allowed these problems to be overcome with acquisition images similar to those obtained with spiral computed tomography (CT) (F...

flutamide is a non-steroidal antiandrogen commonly used in the treatment of prostate cancer. severe hepatotoxicity occurs in few patients, yet may be fatal. to date, none of the reported cases of flutamide hepatotoxicity has demonstrated thrombocytopenia and chronic liver disease. we report the case of a 55-year-old male with prostatic adenocarcinoma who developed liver failure after six months...