BACKGROUND Our goal was to evaluate computed tomographic (CT) scans of the chest as a means of stratifying smoke inhalation injury (SII) severity. METHODS Twenty anesthetized sheep underwent graded SII: group I, no smoke; group II, 5 smoke units; group III, 10 units; and group IV, 16 units. CT scans were obtained at 6, 12, and 24 hours after injury. Each quadrant of each slice was scored subj...

The study was to explore the feasibility of improving cone-beam CT (CBCT) number (corresponding to the Hounsfield units in computed tomography) consistency using a scatter-correction algorithm, with the aim of using CBCT images for treatment planning with density correction. A scatter correction algorithm was applied to a Varian OBI CBCT and an Elekta XVI CBCT, and was evaluated for improving C...

INSERM UMR 1101, LaTIM, Brest, France Current MR attenuation correction (AC) approaches suffer from the lack of precision in the detection of bone and the assigned attenuation coefficients. In general, no unique transformation of MR image intensities into attenuation coefficients exists. The purpose of this work is to derive attenuation coefficient maps from a single MR sequence through the gen...

A 43 years-old man presented to our stone clinic complaining of back pain for the last 3 months. He had significant past medical history for nephrolithiasis: he had undergone unsuccessful SWL for left renal calculi five years ago and also presented with several episodes of pyelonephritis in the last months, requiring hospitalization for intravenous antibiotics. Initial laboratory work-up reveal...

Adrenal incidentalomas are commonly encountered in this era of ubiquitous imaging. The attenuation of the incidentaloma measured in Hounsfield units (HU) is an important step in the work up. Attenuation less than 10 HU indicates a benign lesion in more than 98% of cases, whereas attenuation greater than 30 HU is highly suspicious for adrenocortical cancer (ACC). Adrenal hematoma is rarely suspe...

Assessing bone density in prospective dental implant sites is crucial both for choosing the type and planning a drilling procedure that will ensure implant’s primary stability osseointegration. This study aimed to investigate possible differences between densities of various edentulous maxilla mandible. The was conducted on group forty partly patients who underwent radiological examination by s...

Among the population over the age of 65 years joint diseases constitute more than 50% of chronic diseases and most often apply to the hip. Endoprosthetics is one of the methods for treating this condition and is considered one of the best--clinically and economically--interventions of the modern medicine. However, it is not free of complications among which the loosening of the endoprosthesis i...

Myxoid adrenocortical neoplasms are rare; to our knowledge, only 56 cases have been reported in the literature. Therefore, distinguishing benign from malignant cases is challenging. Although the histopathological features of myxoid adrenocortical neoplasia have been amply demonstrated, their imaging characteristics are yet to be reported. We describe here these characteristics for such a neopla...

Transbronchial fine needle aspiration (TBFNA) was used to confirm the diagnosis of bronchogenic cyst in two asymptomatic patients with mediastinal masses who declined surgical exploration. Both masses were located subcarinally but differed in computed tomographic density (7 and 59 Hounsfield units). Aspirate cytology demonstrated predominately bronchial columnar epithelial cells in mucus, witho...

Using ultrafast computed tomography, we have developed a technique for measuring local ventilation in a volume of 1 cm3 in the normal supine lung. The technique employs the inert gas xenon in its nonradioactive form and makes use of its radiopaque properties. The inhalation of xenon results in changes in density which can be detected and measured in Hounsfield units using ultrafast computed tom...