Search results for "Radiograph"
showing 10 items of 830 documents
The determination of the initial straight length in root canals of mandibular premolars--an in vitro study.
2009
Abstract The aim of the present roentgenographic in vitro study was to determine the initial straight length from the cemento-enamel junction (CEJ) to the appearance of a root canal curvature in human mandibular premolars. A total number of 282 mandibular premolars were examined. Exclusion criteria comprised root caries, extensive restorations and endodontically treated teeth. The teeth were fixed and digitally radiographed by means of a specially developed fixation device with standardized and reproducible distances with the parallel technique (Heliodent MD; Merlin 2.1). The distances from the CEJ to the first curvature (> 5°) (distance I), from the first curvature to a second curvature (d…
A solvent-free regioselective iodination route of ortho-carboranes.
2006
Tetraiodo-ortho-carborane based X-ray contrast agents can be readily prepared in a high yield, fast, clean, regioselective fashion by a solvent-free reaction of ortho-carboranes with iodine in sealed tubes.
Alterations of panoramic radiomorphometric indices in children and adolescents with beta-thalassemia major: A fractal analysis study
2021
Background Beta-thalassemia major is an inherited disorder that can cause bone deformity and loss of bone mineral density. The objective of this study is to evaluate the cortical and trabecular mandibular bone morphology of children and adolescents who have beta-thalassemia major (ß-TM) using a fractal dimension (FD) analysis and different panoramic radiomorphometric indices with digital panoramic radiographic images (DPRIs). Material and Methods The study included 80 patients (with 40 patients each of ß-TM and control). The mandibular cortical width (MCW), panoramic mandibular index (PMI), mandibular cortical index (MCI), and simple visual estimation (SVE) were evaluated, and an FD analysi…
Autosomal recessive severe dwarfism in a Sicilian girl: a new form of osteodysplastic primordial dwarfism?
1996
A new type of osteodysplastic primordial dwarfism is delineated in a 5- year-old female child with severe growth retardation of prenatal onset, gross skeletal changes, a non-Seckel facial phenotype, and presumed autosomal recessive inheritance.
Metástasis óseas secundarias a carcinoma renal diagnosticadas mediante gammagrafía ósea
2001
We reported the case of a 35-y-old man with renal cell carcinoma and cold lesions detected by bone scintigraphy, related to metastatic involvement. Conventional X-Ray did not show any pathological findings, being confirmed by axial computed tomography (CT) the scintigraphic bone lesions. We have accomplished a discussion of the role of bone scintigraphy and complementary techniques (radiography, alkaline phosphatase levels) in the diagnosis of bone metastases in renal cell carcinoma.
Modulation of melanoma-associated antigens by monoclonal antibodies as visualized by radioimmunoelectron microscopy and radioantibody binding assay
1987
There is a wealth of information about monoclonal antibody (MAb) specificity and function on fixed tissues, yet little is known about formation and release of antigen-antibody complexes and their functional behavior in vivo. We analyzed the pathway of radiolabeled MAbs directed against melanoma-associated antigens by radioimmunoelectron microscopy (RIEM) on metabolically active cells of the melanoma cell lines SK-MEL-28, MeWo and Colo 38 at different time intervals. In parallel, binding and release of MAbs were investigated by the radioantibody binding assay (RBA). Both procedures gave essentially concordant results. Preferentially stable binding of immune complexes (ICs) to the cell surfac…
Okkulte Fraktur einer Achillessehnenossifikation ohne begleitende Sehnenruptur
2000
Ossification of the Achilles tendon is the result of a traumatic, hypoxic injury of the tendon. The usually asymptomatic ossification has a clinical importance only in case of a new trauma. We report about a patient with an isolated fracture of the ossification without an accompanying rupture of the Achilles tendon. Because of the radiologically "occult" fracture the diagnosis could only be verified by MRI. With a conservative treatment without resection of the ossification we could reach painless recovery.
Anomalous Origins of the Left Main Coronary Artery From the Noncoronary Sinus and of the Right Coronary Artery From the Left Sinus of Valsalva
1997
A 70-year-old man was referred for recent-onset angina. The ECG showed a right-axis deviation and signs of an old anterior infarction with loss of R waves in leads V1 through V5. Chest radiograph demonstrated a markedly enlarged heart, which was shifted to the left side with discrete signs of pulmonary congestion. Transthoracic echocardiography, which was limited by poor imaging quality, revealed a normal left ventricular cavity with reduced ejection fraction (40%) due to hypokinesia of the anterior wall. Coronary angiography showed the dominant RCA to originate from the left sinus of Valsalva. It coursed between the aorta and the pulmonary artery to the right (Figs …
3D reconstruction techniques made easy: know-how and pictures
2005
Three-dimensional reconstructions represent a visual-based tool for illustrating the basis of three-dimensional post-processing such as interpolation, ray-casting, segmentation, percentage classification, gradient calculation, shading and illumination. The knowledge of the optimal scanning and reconstruction parameters facilitates the use of three-dimensional reconstruction techniques in clinical practise. The aim of this article is to explain the principles of multidimensional image processing in a pictorial way and the advantages and limitations of the different possibilities of 3D visualisation.
Role of virtopsy in the post-mortem diagnosis of drowning.
2014
Purpose: Due to admitted limits of autopsy-based studies in the diagnosis of drowning, virtopsy is considered the new imaging horizon in these post-mortem studies. The aim of our study was to evaluate the role of virtopsy performed through computed tomography (CT) in the forensic diagnosis of drowning. Materials and methods: We retrospectively examined the CT data of four cadavers recovered from sea water and suspected to have died by drowning. Each patient underwent a full-body post-mortem CT scan, and then a traditional autopsy. Conclusion: To date, there are no autopsy findings pathognomonic of drowning. This study proves that virtopsy is a useful tool in the diagnosis of drowning in tha…