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PubMedDate not supplied

[The TsFK-1 digital camera for fluorography and roentgenography].

Digital X-ray apparatuses have been designed to substitute for film fluorographs, which are noted for smaller radiation loads and high image quality. The paper describes one of such apparatuses, whose distinctive feature is the use of a low-noise CCD matrix having high-resolution matrix and a high performance luminescence screen. It outlines prospective variants of the use of the apparatus, describes the basic set supplied and its operation, gives its technical data and dimensions.

Equipment Design↗
PubMed1999

[Adaptation of computed tomography and roentgenography to bone density measurements].

The increasing interest in issues connected with osteoporosis has recently caused the development of many new diagnostic methods which allow the measurement of bone density. The DEXA method, performed by specialised densitometers, is one of the most developed and reliable methods. However, the high cost od densitometers and DEXA investigation prevent this method from becoming easily accessible for everyday diagnosis. The adaptation of computerised tomography and rentgenography to densitometric measurements could be one of the methods by which the problem of densitometric diagnosis accessibility could be solved. Both methods are usually applied in the imaging of human tissues, working on the basis of differences in tissue X-ray absorption. X-ray absorption and density are related by linear function in the energy range used in rentgenography and tomography; therefore, quantitative information concerning density should be easily received. The procedure adapting computerised tomography and rentgenography to quantitative measurements of bone density in the lumbar spine is outlined in this work. The quantitative information is obtained from digitalised tomographic and rentgenographic images through use of a personal computer. Both methods were tested using a set of phantoms imitating the lumbar spine and the surrounding tissues. The precision and accuracy of both methods were assessed and compared to the precision and accuracy of the DEXA method. The outlined results confirm the usefulness of the described method in diagnosis.

Absorptiometry, Photon↗
PubMed1975

[View of the past: Roentgenography of an Egyptian mummy].

Report concerning roentgenographic examinations of an Egyptian mummy dating back to 900 B.C. from the "Museum für Völkerkunde Freiburg/Breisgau". The study was performed to detect funeral gifts which can be found otherwise only if the linnen bandage of the mummy is destroyed. Extraordinary findings were degenerative osteoarthritis of the spine and joints, pseudo-gout, marked caries of several teeth and signs for a healed occipital osteomyelitis. Suggestions are discussed about a particular compression of thorax and pelvis which is apparently due to the technique of bandaging. This was not observed in examinations of other mummies. Fractures of the first to third phalanges suggest forceful removal of precious rings. A circular-shaped opening in the parietal bone and a small radiodense foreign body which projects over the pharynx remain unexplained.

Dental Caries↗
PubMedDate not supplied

[An experimental study of the film parameters for general roentgenography].

The paper deals with methods for determining the technical data of a film for general X-ray study, presents basic sensitometric parameters of the films used in Russia, defines their parameters when used in as part of a kit also containing the intensifying screens made in the country, and provides recommendations on their use.

Radiography↗
PubMed1975

Rotational cerebral roentgenography. I. Evaluation of the technical procedure and diagnostic application with model studies.

A rotational cerebral roentgenographic technique with a 70 mm camera is elaborated in model studies of the plain and cerebrovascular system. The tube-camera-unit rotates in a semicircle in 5 to 6 seconds around a skull placed in the isocentrum. All special projections of the skull are obtained routinely during one rotational manoeuvre, and intracranial calcifications, foreign bodies and abnormalities of the calvarium are demonstrated sequentially in oblique or tangential views. Studies of the basal cerebral arteries have shown that the localization, size and configuration of arterial aneurysms and stenoses can be demonstrated reliably without changing the position of the skull. An exposure frequency of 6/sec results invariably in excellent stereoscopic views. The diagnostic value and applicability of this technique is discussed.

Cerebral Angiography↗