Results 311 to 320 of about 9,914,485 (355)
Some of the next articles are maybe not open access.
Pancreatic Radionuclide Imaging Using Electronic Subtraction Technique
Radiology, 1971A digital data storage and processing technique was used in 75Se methionine pancreatic studies in 62 patients. In 26 of these subtraction images were obtained. Diagnosis was correct in 42 of 45 studies interpreted as normal. Space-occupying lesions were found in 9 of 12 cases of abnormal scan. There was 1 technical failure.
E V, Staab +3 more
openaire +2 more sources
Digital Subtraction Angiography: Technology, Equipment, and Techniques
Radiologic Clinics of North America, 1985The equipment used in digital subtraction angiography is a combination of x-ray equipment and high-speed image-processing equipment. In this article, the components of a DSA system are described, including the x-ray generator, x-ray tube, image intensifier, television system, analog-to-digital (A-D) convertor, image processor, and image acquisition ...
T W, Ovitt, J D, Newell
openaire +3 more sources
A digital subtraction technique for dental radiography
Oral Surgery, Oral Medicine, Oral Pathology, 1983The relative accessibility and stability of the teeth facilitate generation of geometrically identical radiographs over a period of time. When such radiographs are digitized with the aid of a TV camera coupled to an analog to digital converter and a computer, it is possible to conveniently produce subtraction images of high diagnostic value.
H G, Gröndahl +2 more
openaire +2 more sources
Incoherent image addition and subtraction: a technique
Applied Optics, 1979A technique of incoherent image addition and subtraction is described. The basic advantage of this technique is its use of white light processing, in which case the unavoidable artifact noise in the coherent optical processor may be removed. Although the incoherent processing technique that we have proposed is effective only in a 1-D operation, it also
F T, Yu, A, Tai
openaire +2 more sources
Radiology, 1974
The authors describe a new technique of second-order subtraction in which the degree of contrast is built up, separating vessels from the surrounding structures more clearly because the correction film is completely lucent over the vessels.
D L, Sucher, R D, Strand
openaire +2 more sources
The authors describe a new technique of second-order subtraction in which the degree of contrast is built up, separating vessels from the surrounding structures more clearly because the correction film is completely lucent over the vessels.
D L, Sucher, R D, Strand
openaire +2 more sources
Intravenous arteriography using digital subtraction techniques.
JAMA, 1982The application of digital computers to electronic x-ray imaging devices has rejuvenated interest in the field of intravenous arteriography. By utilizing computer image subtraction techniques, digital roentgenographic systems based on fluoroscopy or computed tomography (scanned projection radiography) provide significantly improved vascular imaging ...
W R, Brody +6 more
openaire +3 more sources
[Digital subtraction technique in dentistry].
Revue belge de medecine dentaire, 2008By computerized subtracting the grey values of geometrically corresponding pixels in consecutively taken digital X-ray images, it is possible to visualize or measure changes in radiodensity over time. This can be very useful, both in clinical and research applications, for the follow-up of tooth mineralization or bone changes. A major problem, however,
Peter, Bottenberg +2 more
openaire +1 more source
Intravenous angiography utilizing digital video subtraction techniques
The American Journal of Cardiology, 198251 l-3. 7. Higgins CB, Sovak M, Schmidt W, Siemers PT. Uptake of contrast material by experimental acute myocardial infarctions: a preliminary report. Invest Radio1 1978;13:337-9. 8. Lipton MJ, Hayashi lT, Boyd D, Carlsson E. Measurement of left ventricular cast volume by computed tomography. Radiology 1978;127:419-423. 9.
openaire +2 more sources
A subtraction technique in conventional angiography.
Radiology, 1984A subtraction technique is described for conventional angiography by which a superimposed vessel can be removed, allowing exact visualization of the area in question. The method is easy, requires only standard subtraction apparatus, and obviates the need for additional contrast material injections.
S L, Schatz +3 more
openaire +2 more sources
[Dacryocystography in digital subtraction technique].
Aktuelle Radiologie, 1996The authors emphasize the usefulness of dacryography to approach patients affected by epiphora. Digital dacryocystography had improved the anatomic and functional assessment of lacrimal apparatus. The methodology allowed in all patients an accurate visualization of the lacrimal system and the identification, in twenty cases, of pathological causes of ...
A, Ragozzino +5 more
openaire +1 more source