Computerized fluoroscopy: digital subtraction for intravenous angiocardiography and arteriography

Crummy, Andrew B.; Strother, C M; Jf, Sackett; Dl, Ergun; Cg, Shaw; Ra, Kruger; Mistretta, C A; Wd, Turnipseed; Lieberman, Robert P.; Myerowitz, P. David; Ruzicka, F. F.

doi:10.2214/ajr.135.6.1131

Cited by 116 publications

(23 citation statements)

References 15 publications

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“…14,15 The first digital subtraction angiogram was successfully performed and reported in 1977, followed by other digital imaging applications in radiology. [16][17][18] These developments paved the way for direct transmission of digitally acquired images for the practice of teleradiology. 19 Computed radiography (CR) uses a photostimulable storage phosphor cassette to store digitally produced X-ray images.…”

Section: Modalities Of Teleradiologymentioning

confidence: 99%

The Empirical Foundations of Teleradiology and Related Applications: A Review of the Evidence

Bashshur

Krupiński

Thrall

et al. 2016

Telemedicine and e-Health

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Introduction: Radiology was founded on a technological discovery by Wilhelm Roentgen in 1895. Teleradiology also had its roots in technology dating back to 1947 with the successful transmission of radiographic images through telephone lines. Diagnostic radiology has become the eye of medicine in terms of diagnosing and treating injury and disease. This article documents the empirical foundations of teleradiology. Methods: A selective review of the credible literature during the past decade (2005-2015) was conducted, using robust research design and adequate sample size as criteria for inclusion. Findings: The evidence regarding feasibility of teleradiology and related information technology applications has been well documented for several decades. The majority of studies focused on intermediate outcomes, as indicated by comparability between teleradiology and conventional radiology. A consistent trend of concordance between the two modalities was observed in terms of diagnostic accuracy and reliability. Additional benefits include reductions in patient transfer, rehospitalization, and length of stay.

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Section: Modalities Of Teleradiologymentioning

confidence: 99%

The Empirical Foundations of Teleradiology and Related Applications: A Review of the Evidence

Bashshur

Krupiński

Thrall

et al. 2016

Telemedicine and e-Health

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show abstract

“…[10][11][12][13][14][15][16][17][18][19][20] Echocardiography is the method of choice for diagnosis of aortic dissection because it is less invasive and less expensive than other methods. Transthoracic echocardiography is less reliable in patients with obesity, pulmonary emphysema, or thorax deformation.…”

mentioning

confidence: 99%

Ambulatory follow-up of aortic dissection by transesophageal two-dimensional and color-coded Doppler echocardiography.

et al. 1989

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Follow-up of 18 patients with aortic dissection (five with type I, one with type II, 11 with type III dissection according to DeBakey) by transesophageal, two-dimensional and color-coded Doppler echocardiography showed a persistence of the false lumen in five of seven patients (71%) after surgery and in nine of 11 patients (82%) after medical therapy. In two patients treated with surgery, the dissected part of the aorta had been resected, whereas in two patients treated medically, a progressive and complete obliteration of the false lumen was observed. In the false lumen, thrombus formation was absent in four, localized in four, and progressive in six patients. Flow within the false lumen could be registered in 14 patients, and two distinct flow patterns were differentiated (laminar biphasic flow or slowly circulating flow). Persisting intimal tears were visualized by two-dimensional echocardiography in four patients, whereas colorcoded Doppler showed an additional one to three intimal tears in the descending aorta in 10 patients. Flow across these intimal tears was biphasic in 75% of patients; that is, systolic flow was directed from the true to the false lumen with diastolic flow reversal. Unidirectional flow was detected in 25% of the communications, directed in 20%o from the true to the false lumen, serving as an entry only and in one (5%) as reentry only. Additional information concerning complications like extension of the dissection (one of 18 patients), localized dilatation of the aorta (two of 18 patients), mediastinal hematoma (one of 18 patients), or aortic regurgitation (three of 18 patients) were detected by this method. Concerning the morphologic findings and the detection of flow characteristics, the transesophageal approach was superior to conventional echocardiography especially in the descending thoracic aorta. Thus, transesophageal twodimensional and color-coded Doppler echocardiography seems to be an ideal method not only for the easy detection of aortic dissection but also for follow-up. (Circulation 1989;80:24-33 Transesophageal echocardiography overcomes these methodologic limitations and is of great diagnostic value because of high-quality cross-sectional images of the ascending and descending thoracic aorta even in patients in shock or on mechanical ventilation.23-30 Surgery without further diagnostic investigation has been performed successfully in emergency cases.30 In combination with color-coded Doppler flow imaging, which superimposes flow information

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“…Time-interval differencing is another time-based "first-order" subtraction technique, but it differs from the others in that the images being subtracted are temporally separated by a short (30-60 ms) interval [15]. Subtraction of these post-contrast administration frames displays contrast bolus transit and wall motion that have occurred within the time difference between the frames.…”

Section: Subtraction Techniquesmentioning

confidence: 99%

Left ventricular imaging by digital subtraction angiography

Vogel

1988

Int J Cardiac Imag

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Digital radiography is a rapidly developing new approach to cardiovascular imaging that converts radiographic and fluoroscopic video images into digital format for subsequent image enhancement analysis, and storage. Left ventriculography can be performed by this method using either intravenous or low-dose intraventricular contrast administration. Advantages over standard radiography include reduced radiation and contrast medium burden, visualization of very low contrast medium concentrations, and an image format that can be directly analyzed by quantitative techniques. As these cardiac applications are developed and improved archiving is implemented, it is likely that the digital left ventriculography will replace standard cardiac angiography.

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Computerized fluoroscopy: digital subtraction for intravenous angiocardiography and arteriography

Cited by 116 publications

References 15 publications

The Empirical Foundations of Teleradiology and Related Applications: A Review of the Evidence

The Empirical Foundations of Teleradiology and Related Applications: A Review of the Evidence

Ambulatory follow-up of aortic dissection by transesophageal two-dimensional and color-coded Doppler echocardiography.

Left ventricular imaging by digital subtraction angiography

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