Inverse Compton radiation: a novel X-ray source for K-edge subtraction angiography?
Inverse Compton radiation: a novel X-ray source for K-edge subtraction angiography? Phys Med Biol. 2019 Jul 15;: Authors: Paternò G, Cardarelli P, Gambaccini M, Serafini L, Petrillo V, Drebot I, Taibi A Abstract Coronary angiography is clinically used worldwide to diagnose diseases of coronary arteries. Despite its effectiveness, this technique is quite invasive and it is associated to significant risks due to the arterial catheterisation needed to inject the contrast agent. A valid alternative is using the K-edge subtraction method, which is based on the subtraction of two images acquired at energies bracketing the K-edge of the contrast element. The enhanced sensitivity of K-edge subtraction allows the intravenous injection of the contrast agent, thus reducing the risks of catheterisation. This technique can be effectively implemented by using intense and quasi-monochromatic X-ray beams. Synchrotron radiation has been proven to work well for this purpose, but its cost and size prevent a widespread clinical application. Inverse Compton sources are among the most promising innovative sources of intense and quasi-monochromatic X-rays. These sources are intrinsically more compact than those based on synchrotron radiation. In this work, the potential application of inverse Compton radiation to K-edge subtraction angiography is investigated. To this purpose, after a short review of the physics behind the inverse Compton process, an analytica...
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Innova IGS 630, Angiographic X-Ray, s5i system option used in generating fluoroscopic and rotational images of human anatomy for cardiovascular, vascular and non-vascular, diagnostic and interventional procedures.
CONCLUSION: The results show that lead containing and lead free composite garments probably provide less radiation protection than manufacturer stated lead equivalence. The demonstrated wide variations in attenuation of scatter radiation are greater than previously reported. It was found that most garments failed to comply with labelling standards. The study highlights challenges in radiation shielding and the need to identify composites that consistently provide better attenuation per unit weight than lead. PMID: 31005510 [PubMed - as supplied by publisher]
ConclusionUsing the proposed denoising approach, it is possible to improve the image quality of low-dose DSA images. This improvement could enable both a reduction in contrast agent and radiation dose when acquiring DSA images, thereby benefiting patients as well as clinicians. Since the resulting images are free from artifacts and as the inherent characteristics of the images are also preserved, the proposed method seems to be well suited for clinical images as well.
The purpose of this study was to evaluate the x-ray shielding ability of a novel tungsten-particle-containing rubber-based finger sack for use in interventional radiology. Shielding rates for the air kerma (mGy m−1) were measured using a semiconductor dosimeter with and without the finger sack and commercial lead gloves, at a 20 cm distance from the field of view. A C-arm digital angiography system was used with x-ray tube voltages of 60, 80, 100, and 120 kVp. In addition, the 70 μm dose equivalent to the operator’s finger was measured using fluorescent glass dosimeters with and without the finger sack durin...
Abstract There have been some concerns about the influence of medical X rays in dose-response analysis of atomic bomb radiation on health outcomes. Among atomic bomb survivors in the Life Span Study, the association between atomic bomb radiation dose and exposures to medical X rays was investigated using questionnaire data collected by a mail survey conducted between 2007-2011, soliciting information on the history of computed tomography (CT) scans, gastrointestinal fluoroscopy, angiography and radiotherapy. Among 12,670 participants, 76% received at least one CT scan; 77%, a fluoroscopic examination; 23%, an angi...
The purpose of this study was to demonstrate feasibility of using holographic 3D Virtual Reality (VR) to visualize an angiographic catheter with electromagnetic (EM) sensors while selecting vessels in a co-registered vascular phantom. Electrophysiologists have nearly replaced angiography with EM catheter tracking. EM needle tracking is used during tumor ablation. Interventional Radiologists have not adopted this to endovascular catheters. The novel ability to visualize the catheter in coregistered dynamic VR allows one to view the 3D vascular anatomy while steering the catheter as never before possible.
TRINIAS for diagnostic imaging and interventional procedures in cardiac angiography, neurovascular angiography, abdominal angiography, peripheral angiography, rotational angiography, multi-purpose angiography and whole body radiographic/fluoroscopic procedures.