Image contrast in CT is mostly dependent on elements with high atomic weight, such as calcium, iron, and iodine The concentrations of these elements can be calculated from dual-energy x-ray data based on their characteristic attenuation patterns Dual-energy CT may can be helpful in neuroimaging to: Differentiate between hemorrhage and iodinated contrast agents in brain parenchyma Improve CT ang...

In this work, we have prospectively examined the diagnostic value of adenosine-induced stress myocardial perfusion MRI using SW-CG-HYPR in 50 patients with suspected CAD. Using the high-resolution, whole left ventricle SW-CG-HYPR method, perfusion MRI was able to depict hemodynamically relevant coronary artery stenosis with an accuracy of 90% and 93% based on perpatient and per-vessel analyses,...

SUMMARY We applied regional perfusion imaging (RPI), a new arterial spin-labeling MR imaging method that selectively studies regions of the brain perfused by individual carotid and basilar arteries. In a patient with cerebrovascular disease, RPI showed cerebral tissue perfused by pial collateral vessels, thereby demonstrating the relationship between anatomic and functional information, which w...

Background CMR is the preeminent imaging technique to assess LV function and myocardial injury. With the advent of combined angiography / CMR suites, there is an opportunity to perform combined invasive hemodynamic evaluation and treatments further informed by CMR imaging. However, key considerations are safety issues in potentially unstable patients in the context of MR and X-ray hazards. Here...

We report a case of central venous stenosis due to a structural deformity caused by a tuberculosis-destroyed lung in a 65-year-old woman. The patient presented with left facial edema. She had a history of pulmonary tuberculosis, and the chest X-ray revealed a collapsed left lung. Angiography showed leftward deviation of the innominate vein leading to kinking and stenosis of the internal jugular...

chest X-ray film (Fig. 1). Clinical examination was normal. Computed tomographic angiography of the chest (Figs. 2, 3) showed a balanced type of double aortic arch, both of which arose from the ascending aorta anterior to the tracheae. Each arch gave origin to the common carotid and subclavian artery, and joined right posterior ward to form the descending aorta. The patient had neither respirat...

Background Cardiac magnetic resonance imaging (CMR) including adenosine perfusion and late gadolinium enhancement (LGE) at 1.5 Tesla (T) has been established for noninvasive detection of relevant coronary artery disease (CAD). However, little is known about the potential advantages of 3.0-T to detect CAD. The aim of our prospective study was to compare a compiled clinical routine CMR protocol p...

In addition to their weight posing logistical challenges [6], the body habitus of the morbidly obese severely limits the signal-to-noise ratio (SNR), which prevents reliable diagnostic imaging. In cardiac catheterization laboratories, image quality is limited by the power of the X-ray generators. Invasive coronary angiography in the extremely obese may be compromised both by poor image quality ...

Results The prevalence of CAD was 55%. In the per-patient analysis, the sensitivity, specificity and accuracy of SW-CG-HYPR myocardial perfusion imaging were 95%, 83% and 90%, respectively. In the per-vessel analysis, these values were 98%, 89% and 93%, respectively. Figure 1 illustrates the detection of significant CAD by SW-CG-HYPR myocardial perfusion imaging with correlation to X-ray corona...

Background To compare a compiled clinical routine cardiac magnetic resonance imaging (CMR) protocol performed at both 1.5-T and 3.0-T in patients with suspected coronary artery disease (CAD) undergoing coronary x-ray angiography. CMR including adenosine perfusion and late gadolinium enhancement (LGE) at 1.5-T has been established for noninvasive detection of relevant CAD. However, little is kno...