Resources: Page 499

Blending ASIR and back-projection algorithms saves chest dose, time
By Eric Barnes
Tuesday, December 1 | 11:30 a.m.-11:40 a.m. | SSG03-07 | Room S404CDThis study from Massachusetts General Hospital, scheduled to be presented Tuesday morning, aimed to find the optimal blend of adaptive statistical iterative reconstruction (ASIR) and filtered back projection (FBP) reconstruction for low-dose and rapid chest CT.
November 15, 2009
Interventional CT doses tamed in broad assessment
By Eric Barnes
Tuesday, December 1 | 11:30 a.m.-11:40 a.m. | SSG19-07 | Room S404ABWide variations were found in the dose levels for five common CT-guided interventional procedures, prompting researchers at Mayo Clinic in Rochester, MN, to adopt a comprehensive program of dose reduction strategies.
November 15, 2009
320-detector CTA cuts runoff contrast dose, broadens patient population
By Eric Barnes
Tuesday, December 1 | 11:20 a.m.-11:30 a.m. | SSG21-06 | Room E353BThe speed and wide coverage of 320-detector-row CT could permit lower contrast doses and potentially even allow runoff CT angiography (CTA) studies in some patients with renal insufficiency, according to researchers from the University of Toronto.
November 15, 2009
DECT beats manual bone subtraction in peripheral artery disease
By Eric Barnes
Tuesday, December 1 | 11:10 a.m.-11:20 a.m. | SSG21-05 | Room E353BRecently introduced dual-energy CT (DECT) methods may present an attractive alternative to conventional bone subtraction techniques, according to researchers from the University of California, Los Angeles.
November 15, 2009
Individuals with coronary artery calcium need osteoporosis screening
By Eric Barnes
Tuesday, December 1 | 10:50 a.m.-11:00 a.m. | SSG12-03 | Room E450BA growing body of evidence is showing an association between osteopenia and osteoporosis and a higher incidence of obstructive coronary artery disease, a topic to be explored in this scientific session presentation.
November 15, 2009
Ultralow-dose CT replaces x-ray of the acute abdomen
By Eric Barnes
Tuesday, December 1 | 10:50 a.m.-11:00 a.m. | VE31-09 | Room S103CDThe use of x-ray is standard practice in many facilities for young patients presenting with acute abdomen, but it doesn't always do the job. Ultralow-dose CT is another option that may provide more diagnostic information, according to study results to be presented in this Tuesday morning session.
November 15, 2009
Cumulative CT doses reveal patients at risk from multiple scans
By Eric Barnes
Monday, November 30 | 3:50 p.m.-4:00 p.m. | SSE22-06 | Room S403BThe integration of CT into routine care is widely considered one of the most important advances in medicine; however, the frequent use of CT has substantially increased the population's cumulative exposure to ionizing radiation.
November 15, 2009
Korean CT dose survey finds scanner quality, education key to dose reduction
By Eric Barnes
Monday, November 30 | 3:30 p.m.-3:40 p.m. | SSE22-04 | Room S403BDr. Seung Eun Jung and colleagues from the Catholic University in Seoul sampled almost 13% of the country's CT scanners, directly measuring CT dose index on a phantom and recording scanning parameters at institutions for head, chest, and abdomen CT, calculating effective doses using automated software.
November 15, 2009
High-definition scanner offers sharper stent images
By Eric Barnes
Monday, November 30 | 11:40 a.m.-11:50 a.m. | SSC02-08 | Room S503ABDense stent materials and the resulting blooming artifacts on CT inhibit assessment of in-stent lumens. High-definition CT with high spatial resolution provided better accuracy of in-stent lumen sizes, according to research to be presented on Monday.
November 15, 2009
ASIR reconstruction boosts diagnostic power in HRCT of diffuse lung disease
By Eric Barnes
Monday, November 30 | 3:50 p.m.-4:00 p.m. | SSE06-06 | Room S404CDHigh-resolution CT (HRCT) with thin slices and high-spatial-frequency algorithms is the gold standard for evaluating diffuse lung disease. Most high-resolution CT scans are reconstructed using filtered back projection, but a new algorithm -- adaptive statistical iterative reconstruction (ASIR) -- may offer better image quality.
November 15, 2009
No problems after discharge for negative coronary CTA
By Eric Barnes
Monday, November 30 | 3:10 p.m.-3:20 p.m. | SSE03-02 | Room S502ABA negative coronary CT angiography (CTA) exam allows hospitals to send chest pain patients home and clear the backlog in the ER. But is it really safe? How do patients do over time? Researchers from the University of Washington School of Medicine in Seattle wanted to find out.
November 15, 2009
Experiment validates use of CT for in-stent stenosis assessment
By Eric Barnes
Monday, November 30 | 11:50 a.m.-12:00 p.m. | SSC02-09 | Room S503ABInvestigators from Brigham and Women's Hospital in Boston scanned a series of phantom coronary artery stenoses to validate CT assessment of coronary artery stenoses. They will discuss their results in this Monday scientific session presentation.
November 15, 2009
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