Medical Physics: Page 11

Young women have highest cancer risk from body CT scans
By Erik L. Ridley
PHILADELPHIA - The age and gender of patients are significant determining variables in calculating the risk of radiation-induced cancer from body CT scans, with young women at highest risk, according to research presented Monday at the American Association of Physicists in Medicine annual meeting.
July 19, 2010
Mayo method enables perfusion CT in a fraction of the dose
By Eric Barnes
A new image-processing algorithm gives radiologists everything they need to diagnose perfusion CT images using up to 95% less radiation, according to research presented at this week's American Association of Physicists in Medicine meeting in Philadelphia.
July 19, 2010
Nucletron debuts Oncentra v4.0
By AuntMinnie.com staff writers
Radiation oncology firm Nucletron unveiled its new Oncentra v4.0 at this week's American Association of Physicists in Medicine annual meeting in Philadelphia.
July 19, 2010
New technologies show promise for breast imaging
By Kate Madden Yee
Conebeam CT, breast MRI, and dual-energy mammography show promise as techniques to quantify breast density, which is linked to a higher risk of breast cancer, according to two new studies to be presented at this week's American Association of Physicists in Medicine (AAPM) annual meeting in Philadelphia.
July 19, 2010
Pediatric CT settings should be adjusted to child's body size
By Cynthia E. Keen
Body diameter measurements, not age, should be the criteria to determine optimal radiation exposure factors for children having CT exams, according to recent research conducted by pediatric radiologists and medical physicists from Children's Hospital Boston.
May 24, 2010
Societies to host meeting on radiation safety
By AuntMinnie.com staff writers
The American Association of Physicists in Medicine and the American Society for Radiation Oncology are hosting a meeting in Miami, June 24-25, to address radiation safety in radiation oncology.
April 15, 2010
Automated exposure control delivers uneven CT dose reduction
By Eric Barnes
Reducing tube current may be a popular way to lower CT radiation dose, but it's not necessarily an effective one. In a new study, medical physicists from Greece found that organ dose reductions resulting from tube current modulation with automated exposure control can vary -- especially in children.
April 14, 2010
ACR revises accreditation program
By AuntMinnie.com staff writers
The American College of Radiology (ACR) has revised its requirements for medical physicists and MR scientists, effective January 1, 2010.
December 14, 2009
Electrocardiogram pulsing, adaptive pitch cut coronary CTA dose
By Eric Barnes
Educational Exhibit | LL-PH4828-L09 | Lakeside CenterTwo important dose reduction techniques are illustrated in this exhibit: adaptive electrocardiogram-pulsing and adaptive pitch selection. The rationale and physics behind these techniques are discussed and, more important, illustrated with the aid of real-world examples and cases, according to CT physicist Marcel van Straten, Ph.D., from Friedrich-Alexander University Erlangen-Nuremberg in Germany.
November 15, 2009
Dose-length product more accurate for measuring cardiac CT dose
By Eric Barnes
Monday, November 30 | 10:40 a.m.-10:50 a.m. | SSC02-02 | Room S503ABGlobal chest CT conversion factors, which are often used to calculate effective dose at cardiac CT, do not account for the variability of dose distribution with the procedure, according to radiation physicist Walter Huda, Ph.D., from the Medical University of South Carolina in Charleston.
November 15, 2009
Landauer makes two acquisitions
By AuntMinnie.com staff writers
Radiation monitoring firm Landauer has acquired two companies as part of the vendor's push into the medical physics market.
November 10, 2009
VMAT bests IMRT for prostate cancer treatment time
By Paula Gould
In terms of dosimetric accuracy, volumetric-modulated arc therapy (VMAT) is comparable to step-and-shoot intensity-modulated radiation therapy (IMRT), but VMAT cuts treatment time considerably, according to research from Memorial Sloan-Kettering Cancer Center.
August 23, 2009
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