Eric Barnes

CT
CT often unjustified in the young; German pediatricians lack dose awareness
VIENNA - About a third of the CT scans performed in patients younger than 35 could be replaced by other modalities, concludes a Norwegian study presented Tuesday at the European Congress of Radiology. Meanwhile, a survey in the region of Essen, Germany, found that many pediatricians lack basic knowledge of radiation exposures for various chest indications.
March 9, 2009
CT
NELSON lung cancer trial yields positive early results
VIENNA - A first peek at the first results of the first large randomized lung cancer screening trial to near completion found that CT detected four-fifths of participants' lung cancers at stage I -- in time to effect a curative resection.
March 8, 2009
CT
Diabetes renders coronary CTA more difficult, less successful
VIENNA - Diabetic patients have smaller vessels and larger coronary artery calcifications than nondiabetics, a combination that reduces the utility of coronary CT angiography (CTA), according to a new study from Italy.
March 7, 2009
2009 03 08 13 47 25 91 Andreini thumb
Nuclear Medicine
3D CT detection of perfusion defects mirrors SPECT
VIENNA - Three-dimensional images from normal coronary CT angiography scans are highly sensitive for detecting fixed perfusion defects compared to myocardial SPECT. A special reconstruction technique performed with customized software does the job without the need for additional radiation or contrast.
March 7, 2009
CT
Minimal prep VC nearly as sensitive, better tolerated
VIENNA - A new study from the U.S. and Japan found that full-laxative and minimum-laxative virtual colonoscopy had equivalent sensitivities for detecting colorectal polyps 6 mm and larger, though specificity fell in the minimum-prep regimen. The patients were happy to skip the laxatives, however.
March 6, 2009
2009 03 07 12 06 53 997 Nappi thumb 03 09 70
CT
320-slice coronary CTA permits much lower contrast dose
VIENNA - Single-beat scanning not only enables significant radiation dose reductions in coronary CT angiography (CTA), the short duration of the scan permits drastically lower contrast doses as well, at least in patients with regular heartbeats and no arrhythmias.
March 5, 2009
Digital X-Ray
Opacification at 320-row CT distinguishes normal, stenosed vessels
Researchers at Brigham and Women's Hospital in Boston have developed a new way to evaluate the coronary arteries, using a method based on the change in contrast opacification along the length of normal versus stenosed coronary arteries.
March 5, 2009
2009 02 27 17 39 21 30 Mitsouras thumb 03 09
Nuclear Medicine
NCRP report: CT drives massive increase in medical radiation dose
The U.S. population's exposure to ionizing radiation from medical procedures grew more than sevenfold between the early 1980s and 2006 -- an increase largely attributable to spectacular growth in CT use, according to a report released today by the National Council on Radiation Protection and Measurements (NCRP).
March 2, 2009
2009 03 02 17 08 56 389 2009 03 02 Radioactive Symbol
Cardiac Imaging
AuntMinnie.com Cardiac Imaging Insider
March 1, 2009
Digital X-Ray
Prospective coronary CTA performs well in heavy patients
Prospectively gated coronary CT angiography (CTA) performed well when scanning patients who were heavy or had high calcium scores, according to a study that tracked predictors of success with the low-dose technique. On the other hand, image quality dropped significantly when heart rates or heart rate variability was high.
February 26, 2009
2009 02 26 15 15 33 874 Earls thumb 02 09
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Pneumonia can hide underlying lung cancers, and repeat imaging with PET/CT should be considered in patients with high clinical suspicion of malignancy.
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ChatGPT shows potential for diagnosing nuclear medicine cases, yet needs further development before it can be implemented in practice.
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DBT plus mammo detects breast cancers with higher histologic grades
By Amerigo Allegretto
Digital breast tomosynthesis (DBT) plus synthesized mammography screening leads to higher detection of early-stage invasive breast cancers grades 2 or 3.
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Imaging depicts a screen-detected invasive breast cancer in the dense breast tissue of a 59-year-old woman. A section in the mediolateral oblique view from a DBT exam of the left breast shows an irregular mass with surrounding architectural distortion (circle). The participant had no history of breast cancer and had been screened previously in the German mammography screening program. Histologic analysis showed invasive carcinoma of no special type, grade 2, with tumor size of 18 mm. Image courtesy of the RSNA.
Volumetric analysis of MR images identifies effects of Parkinson's
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