When a smoker takes one puff of a cigarette, about 30% of the brain's most common nicotine receptors are affected. With three puffs, the nicotine in the cigarette occupies about 70% of the receptors. The smoker becomes satisfied when nearly all of the receptors are occupied, usually after smoking about three cigarettes.
Step-by-step checklist should enable differentiation of pathology even on plain film x-ray
Elderly patients can undergo CT scanning of the pancreatobiliary region with only 90% or less of the contrast dose required in other patients without compromising the exam's quality.
Neuroimaging research has contributed enormously to our understanding of structural and functional differences between the brains of people with schizophrenia and those of healthy people. Imaging now offers insights into how drugs used to treat schizophrenia work as well as the genetic mechanisms that lie at the root of these disorders.
After 19 years in a minimally conscious state, a man recovered language and motor function. Diffusion tensor imaging showed reorganization of the patient's white matter, possibly facilitating functional recovery.
Ovarian cancer accounts for nearly 3% of all cancers among women. It is the second most common gynecological malignancy in the U.S., following carcinoma of the uterine corpus.
MRI performed at an unlimited specific absorption rate is safe in patients with some permanent pacemakers or implantable cardioverter/defibrillator systems, as long as precautions are taken, according to a study from Israel.
In rectal cancer, mortality rates are high and prognoses are generally poor, owing to the strong risk of metastases and local recurrence.
MRI is providing valuable clinical information that is enabling injured Olympic divers to get their careers back on track.
Cutting prenatal exposure wherever possible, but not at the expense of necessary treatment, requires subtlety and care
Political differences abound as radiology practitioner assistants, radiologist assistants help imaging departments save time and money
Hyperscanning allows multiple subjects in separate MR scanners to interact with one another
Quantitative analysis of myocardial defects could move into routine clinical use with advances
Developments demonstrate consolidation of field strengths at modality's high end
Practical tips from one early adopter demonstrate dos and don'ts of transitioning to 3T MR imaging
An unconscious, outwardly unresponsive patient apparently was capable of understanding and responding to certain commands as measured by functional MRI.
No fewer than eight medical specialty societies, including the American College of Radiology and a section of the American College of Cardiology, signed off on a report covering clinical appropriateness criteria for cardiac CT and MR. In other reports, a cardiologist proposes an imaging fellowship for cardiology, and a radiologist describes a strategy to win the coronary CT angiography turf war.
Cardiologists will become increasingly dependent on angiograms generated using CT and MR over the next three years, according to a report released by IMV Medical Information Division, a Des Plaines, IL, market research firm. Within that time, cardiologists predict that CT angiography will take the place of SPECT and cardiac catheterization for evaluating seven of 11 major cardiac conditions.
Two investigative studies have found that MR angiography at 3T produces quality images of the kidneys and excellent cardiac cine images. Researchers used high parallel imaging factors and a 32-element phased-array coil to increase spatial resolution and anatomic coverage.
An international multicenter trial has validated the Edmonton Protocol for islet cell infusion as a fitting treatment alternative for certain patients suffering from type 1 diabetes. Results appeared in the Sept. 28 issue of The New England Journal of Medicine.
