Dan Harvey


Zonare adds transducers, upgrades to ultrasound system

Zonare Medical Systems upgraded its ultrasound system with the introduction of two new transducers, calculation packages, and a program that automatically recognizes and adjusts for differences in body sound propagation.

Dan O'Neill


Electronic Image Orders and Web-based EMRs: An Industry Perspective

Physicians are increasingly demanding electronic interfaces with their imaging vendors. To do so, providers must look at new models like Web-based EMRs.

Daniel B. Kopans, MD


Kopans offers point by point rebuttal to Caruncho

I very much appreciate Dr. Caruncho’s thoughtful and detailed response to my article in Diagnostic Imaging. It is ironic I wrote the article before the U.S. Preventive Services Task Force published its new guidelines. Their scientifically unsupportable analysis merely reinforced the concerns I expressed in Diagnostic Imaging.

Daniel D. Saket, MD, MBA


ER-dedicated practitioners may address workload challenges

We face a defining challenge with regard to the provision of emergency radiology services. Exploding demand for these services comes at a time of relative staffing shortages, declining reimbursements, and rapid technological advancement, and this demand threatens to overwhelm our practices.

Daniel Floery, MD


MR breast imaging guides interventional procedures

Contrast-enhanced MR imaging has gained recognition in the last decade as a valuable adjunct to both mammography and ultrasound for detection of breast carcinomas. Most authors agree that the sensitivity of breast MRI is excellent, ranging between 88% and 100%, although specificity is only moderate, at 37% to 95%.

Daniel H. S. Silverman, MD, PhD


Neuroimaging sharpens focus on mild cognitive impairment

Brain imaging markers have emerged as important tools in the differential diagnosis of dementia. Parameters derived from brain imaging are being intensively examined as potential predictors to identify persons with only mild cognitive losses who face imminent decline and the full dementia syndrome of Alzheimer's disease. As novel disease modifying agents emerge, brain imaging markers also may facilitate drug development and help monitor drug efficacy in clinical settings.

Daniel Margolis, MD


Stanford CT symposium ignites both excitement and concern

The Stanford International Symposium on Multidetector-Row CT has gained such momentum in its nine-year history that the next meeting will be in a larger venue in Las Vegas. The growing importance of multislice CT is reflected in the wide range of topics presented this year.

Daniel S. Berman, MD


Nuclear cardiology adopts hybrid and dynamic imaging

Approach addresses pitfalls that have held back widespread use of SPECT/CT for myocardial ischemia

Daniela Prayer, MD


Indications expand for fetal MR imaging

Fetal MRI has become established in clinical practice over the past decade. MRI is indicated when conditions do not favor fetal ultrasound such as cases of maternal obesity or anhydramnios.1 It has also been shown that fetal MRI may discriminate among tissue components that do not display impedance differences on ultrasound; for instance, laminae in the developing brain.2 These advantages, along with MR's ability to delineate small structures, such as cranial nerves, has furthered its use as an adjunct to ultrasound in fetal imaging.1 Applications for fetal MRI are growing. The development of improved methods for fetal imaging, including availability of ultrafast sequences,3 has also furthered adoption.

Danielle DeMulder, MD


Image IQ: 50-year-old Male, Palpable Lump on Left Breast

50-year-old male presents with palpable lump on the left breast.

David A. Dowe, MD


Coronary CTA really works, but why isn't its use soaring?

Coronary CT angiography came of age in the last decade. This occurred because CT technology moved into the 16- and 64- detector era.

David A. Stringer, MBBS, FRCR, FRCPC


64-slice CT passes pediatric safety tests

X-ray radiation exposure and sedation protocols must be considered when imaging children with CT

David Cano, M.D


MSCT moves ahead of DSA for peripheral arterial disease

Peripheral arterial occlusive disease is a chronic and progressive disease that is common in the Western world.

David Dowe, MD


Demands of cardiac CTA defy oversimplification

Giving radiologists only noncardiac portion of exams ignores value that they bring to CT.

David E. Allie, MD


CTA revolutionizes treatment of peripheral vascular disease

We continue to be both amazed and intrigued by the hype showered on cardiac CT angiography and the corresponding lack of hype given to peripheral vascular CTA. No doubt, 64-slice cardiac or coronary CTA is potentially a revolutionizing technology, but PV-CTA has already revolutionized the comprehensive diagnosis and treatment of peripheral vascular disease.

David F. Yankelevitz, MD


'Conflicting' CT lung trial data can be explained

In the past few months, results of two studies evaluating CT screening for lung cancer have been published in prestigious medical journals, both getting enormous amounts of coverage in the lay press.

David Fisher


Prepare For the New X-Ray Differential Payment Policy

How radiology departments can prepare for new legislation regarding X-ray technology.

David Fuhriman, MBA


10 Questions with Tessa Cook, MD, PhD

In this series, 10 Questions, we ask the same questions to a diverse group of professionals who work in medical imaging. Taking a cue from Twitter, we’ve limited each respondent’s answers to 140 characters.

David Hirschorn, MD


2D PACS has had its day in the sun, now 3D PACS is moving in

For the past 15 years, most PACS have performed the basic tasks of taking in images, archiving them, sending them to workstations for display, and hopefully not losing them.

David Hunte, MS-IV


Aberrant ICA

A 57-year-old female presents to the emergency department with dysphagia and reports her throat is “closing up.” On physical exam, there are no palpable masses appreciated along the neck, and the thyroid descends along the midline on swallowing and is noted to be slightly enlarged.

David Jacobs, MD


Gallstone Ileus

A 70-year-old patient recently presented to an emergency department with a history of abdominal distention, pain and brownish emesis.

David L. Weiss, MD


Switch to digital mammography demands intensive planning

Congratulations! You've just received budget approval for full-field digital mammography. But before you begin the process of purchasing and installing your new system, you have a bit of preliminary work to do.

David P. Naidich, MD


Dual-energy CT makes inroads in aortic and pulmonary studies

Conventional single-energy CT imaging results in an anatomic depiction of the imaged area based on depiction of differences in physical density. Dual-energy CT imaging differentiates structures of a similar density with different elemental compositions based on differing attenuations at different photon energies. Hence, dual-energy imaging moves away from imaging density toward imaging elemental, or possibly even chemical, composition (see accompanying article).

David R. Carson


National standards group tackles workstation design

Soft-copy reading rooms present unique challenges to designers of specialized PACS furniture. Multiple monitors and keyboards and

David Thomasson, PhD


Dynamic contrast-enhanced MR imaging finally comes of age

Tumors require new blood vessels in order to grow beyond a few millimeters in size. Once this "angiogenic switch" is thrown, a series of events occur that lead to the progression and spread of cancer. The vessels formed by tumors are not only larger and more numerous but also more permeable than normal vessels1 (Figure 1). Thus, when a patient with a tumor is injected with a gadolinium-chelate MR contrast agent, the tumor enhances more than the surrounding normal tissue.

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