Posts Tagged ‘smaller’

Noninvasive Diagnostic Imaging Utilization Rates For The Medicare Population Vary Geographically

The utilization rates of noninvasive diagnostic imaging procedures such as computed tomography (CT) scans, magnetic resonance imaging (MRI), and positron emission tomography (PET) for the Medicare population vary substantially from region to region, with Atlanta, GA, having the highest utilization rate and Seattle, WA, having the lowest, according to a [...]

Energetic Quanta: Gamma-Rays

Energetic Quanta: Gamma-Rays

Gamma rays…

Are emitted from the nucleus to trim excess energy.
Tend to carry higher energies than X-rays, but this does not have to be the case

For example, after a larger energy decay particle (e.g. a beta particle) is emitted, the nucleus may still be slightly unstable (i.e., the atom [...]

Energetic Quanta: Beta Particles

Energetic Quanta: Beta Particles

Beta Particles…

Are smaller (1/2000 the size of proton) and less energetic than alpha particles
Have negative charge
Are created when a neutron transmutates into a proton
Are emitted during decay of iodine-131, phosphorus-32, carbon-14, and strontium-90

Ultrasound lectures 11 (Nephrolithiasis)

Nephrolithiasis
Clinical
Nephrolithiasis has its highest prevalence in men aged 20-40 years. Approximately 12% of men and 5% of women experience renal colic caused by stone disease at least once in their lifetimes. Most renal stone disease is idiopathic. Patients usually present with flank plain radiating to the genitals, nausea, vomiting, [...]

Ultrasound lectures 8 (Abdominal Aortic Aneurysm)

AAA (Abdominal Aortic Aneurysm)
Clinical
Approximately 90-95% of abdominal aortic aneurysms (AAA) are confined to the infrarenal aorta. AAA are usually not repaired until they exceed 4-5 cm in maximum diameter. The risk of rupture within 5 years is 25% at 5 cm diameter. AAA smaller than 5 cm have a a3% risk [...]

Focal Nodular Hyperplasia: Morphologic and Functional Information from MR Imaging with Gadobenate Dimeglumine

Focal Nodular Hyperplasia: Morphologic and Functional Information from MR Imaging with Gadobenate Dimeglumine1

Luigi Grazioli, MD,
Giovanni Morana, MD,
Michael P. Federle, MD,
Giuseppe Brancatelli, MD,
Marco Testoni, MD,
Miles A. Kirchin, PhD,
Katiuscia Menni, MD,
Lucio Olivetti, MD,
Nicola Nicoli, MD and
Carlo Procacci, MD

+ Author Affiliations

1From the Department of Radiology, University of Brescia, Spedali Civili di Brescia, Piazzale Spedali Civili 1, 25023 Brescia, [...]

spleen

The Spleen
• Imaging techniques
• Normal anatomy
• Splenomegaly
• Malignant mass lesions
• Splenic infection
• Splenic trauma
• Other splenic disorders
IMAGING TECHNIQUES
Plain radiography is not routinely used in the evaluation of [...]

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