Pertinent findings on a normal neonatal chest X ray The appearance of the thymus is variable. The “sail” sign refers to the thymus creating a triangular shadow of soft tissue along the mediastinal border on chest x-ray. Always check for the side of the aortic arch (normally left sided); this may be difficult to do …
Pertinent findings on a normal neonatal chest X ray Read More »
Correct location of umbilical arterial and venous catheters on X rays The umbilical arterial catheter (UAC) should terminate below the L3 vertebra or at the level of the T6 through T9 vertebrae to prevent catheter occlusion of branch vessels arising from the aorta. The umbilical venous catheter (UVC) should terminate at the inferior cavoatrial junction; …
Correct location of umbilical arterial and venous catheters on X rays Read More »
histologic stages of lung development The lung bud progressively branches during embryologic development, undergoing a pseudoglandular stage (weeks 5 to 17), a canalicular stage (weeks 16 to 25), a terminal sac stage (weeks 25 to 40), and an alveolar stage that begins late in fetal life and continues until approximately 8 years of age.
What is the embryologic relationship between the lungs and the gastrointestinal tract? The lung bud is an outpouching of the primitive foregut, appearing during the fourth week of development.
What are some commonly used radiopharmaceutical therapies? Here is the table which lists some of the most common currently available radiopharmaceuticals as well as their approval status in the US. Selected Therapeutic Radiopharmaceuticals RADIOPHARMACEUTICAL ISOTOPE PRIMARY EMISSION(S) HALF-LIFE ROUTE OF ADMINISTRATION INDICATION US STATUS Iodine-131 sodium iodide 131 I BetaGamma 8 days Oral Thyroid disease (thyroid cancer …
How are radiopharmaceutical doses determined? Several methods of determining prescribed dose exist and are used depending on the radiopharmaceutical in question and the disease being treated. These include: • Flat doses : For example, ablation of the thyroid remnant in a patient who had a thyroidectomy for thyroid cancer is sometimes treated with a flat dose of …
What are radiation safety precautions? The final potential adverse effect of radiopharmaceutical therapy to be discussed is the effect on persons other than the treated patient. Because the source of radiation is given directly to the patient, it is possible for some dose to be delivered to members of the public. This is most commonly …