PubMed · 14533320
The source did not provide an abstract. Follow the original record for more information.
Explore connections, maps & timelines
Barium swallow.. https://pubmed.ncbi.nlm.nih.gov/14533320/
Cite the original work for its findings. Save a collection to share your selection of sources.
KEEP EXPLORING
It is important to compare different contrast media used in bone cement according to their ability to attenuate X-rays and thereby produce image contrast between bone cement and its surroundings in clinical applications. The radiopacity of bone cement is often evaluated by making radiographs of cement in air at an X-ray tube voltage of 40 kV. We have developed a method for ranking contrast media in bone cement simulating the clinical situation, by (1) choosing the same X-ray tube voltage as used in clinical work, and (2) using a water phantom to imitate the effects of the patients' soft tissue on the X-ray photons. In clinical work it is desirable to have low radiation dose, but high image contrast. The voltage chosen is a compromise, because both dose and image contrast decrease with higher voltage. Three contrast media (ZrO(2), BaSO(4), and Iodixanol) have been compared for degree of "image contrast." Comparing 10 wt % contrast media samples at an X-ray tube voltage of 40 kV, ZrO(2) produced higher image contrast than the other media. However, at 80 kV, using a water phantom, the results were reversed, ZrO(2) produced lower image contrast than both BaSO(4) and Iodixanol. We conclude that evaluations of contrast media should be made with voltages and phantoms imitating the clinical application.
We report an unusual case of a 10-month-old girl who developed partial small-bowel obstruction caused by an intraluminal hematoma within the terminal ileum. Passage of bright red blood through her rectum prompted radiologic evaluation with computed tomography, barium enema, and ultrasound. These revealed an avascular right lower-quadrant mass within the lumen of the terminal ileum. An exploratory laparotomy was performed, and a large obstructing hematoma was removed.
Explore the source record for details and available documents.