Biomaterial Database

Comparison of absorbed radiation doses in barium and air enema reduction of intussusception: a phantom study. 1996

J Persliden, and P Schuwert, and W Mortensson

Department of Radiation Physics, Faculty of Health Science, Linköping University, Linköping, Sweden.

OBJECTIVE We assessed the relative radiation load in patients undergoing hydrostatic and pneumatic reduction of childhood intussusception. METHODS In a phantom study we simulated two situations occurring during reduction of intussusception. The absorbed radiation dose was measured at several positions in the phantom using either barium sulphate (BaSO4) or air in the simulated reduction, combined with either automatic exposure control (AEC) or constant exposure rate (CER) at fluoroscopy. From these values the mean absorbed dose was calculated for different depth compartments within the phantom. RESULTS In the barium study the mean absorbed dose averaged over the total irradiated volume was 14-23 % lower when CER was used instead of AEC; in the air study the dose was 35-43 % lower when AEC was used instead of CER. The combination of air and AEC provided the lowest mean absorbed dose in the tissue. The barium enema created a low-radiation zone, which might be utilized for protecting radiation sensitive tissue. CONCLUSIONS The use of BaSO4 or air in reduction of intussusception requires the proper combination with CER and AEC, respectively, to minimize the radiation load to the patient; the lowest radiation load is obtained by using air and AEC.

UI	MeSH Term	Description	Entries
D007223	Infant	A child between 1 and 23 months of age.	Infants
D007443	Intussusception	A form of intestinal obstruction caused by the PROLAPSE of a part of the intestine into the adjoining intestinal lumen. There are four types: colic, involving segments of the LARGE INTESTINE; enteric, involving only the SMALL INTESTINE; ileocecal, in which the ILEOCECAL VALVE prolapses into the CECUM, drawing the ILEUM along with it; and ileocolic, in which the ileum prolapses through the ileocecal valve into the COLON.	Invagination, Intestinal,Intususception,Intestinal Invagination,Intestinal Invaginations,Intussusceptions,Intususceptions,Invaginations, Intestinal
D011829	Radiation Dosage	The amount of radiation energy that is deposited in a unit mass of material, such as tissues of plants or animal. In RADIOTHERAPY, radiation dosage is expressed in gray units (Gy). In RADIOLOGIC HEALTH, the dosage is expressed by the product of absorbed dose (Gy) and quality factor (a function of linear energy transfer), and is called radiation dose equivalent in sievert units (Sv).	Sievert Units,Dosage, Radiation,Gray Units,Gy Radiation,Sv Radiation Dose Equivalent,Dosages, Radiation,Radiation Dosages,Units, Gray,Units, Sievert
D004733	Enema	Insertion of a solution or compound through the RECTUM with the purpose of cleansing the COLON or for diagnostic procedures.	Enemata,Enemas,Enematas
D005471	Fluoroscopy	Production of an image when x-rays strike a fluorescent screen.	Fluoroscopies
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000005	Abdomen	That portion of the body that lies between the THORAX and the PELVIS.	Abdomens
D000042	Absorption	The physical or physiological processes by which substances, tissue, cells, etc. take up or take in other substances or energy.
D000388	Air	The mixture of gases present in the earth's atmosphere consisting of oxygen, nitrogen, carbon dioxide, and small amounts of other gases.
D001466	Barium Sulfate	A compound used as an x-ray contrast medium that occurs in nature as the mineral barite. It is also used in various manufacturing applications and mixed into heavy concrete to serve as a radiation shield.	Barite,Baritop,Barium Sulfate (2:1),E-Z-CAT,Micropaque Oral,E Z CAT,EZCAT,Sulfate, Barium