Quantcast
Section II. Composition of X-Ray - X-Ray Film Processing

Share on Google+Share on FacebookShare on LinkedInShare on TwitterShare on DiggShare on Stumble Upon
Custom Search
 
  
 
1-2.
GENERAL
X-ray film must be characteristically different from film used in photography, since
x-ray exposure is different from light exposure. Because of its importance to medicine,
x-ray film is manufactured with consistent uniformity and quality, which facilitates
standardization of exposure and processing.
Section II. COMPOSITION OF X-RAY FILM
1-3.
CHEMICAL COMPONENTS OF FILM
In general, x-ray film is a double-emulsion film consisting of a transparent base
with adhesive subcoating, sensitized emulsion, and protective coating on both surfaces
(figure 1-2).
Figure 1-2. Magnified cross-section of x-ray film.
a. Film Base. The film base supports the emulsion and provides the correct
degree of stiffness for handling purposes. It is composed of either cellulose acetate or
polyester, both of which are transparent and blue-tinted.
(1)  Cellulose acetate. Dissolving cotton in acetic acid makes cellulose
acetate. The cotton cellulose combines with the acid to form cellulose acetate, which is
then dissolved in a volatile solvent containing blue dye. The solution of cellulose
acetate is poured onto huge heated drums where it solidifies to a thickness of about
0.008 inch. Cellulose acetate does have a tendency to become saturated with liquids
during processing, which results in frequent problems in automatic processors.
(2)  Polyester. The polyester base is made by "cracking" crude oil forming
the substance parazylene. When this substance is mixed with methyl alcohol and other
chemicals, a product of dimethyl-terebthalate (DMT) is formed. This DMT is one-half of
MD0954
1-3



Medical News
Research explores health care support for young adults with ASD
How difficult would it be to abruptly be plopped down...
medicalxpress.com
Evidence points to potential benefits of polypill for heart health
(Medical Xpress)—Taking one pill instead of three could be a...
medicalxpress.com
Saudi Arabia reports three more deaths from MERS virus
Saudi Arabia's health ministry says three more patients who contracted...
medicalxpress.com
Study finds codeine often prescribed to children, despite available alternatives
Despite its potentially harmful effects in children, codeine continues to...
medicalxpress.com
Make the Diagnosis: Itchy rash
(MedPage Today) -- A previously healthy 24-year-old student developed sharp...
medpagetoday.com
AMA examines economic impact of physicians
(HealthDay)—Physicians who mainly engage in patient care contribute a total...
medicalxpress.com
Less-schooled whites lose longevity, study finds
Barbara Gentry slowly shifts her heavy frame out of a...
medicalxpress.com
How to keep your fitness goals on track
(HealthDay)—The New Year's resolutions many made to get fit have...
medicalxpress.com
Low tolerance for pain? The reason may be in your genes
Researchers may have identified key genes linked to why some...
medicalxpress.com
Navy OKs changes for submariners' sleep schedules
The U.S. Navy has endorsed changes to submarine sailors' schedules...
medicalxpress.com
10 Questions: Dave Mittman, PA
(MedPage Today) -- How can medical professionals avoid burnout? Be...
medpagetoday.com
HTN Guidance Takes Center Stage at NKF
(MedPage Today) -- Guidelines on hypertension management, particularly the recent...
medpagetoday.com
Team identifies source of most cases of invasive bladder cancer
A single type of cell in the lining of the...
medicalxpress.com
Researchers uncover link between Down syndrome and leukemia
Although doctors have long known that people with Down syndrome...
medicalxpress.com
'Chaperone' compounds offer new approach to Alzheimer's treatment
A team of researchers from Columbia University Medical Center (CUMC),...
medicalxpress.com
Cancer stem cells linked to drug resistance
Most drugs used to treat lung, breast and pancreatic cancers...
medicalxpress.com
Improving newborns' bacterial environment could fend off infections, animal study suggests
Mothers give a newborn baby a gift of germs—germs that...
medicalxpress.com
How To Get Medicare To Cover A Spa Trip
(MedPage Today) -- Good news for doctors who think their...
medpagetoday.com
Biggest Insurer Shocked with Hep C Costs
(MedPage Today) -- UnitedHealth Group spent $100 million on hepatitis...
medpagetoday.com
The WeekAhead: NKF, SGIM, and JAMA Does Neurology
(MedPage Today) -- This week MedPage Today staff head to...
medpagetoday.com
   


Privacy Statement - Copyright Information. - Contact Us

comments powered by Disqus

Integrated Publishing, Inc.
9438 US Hwy 19N #311 Port Richey, FL 34668

Phone For Parts Inquiries: (727) 755-3260
Google +