HRT


Also found in: Dictionary, Thesaurus, Acronyms, Encyclopedia, Wikipedia.

HRT

Abbreviation for hormone replacement therapy.

HRT

abbr.
hormone replacement therapy

HRT

Hormone replacement therapy, see there.

HRT

Abbreviation for hormone replacement therapy.

hormone replacement therapy

,

HRT

The administration of supplemental conjugated estrogen and progestin to treat hormonal deficiency states, relieve menopausal vasomotor symptoms, and manage postmenopausal atrophic vaginitis. It may also be used, with caution, as adjunctive therapy for osteoporosis. HRT may increase a woman’s risk of dying from heart disease, pulmonary embolism, stroke, and breast and endometrial cancers.

tomography

(to-mog'ra-fe) [ tomo- + -graphy]
A radiographic technique that selects a level in the body and blurs out structures above and below that plane, leaving a clear image of the selected anatomy. This is accomplished by moving the x-ray tube in the opposite direction from the imaging device around a stationary fulcrum defining the plane of interest. Tube movements can be linear, curvilinear, circular, elliptical, figure eight, hypocycloidal, or trispiral. With the exception of renal tomography most tomographic procedures have been replaced by computed tomography (CT). Synonym: body section radiography; body section roentgenography

computed axial tomography

Abbreviation: CAT
See: computed tomography

computed tomography

Abbreviation: CT
A computerized x-ray scanning system that produces a sectional anatomic image. It is achieved by digital processing of x-ray attenuation coefficients from a 360° wedge scan of ionizing radiation. There is considerable use of data from the attenuation coefficients in diagnosis. Computed tomography is colloquially called a cat scan.

CAUTION!

CT scans expose patients to radiation on the order of 10 mSv per scan. Educational materials about the potential risks and benefits of scanning should be provided to patients to ensure that scans are performed safely and carefully.

computerized axial tomography

Abbreviation: CAT
See: computed tomography

electrical impedance tomography

Cross-sectional body imaging that reconstructs pictures of internal organs based on measurements of their electrical activity as detected by electrodes placed on the surface of the body.

electron-beam tomography

Ultrafast computed tomography

full body computed tomography

Abbreviation: FBCT
An examination from head to toe of the body with computed tomographic imaging, promoted as a screening test for cancer and other illnesses.

CAUTION!

The test exposes patients to high levels of radiation, reveals more false positive findings than true positives, and is expensive.

Heidelberg retinal tomography

Abbreviation: HRT
A confocal laser scanning system that produces three-dimensional images of the posterior segment of the eye. It is used to diagnose and treat glaucoma.

helical computed tomography

Computed tomographic (CT) images that are obtained as the CT table moves continuously during a single, held breath. Detailed evaluation of dynamic internal features is feasible with this technique.
Synonym: spiral computed tomography

optical coherence tomography

Abbreviation: OCT
A radiographical method used to obtain high-resolution cross-sectional images of tissues and their defects, e.g., of the structures of the eye.

panoramic tomography

Zonography.
Enlarge picture
POSITRON EMISSION TOMOGRAPHY: PET SCAN revealing lung cancer
Enlarge picture
PET SCAN OF BRAIN

positron emission tomography

Abbreviation: PET
Reconstruction of brain sections by using positron-emitting radionuclides. By using several different radionuclides, researchers can measure regional cerebral blood flow, blood volume, oxygen uptake, and glucose transport and metabolism, and can locate neurotransmitter receptors. PET has been used with fludeoxyglucose F 18 to identify and localize regional lymph node metastases and to help assess response to therapy.

The images produced by PET are in colors that indicate the degree of metabolism or blood flow. The highest rates appear red, those lower appear yellow, then green, and the lowest rates appear blue. The images in various disease states may then be compared to those of normal subjects. Three- and four-dimensional reconstructions are often achieved through the use of computed tomography (CT) with the same machine. See: illustration

illustration

quantitative computed tomography

Abbreviation: QCT
A method for determining the bone mineral density of a three-dimensional bony specimen, e.g., in the vertebral bodies or the forearms. It is used in the diagnosis of osteopenia and osteoporosis.

single photon emission computed tomography

Abbreviation: SPET, SPECT
A medical imaging method for reconstructing sectional images of radiotracer distributions.
See: nuclear medicine scanning test; positron emission tomography

spiral computed tomography

Helical computed tomography.

ultrafast computed tomography

Computed tomographic scanning that produces images by rotating the x-ray beam at targets placed around a patient, instead of moving a patient on a gantry through the scanner. The technique minimizes patient movement artifacts and decreases scanning times to about 50 to 100 msec. It is capable of providing good resolution of vascular structures, such as the aorta and the coronary arteries. Synonym: electron-beam tomography

xenon-enhanced computed tomography

Computed tomographic scanning that uses the inert gas xenon to improve the visual distinction between healthy and abnormal tissues, esp. to visualize blood flow to different regions of the brain in stroke.

Heidelberg retinal tomography

Abbreviation: HRT
A confocal laser scanning system that produces three-dimensional images of the posterior segment of the eye. It is used to diagnose and treat glaucoma.
See also: tomography

HRT

Abbrev. for HORMONE REPLACEMENT THERAPY.

Hormone replacement therapy (HRT)

Also called estrogen replacement therapy, this controversial treatment is used to relieve the discomforts of menopause. Estrogen and another female hormone, progesterone, are usually taken together to replace the estrogen no longer made by the body.

HRT

hormone replacement therapy

HRT

hormone replacement therapy
References in periodicals archive ?
WHI constitutes the first mass-scale controlled trial to address the long-term risks and benefits associated with HRT use for healthy women.
The authors of the study concluded that women treated with long term HRT early after menopause "had significantly reduced risk of mortality, heart failure, or myocardial infarction [heart attack], without any apparent increase of cancer, venous thromboembolisms [DVT] or stroke.
If you are considering starting or stopping HRT, or using it for a long time, you should discuss it with your doctor.
HRT appears to raise the combined risk of womb, breast and ovarian cancer by 63 per cent, according to the Million Women Study, which has surveyed nearly a quarter of women aged 50-64 in the UK.
It is particularly important for women on HRT to have regular mammograms and get medical advice if they notice anything about their breasts that is not normal for them," she adds.
Guidance issued by the Committee on Safety of Medicines and its expert working group on HRT to prescribers and women stress the importance of using the lowest possible dose of HRT for the shortest possible time.
After 3 years of treatment, the increase in bone mineral density was greatest among the those treated with both HRT and alendronate.
A HRT is highly effective in treating certain menopausal symptoms and may still be appropriate for you, depending on your circumstances.
Expert panel unsure of HRT benefits for conditions other than menopause," The Lancet, April 27, 2002.
Some forms of HRT provide oestrogen alone, often prescribed to women without a womb, others provide combinations of oestrogen and progesterone, levels of which are also affected by the menopause.
Without the HRT I worried about my risk for heart disease and osteoporosis.
Susan Love, 49, a breast cancer surgeon and adjunct associate professor of clinical surgery at the University of California, Los Angeles, in the newly released ``Susan Love's Hormone Book'' paints a grim picture of the diseases HRT might cause - including increased risk of breast, ovarian, lung and skin cancer, gallbladder problems, blood clots, endometriosis, lupus and asthma.