lumen-, lumin-, lum-
(Latin: light, shine; torch, lamp; heavenly body)
The sonoluminescent bubbles in the thick liquid in the test tube appeared like bright and instant glowing brilliances that quickly disappeared.
2. Pertaining to speeds faster than that of shining machines: As a child, Priscilla was always puzzled that she could see jet planes in the sky long before she could hear the roaring sounds of their motors; later, she learned that the loud noises were not superluminal sounds because they were never able to be heard before they could be seen.
By measuring the amount of thermoluminescent gleaming that is given off, the duration of exposure to radiation can be determined; so, it has been used to determine the age of various minerals and archaeological artifacts.
Because of her work in the X-ray department at the hospital, Ms. Smith frequently used the thermoluminescent dosimetry device to ensure that she remained uncontaminated by the radioactive emissions.2. The determination of the amount of lucidity to which a material has been exposed: Usually thermoluminescent dosimetry is accomplished by heating the material in a specially designed instrument which relates the amount of luminescence coming from the material to the amount of exposure.
Ionizing radiation; such as, x rays, alpha rays, beta rays, and gamma rays, remains undetectable by the senses, and the damage it causes to the body is cumulative, depending on the total dosage of thermoluminescent dosimetry received.
Dr. Jonas used the thermoluminescent dosimetry concept to obtain an estimation of the amount of radioactive elements to which the X-ray staff might have received.
The examination may also be transilluminated on breast tissue to detect lesions and cysts.
In newborns, a bright halogen ray may be used to transilluminate the chest cavity if they are suspected of having a pneumothorax.
Transilluminating through the chest is only possible on small newborns.
Bodily areas filled with air or fluid, that is not normal to that location, have increased lucid transmission and so they should not be transilluminated.
In a darkened room, a newborn infant's head can be seen to shine brightly when transilluminated if there is excess fluid present; thus, suggesting hydrocephalus or an abnormal buildup of cerebrospinal fluid (CSF) in the ventricles of the brain.
One of a range of new digital technologies that is helping to improve diagnostic techniques is the "Difoti" (digital imaging fiber optic transillumination). One application of the "Difoti" is when dentists position a wand or thin stick-like instrument above each tooth and as light passes through the enamel, any cavities or other irregularities show the patterns and the information is captured by the wand’s sensor and transmitted to a display.
Etymologically related "light, shine, glow" word families: ethero-; fulg-; luco-; luna, luni-; lustr-; phengo-; pheno-; phospho-; photo-; scinti-, scintill-; splendo-.