Microdosimetry
A technique for measuring the microscopic distribution of energy, useful with different types of radiation.
Microdosimetry provides the scientific underpinnings for the measurement of radiation. It is vitally important to both radiation therapy and radiation protection.
The prefix “micro-” is derived from the Greek “mikros” meaning small. It diminishes whatever it precedes.
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- Microduplication 22q11.2 syndrome
A syndrome due to duplication of a tiny part of chromosome band 22q11.2. Features of the syndrome include the appearance of widely spaced eyes and superior placement of eyebrows; downslanting palpebral fissures (eye slits); mild micrognathia (small chin) and retrognathia (recessed chin); and a long, narrow face. The microduplication arises because chromosome band 22q11.2 is […]
- Microembolus
An embolus of microscopic size. For example, a tiny blood clot or little clump of bacteria. Like any embolus, it travels through the bloodstream, lodges in a blood vessel and blocks it.
- Microhematuria
Hematuria means blood in the urine and microhematuria refers to hematuria that is visible only under a microscope. There is so little blood that it cannot be seen without magnification. Microhematuria is in contrast to gross hematuria in which the blood is so plentiful that it is visible grossly with merely the naked eye. Hematuria, […]
- Microorchidism
Abnormally small testes. To determine if the testes are too small, a device called an orchidometer is used that permits the testes to be compared to a series of plastic ovals (like miniature American footballs) of differing sizes. Microorchidism is a diagnostic feature, for example, of the Prader-Willi syndrome and certain other multiple malformation syndromes. […]
- Micropenis
An abnormally small penis. In medical practice, the dimension of the penis that is measured is the length. This measurement is taken along the upper surface of the shaft of the penis to the tip, using a measuring tape or, preferably, a ruler. The ruler is pressed firmly into the soft tissue over the pubic […]