mean marrow dose

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mean marrow dose (MMD)

the estimated average annual somatic radiation received by each person in the United States. The figure is 77 mrad and represents a weighted average for people exposed to radiation and those not exposed during the period. It is expressed in terms of bone marrow because irradiation of that tissue is assumed to be a cause of leukemia.

mean marrow dose

Abbreviation: MMD
An estimated measure of average radiation exposure given to the blood-forming progenitor cells of the bone marrow, e.g., in whole body radiation treatment. The percentage of active bone marrow in the useful beam is multiplied by the average absorbed dose.
See also: dose
References in periodicals archive ?
What is the internal consistency of the MMD for Jewish- and Arab-Israeli children aged 4 to 7 years and their parents when examined as pooled and separate samples?
There are numerous differences in the clinical manifestations of MMD between young children and adults.
But that could be an uphill battle, especially as Chiluba will remain MMD chairman, calling the shots from behind the scenes, like the unseen puppet master.
MMD varies greatly in severity, even within the same family.
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First reported in 1957 in Japan, MMD soon spread worldwide.
In his place, the MMD has Levy Mwanawasa who, according to the current mood of the country, will be given a good run for his money by the leading opposition candidate, the former vice president and retired general, Christon Tembo.
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Reach 2013 provided us a great platform to celebrate our progress and extend our application to all the Philips channel partners," said Suchit Kumar, Sales Vice President for MEA and Central Asia, MMD.