Half-value layer (HVL) definition

Half-value layer (HVL) means the thickness of specified material which attenuates the beam of radiation to an extent such that the exposure rate is reduced to one-half of its original value. In this definition the contribution of all scattered radiation, other than any which might be present initially in the beam concerned, is deemed to be excluded.

Half-value layer (HVL) means the thickness of a specified material which attenuates X-radiation or gamma radiation to an extent such that the air kerma rate, exposure rate or absorbed dose rate is reduced to one-half of the value measured without the material at the same point.

Half-value layer (HVL) means the thickness of a specified material which attenuates X-radiation or gamma radiation to an extent such that the air kerma rate, exposure rate or absorbed dose rate is reduced to one-half of the value measured without the material at the same point. The contribution of all scattered radiation, other than any which might be present initially in the beam concerned, is deemed to be excluded.

Examples of Half-value layer (HVL) in a sentence

• Half-value layer (HVL)" means the thickness of specified material which attenuates the beam of radiation to an extent such that the AKR is reduced by one-half of its original value.

• Half-value layer (HVL) means the thickness of specified material which attenuates the beam of radiation to an extent that the exposure rate is reduced to ½ of its original value.

• Half-value layer (HVL) means the thickness of specified material which attenuates the beam of radiation to an extent that the exposure rate is reduced to 2 of its original value.

• Half-value layer (HVL)" means the thickness of specified material which attenuates the beam of radiation to an extent such that the exposure rate is reduced to one-half of its original value.

• Half-value layer (HVL), tenth-value layer (TVL), and mean free path (mfp) are the additional para- meters that are calculated for gamma-ray shielding.

More Definitions of Half-value layer (HVL)

Half-value layer (HVL) means the thickness of specified material which attenuates the beam of radiation to an extent such that the AKR is reduced by one-half of its original value.

Half-value layer (HVL) means the thickness of specified material which, when introduced into the beam of a given path of radiation, reduces the exposure rate by one-half. In this definition, the contribution of all scattered radiation, other than any which might be present initially in the beam concerned, is deemed to be excluded.

Half-value layer (HVL) means the thickness of a specified material which attenuates X-radiation or

Half-value layer (HVL) means the thickness of a specified substance which, when introduced into the path of a given beam of radiation, reduces the exposure rate by one-half. HVL is a measure of beam quality and is usually specified in millimeters of aluminum for diagnostic units.

Half-value layer (HVL) means the thickness of absorber required to reduce a beam of radiation to one-half (½) its incident exposure rate.

Half-value layer (HVL) means the thickness of an absorber required to attenuate the incident radiation to half the original intensity; (16)

Half-value layer (HVL) means the thickness of a specified material which attenuates xX-radiation