Philips Azurion - Page 387

Legend
3 Isocenter 6 Detector dose
Air Kerma (AK)
The amoun
t of kinec energy released in air by ionizing radiaon. Or more precisely, the quoent of
dEtr by dm, where dEtr is the sum of the inial kinec energies of all the charged parcles liberated by
uncharged parcles in a mass of dm of air (see IEC 60601-1-3:2008, 3.4 and ICRU 60 (1998)). It is
expressed in mGy, where 1 Gy = 1 Joule / kg (see IEC 60601-2-43:2010, 203.6.4.5).
Air Kerma Rate
The amount of air kerma per unit of me, expressed in mGy/min (see IEC 60601-2-43:2010, 203.6.4.5).
Reference Air Kerma
The air kerma free in air in the primary X-ray beam measured under specic condions as specied in
Reference Air Kerma Measurement Setup (page 311), and expressed in the paent entrance reference
point (see IEC 60601-1-3:2008, 3.70).
NOTE The reference air kerma value is independent of the actual posion of the paent, for
example, the table height, as it is measured at a specic point in space.
For exposure, the reference air kerma is expressed in mGy per image.
Reference Air Kerma Rate
The amount of reference air kerma per unit of me. For uoroscopy the reference air kerma Rate is
expressed in mGy/min.
Peak Air Kerma
The highest air kerma that any point of an irradiated surface is exposed to.
Skin Dose
The absorbed dose delivered by ionizing radiaon to the paent's skin at the point of irradiaon. Skin
dose is expressed in Gy or mGy. Unlike the reference air kerma, this value indicates the actual energy
absorpon under the present condions.
Skin Dose Rate
The skin dose per unit of me, expressed in Gy/s or mGy/s.
Peak Skin Dose
The highest skin dose that any poron of the paent’s skin is exposed to.
Sta Dose
Sta dose is the eecve dose received by a healthcare professional during an examinaon, resulng
primarily from scaer radiaon emied by the paent. The eecve dose is expressed in unit mSv
(milliSievert).
Dose Area Product
The product of the area of a cross-secon of an X-ray beam and the averaged air kerma over that cross-
secon, expressed in mGy∙cm
2
(see IEC 60601-2-54:2009, 201.3.203 and IEC 60601-2-43:2010,
203.6.4.5).
Unlike the skin dose and air kerma, the DAP value is independent of the distance to the focal spot.
Glossary Denions
Azurion Release 1.2 Ins
trucons for Use 387 Philips Healthcare 4522 203 52421