Table 1 Quantities suitable for setting diagnostic reference levels (DRLs) ICRP-135 [4]
From: Dosimetric quantities and effective dose in medical imaging: a summary for medical doctors
Image modality | Recommended quantity | Recommended unit |
|---|---|---|
Radiography | Entrance-surface air kerma (Ka,e) or Kerma-Area Product (PKA) | mGy or mGy.cm2 |
Mammography | Mean glandular dose (DG) or “average glandular dose” (AGD) and Ka,i (incident air kerma) or Ka,e | mGy |
Interventional fluoroscopy | kerma-Area Product (PKA) and air-kerma at the patient entrance reference point (Ka,r) | Gy.cm2 and mGy |
Computed tomography | CTDIvol (computed tomography dose index) and Dose Length Product (DLP) | mGy and mGy cm |
Nuclear medicine | Administered activity | MBq |