Dosimetry (Radiation)
Pronunciation: doh-SIM-ih-tree
The measurement and calculation of absorbed radiation dose received by patients or staff during radiographic procedures, expressed in units such as microsieverts (μSv) or milligrays (mGy).
Full Definition
Radiation dosimetry in dental radiology involves the systematic measurement or calculation of the radiation dose delivered to patients and personnel. Dosimetric quantities relevant to dental practice include absorbed dose (Gy), equivalent dose (Sv), and effective dose (Sv), the last of which accounts for the radiosensitivity of different tissues and is used for comparing the risk associated with different imaging modalities. Personal dosimeters (such as thermoluminescent dosimeters or optically stimulated luminescence devices) are worn by clinical staff to monitor occupational dose. Editors should note that 'dose' alone is ambiguous without specifying the quantity; 'effective dose' should be used when comparing patient risk across modalities.
Usage
Usage note: Specify the dosimetric quantity whenever 'dose' is used (e.g., effective dose, absorbed dose). Avoid 'radiation dosage,' which is a common error — 'dosage' applies to drugs, not radiation.
In Context
- "Radiation dosimetry studies indicate that the effective dose from a full-mouth series of periapical radiographs is approximately 170 μSv." — Comparative radiology research article
- "Personal dosimetry badges worn by dental radiographers must be assessed at regular intervals and records retained as required by IRR." — Radiation protection policy document