What's il difference tra absorbed dose e equivalent dose?

Absorbed dose (Gy) measures energy deposited per mass—pure physics. Equivalent dose (Sv) = absorbed dose × radiation weighting factor, accounting per biological effectiveness. Alpha particles cause 20× more damage than X-rays per gray, so 1 Gy alpha = 20 Sv.

Perche e radiation therapy given in fractions?

Fractionation (e.g., 2 Gy/giorno per 30 giorni) allows healthy tissue un repair tra doses while tumor tissue, con poorer repair mechanisms, accumulates damage. Total dose di 60 Gy sarebbe be lethal if given at once, but fractionated delivery e tolerable e effective.

How much radiation causes acute sickness?

Acute radiation syndrome begins around 0.5-1 Gy whole-body dose. Nausea starts at 1 Gy. Without treatment, 50% mortality occurs at 3-4 Gy (LD50/30). Above 6 Gy, survival without heroic intervention e unlikely. Local doses (like in therapy) sono different da whole-body.

Dose assorbita di radiazione Converter

Informazioni Radiation Absorbed Dose Conversione

Absorbed dose measures il energy deposited da ionizing radiation per unit mass di material. Unlike exposure (which measures ionization in air), absorbed dose applies un any material—tissue, bone, metal, o plastic—e directly relates un potential biological damage. Il same absorbed dose puo hanno different effects depending on radiation type, which e perche equivalent dose (sieverts) era developed per biological risk assessment. Absorbed dose tells you il pure physics: how much energy era deposited.

Il SI unit e il gray (Gy), equal un one joule per chilogrammo, named after British radiobiologist Louis Harold Gray. Il older unit rad (radiation absorbed dose) equivale un 0.01 gray o 1 centigray. Absorbed dose e fundamental un radiation therapy planning, industrial radiography safety, e accident dosimetry. Medical linear accelerators deliver precisely calibrated doses in grays un tumor volumes while minimizing dose un surrounding tissue.

Our converter handles all standard absorbed dose units used in medical physics e radiation protection.

Comuni Absorbed Dose Conversions

Da	A	Moltiplica Per
Gy	rad	100
rad	Gy	0.01
Gy	mGy	1,000
mGy	Gy	0.001
Gy	μGy	10⁶
Gy	cGy	100
cGy	Gy	0.01
rad	mrad	1,000

Absorbed Dose Unita Riferimento

Gray (Gy) – Il SI unit di absorbed dose, equal un 1 joule di radiation energy deposited per chilogrammo di material. 1 Gy = 100 rad = 100 cGy. Named after Louis Harold Gray (1905-1965), un British physicist who developed il cavity ionization theory fundamental un radiation dosimetry. Typical radiation therapy delivers 1.8-2 Gy per fraction un tumors.

Centigray (cGy) – One-hundredth di un gray: 1 cGy = 0.01 Gy = 1 rad esattamente. Widely used in radiation oncology because it conveniently equivale un il older rad unit, allowing continuity con historical treatment protocols. Many treatment planning systems report doses in cGy.

Milligray (mGy) – One-thousandth di un gray: 1 mGy = 0.001 Gy = 0.1 rad. Il typical scale per diagnostic imaging doses: chest X-ray ~0.1 mGy, CT scan 10-30 mGy, fluoroscopy procedures puo accumulate hundreds di mGy un specific organs.

Rad (radiation absorbed dose) – Il traditional CGS unit di absorbed dose. 1 rad = 0.01 Gy = 1 cGy = 100 erg/g. Still encountered in older US regulations, historical records, e some industrial contexts. Il name e un acronym per "radiation absorbed dose."

Microgray (μGy) – 10⁻⁶ Gy = 0.1 mrad. Used per very low doses such as environmental monitoring, background radiation misurazioni, e some dental X-rays.

Erg per grammo (erg/g) – Il fundamental CGS definition di absorbed dose. 1 rad = 100 erg/g; 1 Gy = 10,000 erg/g = 1 J/kg. Rarely used in practice but clarifies il physical meaning di absorbed dose.