O que's o difference entre absorbed dose e equivalent dose?

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

Por que é radiation therapy given in fractions?

Fractionation (e.g., 2 Gy/day for 30 days) allows healthy tissue to repair entre doses while tumor tissue, com poorer repair mechanisms, accumulates damage. Total dose of 60 Gy would be lethal if given at once, but fractionated delivery é tolerable e effective.

Como much radiation causes acute sickness?

Acute radiation syndrome begins around 0.5-1 Gy whole-body dose. Nausea starts at 1 Gy. Sem treatment, 50% mortality occurs at 3-4 Gy (LD50/30). Above 6 Gy, survival sem heroic intervention é unlikely. Local doses (like in therapy) são diferente from whole-body.

Dose de Radiação Absorvida Converter

Sobre Radiação Absorvida Dose Conversão

Absorvida dose measures o energy deposited by ionizing radiation per unidade mass of material. Unlike exposure (qual measures ionization in air), absorbed dose applies to qualquer material—tissue, bone, metal, ou plastic—e directly relates to potential biological damage. O mesmo absorbed dose can têm diferente effects depending on radiation type, qual é por que equivalent dose (sieverts) foi developed for biological risk assessment. Absorvida dose tells you o pure física: como much energy foi deposited.

O SI unidade é o gray (Gy), igual to one joule per kilogram, named after British radiobiologist Louis Harold Gray. O older unidade rad (radiation absorbed dose) é igual a 0.01 gray ou 1 centigray. Absorvida dose é fundamental to radiation therapy planning, industrial radiography safety, e accident dosimetry. Medical linear accelerators deliver precisamente calibrated doses in grays to tumor volumes while minimizing dose to surrounding tissue.

Our converter handles todos padrão absorbed dose unidades usado in medical física e radiation protection.

Comuns Absorvida Dose Conversions

De	Para	Multiplicar Por
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

Absorvida Dose Referência de Unidades

Gray (Gy) – O SI unidade of absorbed dose, igual to 1 joule of radiation energy deposited per kilogram of material. 1 Gy = 100 rad = 100 cGy. Named after Louis Harold Gray (1905-1965), a British physicist who developed o cavity ionization theory fundamental to radiation dosimetry. Typical radiation therapy delivers 1.8-2 Gy per fraction to tumors.

Centigray (cGy) – One-hundredth of a gray: 1 cGy = 0.01 Gy = 1 rad exatamente. Widely usado in radiation oncology because it conveniently é igual a o older rad unidade, allowing continuity com historical treatment protocols. Muitos treatment planning systems report doses in cGy.

Milligray (mGy) – One-thousandth of a gray: 1 mGy = 0.001 Gy = 0.1 rad. O typical scale for diagnostic imaging doses: chest X-ray ~0.1 mGy, CT scan 10-30 mGy, fluoroscopy procedures may accumulate hundreds of mGy to specific organs.

Rad (radiation absorbed dose) – O traditional CGS unidade of absorbed dose. 1 rad = 0.01 Gy = 1 cGy = 100 erg/g. Ainda encountered in older US regulations, historical records, e alguns industrial contexts. O name é an acronym for "radiation absorbed dose."

Microgray (μGy) – 10⁻⁶ Gy = 0.1 mrad. Usado for muito low doses tal as environmental monitoring, background radiation medições, e alguns dental X-rays.

Erg per gram (erg/g) – O fundamental CGS definition of absorbed dose. 1 rad = 100 erg/g; 1 Gy = 10,000 erg/g = 1 J/kg. Rarely usado in practice but clarifies o physical meaning of absorbed dose.