Biophysics & Medical Physics

The physical quantity measuring the amount of energy deposited by ionizing radiation per unit mass of matter.

D = dE / dm, 1 Gy = 1 J / kg = 100 rad Gy (Gray = J/kg)

A rapid, self-propagating electrical voltage impulse along the membrane of excitable cells (neurons and muscle cells).

v_conduction ∝ √(d) (Unmyelinated), v_conduction ∝ d (Saltatory Myelinated) mV (Amplitude ~100 mV) & m/s (Conduction Speed)

Biophysics & Medical Physics

The energy-requiring transport of ions or molecules across a biological cell membrane against their concentration gradient.

3 Na⁺_out + 2 K⁺_in per ATP Hydrolyzed (Sodium-Potassium Pump) Ions/sec or μmol/min

Biophysics & Medical Physics

A fundamental radiation protection safety principle stating that all radiation exposures must be kept 'As Low As Reasonably Achievable'…

Dose Optimization: Minimize Time, Maximize Distance, Optimize Shielding Radiation Safety Protocol

Biophysics & Medical Physics

The clinical evaluation and quantitative measurement of human hearing sensitivity across pure tone sound frequencies.

Hearing Level dB HL = 20 log₁₀(P_measured / P_reference) dB HL (Decibels Hearing Level) & Hz