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Biophysics & Medical Physics

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Biophysics & Medical Physics

Radiation Dosimetry

The subfield of medical physics quantifying and measuring ionizing radiation energy deposited in human tissues or phantom materials.

D = dĒ / dm (Absorbed Energy per Unit Mass) Gy (Gray = J/kg) Biophysics & Medical Physics

Radiobiology

The study of the biological mechanisms and health effects of ionizing radiation acting on living cells and biological tissues.

DNA Double-Strand Breaks (DSB) ~ 35–40 per Gy per Cell Gy (Dose Response Units) Biophysics & Medical Physics

Radiopharmaceuticals

Pharmaceutical compounds containing radioactive isotopes administered to patients for target-specific diagnostic imaging or therapy.

Targeted Radionuclide Compound: Radiotracer + Carrier Molecule MBq or mCi (Administered Activity) Biophysics & Medical Physics

Radiotherapy

The clinical treatment of malignant cancer tumors using precisely targeted ionizing radiation beams to induce double-strand DNA damage in…

Linear-Quadratic Cell Survival: S = exp(-α D - β D²) Gy (Gray = J/kg) Total Prescribed Dose Biophysics & Medical Physics

Relative Biological Effectiveness (RBE)

The ratio of absorbed dose of a reference 250 kVp X-ray beam to the absorbed dose of a test radiation type required to produce an identical…

RBE = D_reference (250 kVp X-rays) / D_test (for equal biological effect) Dimensionless Ratio