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Biophysics & Medical Physics

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Biophysics & Medical Physics

Patch Clamp Technique

An electrophysiological laboratory technique used to record ion currents flowing through single individual ion channel proteins in cell…

I_single_channel ~ 1–10 pA (Gigaohm Seal Measurement) pA (Picoamperes) & GΩ (Gigaohm Resistance)
Biophysics & Medical Physics

Poiseuille's Law of Blood Flow

A fluid dynamics equation governing laminar viscous fluid flow through a cylindrical vascular pipe.

Q = (π r⁴ ΔP) / (8 η L) m³/s or L/min (Volumetric Flow Rate)
Biophysics & Medical Physics

Positron Emission Tomography (PET Scan)

A 3D nuclear medicine imaging technique detecting pairs of 511 keV gamma photons emitted during positron annihilation to map metabolic…

Coincidence Detection of 180° Back-to-Back 511 keV Gamma Photons MBq (Activity) & Standardized Uptake Value (SUV)
Biophysics & Medical Physics

Protein Folding

The physical process by which a polypeptide chain folds spontaneously into a characteristic 3D functional native structure.

Energy Funnel Concept: Minimizing Native State Free Energy G kJ/mol (Conformational Stability)
Biophysics & Medical Physics

Proton Therapy

An advanced form of external beam radiation therapy utilizing accelerated proton beams to destroy cancerous tumors.

Bragg Peak Energy Deposition Curve: (-dE/dx) ∝ 1 / v² MeV (Proton Beam Energy ~70–250 MeV)
Biophysics & Medical Physics

Pulse Oximetry

A non-invasive medical monitoring method measuring arterial blood oxygen saturation (SpO₂) using differential optical absorption of red and…

Ratio R = (AC₆₆₀/DC₆₆₀) / (AC₉₄₀/DC₉₄₀) ⇒ % SpO₂ Percentage (% SpO₂)