Non-ionising Imaging (AQA A-Level Physics): Flashcards

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Ultrasound imaging
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Ultrasound wave type

Longitudinal

Ultrasound frequency threshold

Above 2020 kHz

Medical ultrasound freq. range

11 MHz to 2020 MHz

Piezoelectric effect

PD applied causes deformation, generates ultrasound

Acoustic impedance formula

Z=ρcZ = \rho c (ρ\rho = density, cc = speed of sound)

Damping purpose

Produces short pulses, enhances resolution

Coupling medium purpose

Removes air for efficient transmission

Attenuation causes

Scattering and absorption

A-Scan typical application

Ophthalmology (e.g., eye length measurement)

B-Scan image determination

Amplitude of reflected signal → brightness

Explore AQA A-Level Physics Revision Notes by Topics

Medical Physics

Physics of the Eye

Physics of the Ear

Biological Measurement

Non-ionising Imaging

X-ray Imaging

Radionuclide Imaging and Therapy

Explore AQA A-Level Physics Model Answers by Topics

Medical Physics

Physics of the Eye

Physics of the Ear

Biological Measurement

Non-ionising Imaging

X-ray Imaging

Radionuclide Imaging and Therapy

Explore AQA A-Level Physics Quizzes by Topics

Medical Physics

Physics of the Eye

Physics of the Ear

Biological Measurement

Non-ionising Imaging

X-ray Imaging

Radionuclide Imaging and Therapy

Explore AQA A-Level Physics Exam Questions by Topics

Medical Physics

Physics of the Eye

Physics of the Ear

Biological Measurement

Non-ionising Imaging

X-ray Imaging

Radionuclide Imaging and Therapy

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