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Medical physics flashcards
86 cards drawn from the 11 lessons of medical physics: 24 definitions, 47 recall prompts, 4 off-sheet equations and 11 spot-the-error cards. Grade yourself and the deck reschedules each card at staged intervals, from the next day out to three weeks.
Year 13 · Medical physics lessons · all 851 cards
Every card in this unit
Click any card to try it in the player above; the card itself links the lesson that teaches it.
- Acoustic impedanceDefine
- State what determines the fraction of a pulse reflected at a boundaryRecall
- Coupling gelDefine
- State how to find the depth of a boundary from a pulse-echo timeRecall
- Piezoelectric effectDefine
- State the unit of acoustic impedanceRecall
- Explain the frequency trade-off in ultrasoundRecall
- State the attenuation law for ultrasound in tissueRecall
- Explain why the Doppler shift from flowing blood is doubledRecall
- State what the angle θ is measured between in Doppler ultrasoundRecall
- State the two limits on the detail a pulse-echo scan can resolveRecall
- Depth of a boundary from its echo timeEquation
- Ultrasound imagingSpot the error
- Coherent bundleDefine
- Relaxation timeDefine
- State the chain of events in an MR scanRecall
- Explain why an MR scan delivers no radiation doseRecall
- MR scanning and the endoscopeSpot the error
- Attenuation coefficientDefine
- Explain the X-ray contrast of boneRecall
- State the maximum X-ray photon energyRecall
- Explain the different effects of tube voltage and tube currentRecall
- Half-value thicknessDefine
- Explain pair production as an attenuation mechanismRecall
- Maximum photon energy from the tube voltageEquation
- The physics of diagnostic X-raysSpot the error
- Intensifying screenDefine
- Explain the cost of using an intensifying screenRecall
- State what a CT scanner does that a plain X-ray cannotRecall
- State why a CT beam is narrow and collimatedRecall
- X-ray detectors and CT scanningSpot the error
- TracerDefine
- State what radionuclide imaging showsRecall
- Coincidence detectionDefine
- State what a coincidence pair locatesRecall
- State the energy of each PET annihilation photonRecall
- Explain why annihilation photons leave back to backRecall
- State the half-life of technetium-99mRecall
- State how to find the effective half-life of a tracerRecall
- State what PET scanning is used to diagnoseRecall
- Explain why a PET scanner is combined with a CT scannerRecall
- Radionuclide imaging and the gamma cameraSpot the error
- PET scanning and radiotherapySpot the error
- AccommodationDefine
- Near pointDefine
- Far pointDefine
- State the nature of the image on the retinaRecall
- MyopiaDefine
- HypermetropiaDefine
- AstigmatismDefine
- State the three parts of a prescription for astigmatismRecall
- State the power of the lens that corrects myopiaRecall
- Explain why cones resolve finer detail than rodsRecall
- State the wavelength the eye is most sensitive to in bright lightRecall
- FoveaDefine
- The eye as an optical systemSpot the error
- Defects of vision and their correctionSpot the error
- IntensityDefine
- Threshold of hearingDefine
- Intensity levelDefine
- Explain why sound is measured on a logarithmic scaleRecall
- State the change in intensity level when the intensity is multiplied by tenRecall
- Equal loudness curveDefine
- Explain how an equal loudness curve is producedRecall
- State where the ear is most sensitiveRecall
- State what the dBA scale is forRecall
- Explain how the middle ear raises the pressureRecall
- State why the middle ear must raise the pressureRecall
- Explain what noise damage or age does to the equal loudness curvesRecall
- The ear and the transmission of soundSpot the error
- Intensity of a wave from its power and areaEquation
- Relative intensity level of two soundsEquation
- Intensity, loudness and the decibel scaleSpot the error
- Resting potentialDefine
- Action potentialDefine
- DepolarisationDefine
- Explain where the p.d. an ECG measures comes fromRecall
- State the three requirements of an ECG amplifierRecall
- State why conducting gel is used under an ECG electrodeRecall
- State what the P wave representsRecall
- State what the QRS complex representsRecall
- State what the T wave representsRecall
- Explain why the QRS complex is the largest deflectionRecall
- Explain why the T wave is broader and lower than the QRS complexRecall
- State how a heart rate is read from an ECG traceRecall
- Biological measurementSpot the error
The lessons these cards come from
- Ultrasound imaging
- MR scanning and the endoscope
- The physics of diagnostic X-rays
- X-ray detectors and CT scanning
- Radionuclide imaging and the gamma camera
- PET scanning and radiotherapy
- The eye as an optical system
- Defects of vision and their correction
- The ear and the transmission of sound
- Intensity, loudness and the decibel scale
- Biological measurement
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