Podcast
Questions and Answers
For what all purposes is diathermy primarily used?
For what all purposes is diathermy primarily used?
What surgical functions are performed by the diathermy machine?
What surgical functions are performed by the diathermy machine?
Which of the following is not a typical application of diathermy?
Which of the following is not a typical application of diathermy?
What is the primary benefit of using diathermy in surgical procedures?
What is the primary benefit of using diathermy in surgical procedures?
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What type of energy does diathermy primarily utilize?
What type of energy does diathermy primarily utilize?
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Which technique is particularly associated with diathermy?
Which technique is particularly associated with diathermy?
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Which of the following conditions might diathermy be used for therapeutically?
Which of the following conditions might diathermy be used for therapeutically?
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In what way does diathermy affect the temperature of tissues?
In what way does diathermy affect the temperature of tissues?
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Which of these statements about diathermy is false?
Which of these statements about diathermy is false?
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What is a common risk associated with diathermy use?
What is a common risk associated with diathermy use?
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What is the major technical challenge in cardiac CT?
What is the major technical challenge in cardiac CT?
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What leads are considered inferior leads in EKG?
What leads are considered inferior leads in EKG?
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Which factor is the major determinant of temporal resolution in CT?
Which factor is the major determinant of temporal resolution in CT?
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What does one small square on an EKG represent in terms of time?
What does one small square on an EKG represent in terms of time?
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What is the goal of automated exposure compensation in CT?
What is the goal of automated exposure compensation in CT?
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What lead placement corresponds to V4?
What lead placement corresponds to V4?
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What view of the heart does leads V5-V6 provide?
What view of the heart does leads V5-V6 provide?
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What characteristic of kV changes in CT is advantageous for tissue contrast?
What characteristic of kV changes in CT is advantageous for tissue contrast?
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In which lead would you see a biphasic P wave?
In which lead would you see a biphasic P wave?
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In which lead(s) would you observe a deep S wave?
In which lead(s) would you observe a deep S wave?
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Which lead(s) show a tall R wave?
Which lead(s) show a tall R wave?
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In which lead(s) would you see a biphasic complex indicating a transition zone?
In which lead(s) would you see a biphasic complex indicating a transition zone?
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What represents the normal height of the T wave?
What represents the normal height of the T wave?
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In induction field diathermy, what is the primary means of achieving heating effects?
In induction field diathermy, what is the primary means of achieving heating effects?
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What part of the EKG is known as the plateau phase, representing the initial part of ventricular repolarization?
What part of the EKG is known as the plateau phase, representing the initial part of ventricular repolarization?
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What segment's elevation or depression indicates serious pathology?
What segment's elevation or depression indicates serious pathology?
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What attributes are associated with a low dielectric constant and conductivity?
What attributes are associated with a low dielectric constant and conductivity?
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What does the parasympathetic system do to the heart and what receptors are associated with it?
What does the parasympathetic system do to the heart and what receptors are associated with it?
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Which of the following describes a high dielectric constant and conductivity?
Which of the following describes a high dielectric constant and conductivity?
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The electric field is expected to converge onto which type of substance?
The electric field is expected to converge onto which type of substance?
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What term defines the process of using radiation to destroy cancer cells?
What term defines the process of using radiation to destroy cancer cells?
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Which pair of scattering types is critical for diagnostic imaging?
Which pair of scattering types is critical for diagnostic imaging?
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Electrophoresis is a technique primarily used for what purpose?
Electrophoresis is a technique primarily used for what purpose?
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The speed of ion migration in an electric field is influenced by which of the following factors?
The speed of ion migration in an electric field is influenced by which of the following factors?
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What type of input impedance is ideal for an operational amplifier?
What type of input impedance is ideal for an operational amplifier?
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What is the typical gain range for wide band amplifiers?
What is the typical gain range for wide band amplifiers?
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Which configuration is not possible for operational amplifiers?
Which configuration is not possible for operational amplifiers?
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What type of therapy is based on the use of radio waves?
What type of therapy is based on the use of radio waves?
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What is the penetration depth of millimetric wave therapy?
What is the penetration depth of millimetric wave therapy?
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Which component helps in generating X-rays?
Which component helps in generating X-rays?
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Which metal is NOT typically used as a target in the Coolidge tube?
Which metal is NOT typically used as a target in the Coolidge tube?
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What effect occurs when X-rays emitted from molybdenum pass through a zirconium filter?
What effect occurs when X-rays emitted from molybdenum pass through a zirconium filter?
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Which statement correctly describes a single transverse slice in helical CT?
Which statement correctly describes a single transverse slice in helical CT?
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How is pitch defined in helical CT?
How is pitch defined in helical CT?
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What is a primary benefit of high-pitch techniques in helical CT?
What is a primary benefit of high-pitch techniques in helical CT?
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Which term best reflects the total amount of radiation delivered to the patient during a CT scan?
Which term best reflects the total amount of radiation delivered to the patient during a CT scan?
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What is a measure designed to reflect stochastic (cancer) risk from radiation in CT?
What is a measure designed to reflect stochastic (cancer) risk from radiation in CT?
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Which effect in CT can be measured by CT Dose Index (CTDI)?
Which effect in CT can be measured by CT Dose Index (CTDI)?
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What happens to radiation dose as patient size increases with the same CTDI?
What happens to radiation dose as patient size increases with the same CTDI?
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Which parameter is used to correct CTDI for patient size?
Which parameter is used to correct CTDI for patient size?
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Study Notes
Important Medical Imaging Concepts
- Diathermy: Used for surgical and therapeutic purposes, including cutting, coagulation, and fulguration.
- Diathermy Types: Short wave, microwave, ultrasound, and electrical impulses. Microwave diathermy is good for deep tissue healing.
- Ultrasound Diathermy Frequency: The frequency range is 0.7-3.3 MHz.
- Diathermy Precautions: Use pads for grounding and completing circuit. Patients should lie on soft pillows.
- Diathermy Power: Diathermy machines can operate with maximum voltages and power outputs; the highest resistance they can handle is dependent on these maximums.
- Biological Damage Measurement: Units for measuring biological damage from radiation include Curie, Rem, Rad, and Roentgen.
- Radiation Failure: The cerebral system can begin to show signs of failure above 200-600 rad of radiation.
- Radioactive Material: A hypothetical radioactive material with 20000 active photons and a certain decay constant will have a specific remaining amount after a certain number of years.
Medical Imaging Techniques and Applications
- Radiotherapy: A method of destroying cancer cells using radiation.
- Electrophoresis: A technique that separates charged particles using an electric field. Used to separate proteins according to their electrophoretic mobility. Factors that influence mobility include molecular weight, shape, charge, and the size of the molecule.
- Electrophoresis Methods: SDS PAGE (Sodium Dodecyl Sulfate Polyacrylamide Gel Electrophoresis) is used to separate proteins according to their electrophoretic mobility.
- Sonar: A method that uses sound waves to detect and locate objects underwater (sound navigation and ranging).
- Ultrasound: Uses sound waves to produce images; important in medical imaging for different areas of the body. The speed of ultrasound in seawater impacts how far ultrasound can travel before returning to the ship.
- Frequency Range: Ultrasonic frequencies are those above 20,000 Hz
- Ultrasound Production: Piezoelectric crystals are used to produce ultrasound waves.
- Ultrasound in Medical Imaging: The information provided about the speed of ultrasound in the medium and the time it takes for the signal to return from the object, allows calculations of the distance from the sender to the object.
- Medical Imaging Modalities: Different medical imaging methods for different purposes include PET, SPECT, CT, MRI and Ultrasound.
Medical Imaging Principles, Techniques, and Equipment
- Electrophoresis Techniques: Electrophoresis apparatus consists of an electrode, running buffer and gel.
- X-ray Equipment: Equipment includes an X-ray tube, a high voltage generator for powering the X-ray tube, a detector, and a collimator for directing and focusing the x-ray beam.
- X-ray Exposure: Various parts of the body may require different amounts of exposure times.
- X-ray Precautions: Distance from the x-ray source is critical.
- X-ray shielding: Lead or similar material is important to minimize exposure of the radiation source to equipment and personnel.
- X-ray Types and applications: X-ray machines are used in a variety of ways.
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Description
This quiz covers essential concepts in medical imaging, focusing on diathermy types, frequencies, precautions, and the measurement of biological damage from radiation. Explore the various applications of diathermy in therapeutic settings, as well as the implications of radiation exposure. Test your knowledge on these crucial medical imaging topics.
