Radiology Questions
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Pixel size and spacing determine the spatial resolution of the digital image. This is known as:A. Pixel pitchB. Focal resolutionC. Nyquist resolutionD. Frequency modulation
Which of the following is an acceptable approximate entrance skin exposure (ESE) for a PA chest radiograph?6mR20mR38mR0.6R
Which of the following chemicals is used in the production of radiographic film emulsion?A. Sodium sulfiteB. Potassium bromideC. Silver halideD. Chrome alum
Abnormal accumulation of air in pulmonary tissues, resulting in overdistention of the alveolar spaces, isA. emphysema.B. empyema.C. pneumothorax.D. pneumoconiosis.
Drugs that may be used to prolong blood clotting time include1.heparin2. diphenhydramine (Benadryl)3. lidocaine
Which of the following is (are) valid criteria for a lateral projection of the forearm? 1. The radius and ulna should be superimposed proximally and distally. 2. The coronoid process and radial head should be superimposed. 3. The radial tuberosity should face anteriorly.
A positive contrast agent1 .absorbs x-ray photons2.results in a dark area on the radiograph3. is composed of elements having low atomic number
Which of the following types of adult tissue is (are) comparativerly insensitive to effects of ionizing radiation?1. Epithelial tissue2. Nerve tissue3. Muscle tissue
Which of the following will improve the spatial resolution of image-intensified images?1.A very thin coating of cesium iodide on the input phosphor2.A smaller-diameter input screen3.Increased total brightness gain
The carpal scaphoid can be demonstrated in which of the following projection(s) of the wrist?1. PA oblique2.PA with radial flexion3. PA with elbow elevated 20 degrees
The normal average rate of respiration for a healthy adult patient isA. 5 to 7 breaths/min.B. 8 to 12 breaths/min.C. 12 to 20 breaths/min.D. 20 to 30 breaths/min.
A backup timer for the AEC serves to1.protect the patient from overexposure2.protect the x-ray tube from excessive heat3.increase or decrease master density
Which of the following positions would best demonstrate the proximal tibiofibular articulation?A. APB. 90 degrees mediolateralC. 45-degree internal rotationD. 45-degree external rotation
All the following statements regarding three-phase current are true exceptA. three-phase current is constant-potential direct current.B. three-phase equipment produces more x-rays per milliampere-second.C. three-phase equipment produces higher-average-energy x-rays than single-phase equipment.D. the three-phase waveform has less ripple than the single-phase waveform.
Which of the following is a type of television camera tube that converts a visible image on the output phosphor of the image intensifier into an electronic signal?A. Ionization chamberB. VidiconC. Charge-coupled deviceD. Cathode ray tube
Which of the following is (are) associated with a Colles' fracture?1.Transverse fracture of the radial head2.Chip fracture of the ulnar styloid3.Posterior or backward displacement
Which of the following is (are) methods used for x-ray film silver reclamation?1.Photoelectric method2.Metallic replacement method3.Electrolytic method
Radiation dose to personnel is reduced by which of the following exposure control cord guidelines?1.Exposure cords on fixed equipment must be very short.2.Exposure cords on mobile equipment should be fairly long.3.Exposure cords on fixed and mobile equipment should be of the coiled, expandable type.
What structure can be located midway between the anterosuperior iliac spine (ASIS) and pubic symphysis?A. Dome of the acetabulumB. Femoral neckC. Greater trochanterD. Iliac crest
The type of shock often associated with pulmonary embolism or myocardial infarction is classified asA. neurogenic.B. cardiogenicC. hypovolemic.D. septic