Radiology Questions

To introduce contrast medium for myelography, the subarachnoid space is punctured at which of the following sites?A. C6-7B. T10-11C. L1-2D. L3-4

Total filtration in an x-ray tube using 70 kVp or higher must be at least:1.5 mm Al 2.5 mm Al 2.5 mm Pb 3.0 mm Pb

Which of the following will result in an underexposed radiograph while using automatic exposure control (AEC)? A. Insufficient backup time setB. Having the upright Bucky selected while using the table BuckyC. Having a positive density setting instead of a normal density settingD. Small focal spot set

Which of the following statements concerning mobile (portable) radiography is/are true?1. The cord to the exposure switch must allow the radiographer to get at least 2 meters (6 feet) from the patient2. All operators of portable units should wear lead aprons3. The source-to-skin distance cannot be less than 12"A. 1 onlyB. 1 & 2 onlyC. 2 & 3 onlyD. 1, 2 & 3

The knee should be flexed approximately how much in the lateral projection:5 - 10 degrees 20-30 degrees 45-60 degrees 90 degrees

Which of the following anatomical areas should be covered with protective shielding when they are in or near a properly collimated beam?1. Breasts2. Bone marrow3. Reproductive organsA. 1 & 2 onlyB. 1 & 3 onlyC. 2 & 3 onlyD. 1, 2 & 3

The allowable radiation dosage that is assumed to result in an average nominal lifetime risk is known as what?A. Whole body doseB. Equivalent dose limitsC. Genetically significant doseD. Maximum permissible dose

A lead apron is designed to protect the radiographer from scatter radiation. A protective apron must have a lead equivalency of at least:A. .25 mm.B. .50 mm.C. 1.0 mm.D. 2.0 mm.

Which of the following image receptors will require the least radiation exposure to the patient?A. 200 speed film-screenB. 400 speed film-screenC. Computed radiographyD. Direct digital radiography

Grids used for computed radiography (CR) must have a grid frequency higher than:A. 50 lines per inchB. 100 lines per inchC. 150 lines per inchD. 200 lines per inch

Which of the following are used in diagnostic x-ray tube anodes:1 tungsten2 lead3 rheniumA.1 & 2 B. 1 & 3 C. 2 & 3 D. 1, 2 & 3

What is it called when a primary photon changes direction but NOT energy? A. Coherent (classical) scatterB. Modified scatteringC. Compton effectD. Photoelectric absorption

Which of the following should be used to detect quantum noise in a digital image?1. Evaluate exposure indicator numbers2. Use the window level and window width features3. Magnify the digital imageA. 1 onlyB. 1 & 2 onlyC. 1 & 3 onlyD. 1, 2 & 3

Which of the following accurately names the body cavities?A. Cranial, thoracic, abdominalB. Mediastinum, renal, pelvisC. Thoracic, abdominal, pelvicD. Ventricle, fossa, sulci

Which vertebral body is at the level of the sternal angle:A. T1-T2 B. C6-C7 C. T4-T5 D. T10-T11

If a patient's I.V. site becomes puffy and swollen, what should the radiographer do?A. Pull the needle out and restart the I.V.B. Check with the head nurseC. Clamp off the I.V.D. Do nothing

Which of the following oxygen delivery systems would indicate the patient needs a high rate of oxygen supply?A. Nasal cannulaB. Oxygen maskC. Nonrebreathing maskD. Nasal catheter

How long can the latent image remain "stored" in the phosphor layer of a photostimulable phosphor plate?A. 1 hourB. 6 hoursC. 12 hoursD. 24 hours

While positioning a patient for a PA chest he tells you he has had his left lung removed. Which photocell(s) would you activate on the AEC?A. Both outside cellsB. The center cellC. The right cellD. The right and center cell

With CR, what percentage of the electrons that are originally released in the imaging plate are trapped to form the latent image?A. 10%B. 25%C. 50%D. 90%