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RTBC QUESTIONS WITH APPROVED
ANSWERS
The formation of urine begins in the: Glomerulus In which quadrant of the abdomen is the vermiform appendix? Right lower quadrant What is used to change the grayscale values in the recorded image to a new range of values in order to improve the displayed image? Look-up table What is the primary absorber of xray photons during fluoroscopic procedures? Patient What structure is located at the level of the interspace between t4-t5? Sternal angle Who is required to wear a personnel dosimeter? Anyone who may be exposed to an annual occupational dose of 5msv The distance from the center of one pixel to the center of the adjacent pixel is called what? Pitch What condition would be an indication for retrograde uretherography? Urethral obstruction Dynamic range Range of exposures that can be captured by a detector What projection would best demonstrate the cuboid bone? Medial oblique foot The purpose of adding phases and rectifiers in the xray circuit is to: Maintain high voltage What exposure technique system uses the rule to double of halve milliampere seconds for every 5cm of subject thickness? Fixed kvp system
What valve in the heart separates the right atrium What is the area of the anode called that is struck by the electrons released from the focusing cup? Actual focal spot When using fluoroscopy, what is directly proportional to the exposure delivered to the patient? Ma The gray-scale of a digital image is affected by the: Bit depth The distance from the center of one pixel to the center of the adjacent pixel is called: Pitch Exposure latitude is defined as the: Range of exposures that produces quality images at an appropriate patient dose Effective focal spot The area of the focal spot that is projected out of the tube toward the object being imaged What type of personnel dosimeter uses aluminum oxide as the absorbing material? Osl What type of personnel dosimeter uses lithium fluoride? Tld Where is the technique chart of anatomically programmed technique systems stored? In the microprocessor of the control unit What pathologic condition would more readily be seen when using the valsalva maneuver? Esophageal varices Which radiation measurement is most helpful when comparing biologic damage from different radiation types? Equivalent dose Medical tort Intentional or negligent/unintentional damages to a person
Patient dose will be increased Ncrp requires that leakage radiation from the fluoroscopic tube must be below: 1 mgy/hr at 1 meter from the tube What is released during a photoelectric interaction as the electrons cascade to fill the void left by the ejected inner shell electron? Characteristic x-ray photon Current federal standards limit entrance exposure rates of general-purpose intensified fluoroscopic units to a maximum of: 100 mgy per minute What results in the production of characteristic x-ray photons in an x-ray tube? Released binding energy Radiation safety standards require that collimators be accurate within what percentage of the sid? 2% On the average patient, the esophagus ends at what vertebral level? T What is true about grids used in fluoroscopy Grid ratios used in fluoroscopy are generally lower than common radiographic grids What type of joint is a costovertebral joint? Synovial gliding What position should a patient be in to place the right kidney parallel to the ir? 30 degree lpo During compton interactions, the incident x-ray photon interacts with what portion of an atom? Outer-shell electron What duct joins the common bile duct as it enters the small bowel? Pancreatic duct A patient has pain in the left anterior part of the chest, what position would demonstrate this area best? Rao The most anterior portion of the sacrum is the: Sacral promontory Another term that can be used for tissue reactions to radiation is:
Non-stochastic effect What portion of the x-ray circuit must use ac in order to function correctly? Transformers What type of joint is the sc joint? Synovial gliding What radiation quantity units are supplied for fluoroscopic procedures? Air kerma As the quality of the beam increases, attenuation will: Decrease The anatomic opening created by the vertebral arch, in which the spinal cord is found is known as the: Vertebral foramen What must be worn when entering the room of a patient in droplet isolation? A mask To evaluate the luminance response of a digital display monitor, one would need to utilize a: Photometer Compared to other cells in the body, the relative radiosensitivity of blood cells is: High Which of the following operations results in edge enhancement? High-pass filtering What is required for an infection to survive and be transmitted? A pathogen, a favorable environment for microorganism growth, and exogenous or endogenous transmission A patient has the right to review his or her medical records and access information to ensure everything is correct and complete under the document created by which hospital affiliation? American hospital association (aha) During which stage of development do children generally begin to initiate contact with people other than their parents? Preschool age How many shades of gray can be produced by an 8-bit digital radiography system?
What is the most common cause of esophageal varices? Portal hypertension Normal bun range 6 - 20 mg/dl When the radiation dose if high, the oer for xrays is: 3 When performing a double contrast barium study of the colon, what is the recommended product density? 75 - 95% weight/volume Rescaling Used to process digital image data and display it as if it was exposed using proper technical factors, even when that is not the case What position are the cuboid articulations. Sinus tarsi, and tuberosity of the fifth metatarsal best demonstrated? Ap oblique foot with medial rotation In the lateral position, how far posterior is the sacrum in relation to the asis in the sthenic patient? 3.5 inches A technologist guilty of assault could face which of the following penalties? Payment of monetary damages What would provide fluoroscopic imaging personnel with the best radiation protection opportunity? Controlling the fluoroscopic system remotely On a properly positioned pa axial projection of the skull (caldwell method) the central ray exits at the level of: Nasion Stress images of the ankle be ordered to evaluate what pathologic condition? Inversion/eversion injury Changes to the ma or exposure time are known to affect what aspect of the xray beam? Intensity Si unit for exposure Coulombs per kilogram (c/kg) Which radiation quantity units are supplied for fluoroscopic procedures?
Air kerma The measurement of the rate at which electrons flow is known as: Amperage The ncrp requires that leakage radiation from the fluoroscopic tube must be below: 1 mgy/hr at 1 meter from the tube If the primary beam area is doubled by opening the collimator, patient dose and exposure to the operator will: Increase by a factor of 2 Which duct joins the common bile duct as it enters the small bowel? Pancreatic duct The dorsum sellae is projected within the foramen magnum in which projection of the skull? Ap axial skull (towne) The carpal canal is a passageway at the anterior wrist that is found between which bones? Hamate and trapezium Cataractogenesis does not occur at low levels of radiation exposure, it is best expressed by what dose-response relationship? Nonthreshold The blood count is depressed after a whole-body dose equivalent of at least how many msv? 0.25 msv Radiation doses up to ____ are considered relatively low risk to the embryo and fetus. 0.20 msv The best way to keep the radiation dose to the patient low is? Avoid repeat exposures Ct accounts for approximately what percent dose to the population (ncrp report #160)? 24% Exposure times longer than ____ minutes can lead to skin effects 30
Assult Neglect or omission of reasonable care is known as: Unintentional misconduct What type of infection transmission is defined as being spread primarily on contaminated items, food, or water? Common vehicle transmission
