Free ARRT Limited Scope Exam Flashcards

Verify the patient with two identifiers and match them to the order. Do not rely only on room number, location, or recognition.

PHI is individually identifiable health information in any form, including verbal, written, electronic, image, order, and documentation data.

Stop the exam, notify the appropriate provider or supervisor, and document according to policy. A valid order does not override the patient's right to refuse.

Informed consent means the patient has enough information to agree to or refuse care. The imaging operator must respect refusal and avoid coercion.

Battery is intentional touching without consent. Continuing to position or image a patient who has refused can create a legal risk.

It means an employer may be responsible for negligent actions performed by an employee within the scope of employment.

Use calm, clear, direct instructions with appropriate eye contact and respectful touch. Confirm understanding before exposure.

Standard precautions treat blood and body fluids as potentially infectious for every patient. They include hand hygiene, PPE when indicated, and safe handling of contaminated items.

Perform hand hygiene before and after patient contact, after removing gloves, after contact with bodily fluids, and after touching contaminated surfaces.

Medical asepsis uses clean technique to reduce microorganisms and prevent spread. It is different from sterile technique, which aims to keep an area free of microorganisms.

Prevent injury to the patient and staff. Lock equipment, use proper body mechanics, ask for help when needed, and protect tubes or lines.

Stay with the patient if safe, call for help, follow facility emergency procedures, and provide only care within your scope and training.

ALARA means keeping occupational radiation exposure as low as reasonably achievable. It is applied through time, distance, shielding, and careful technique.

Less time near a radiation source means less exposure. Keep fluoroscopy or exposure time as short as practical and avoid unnecessary repeat images.

Increasing distance from the source reduces exposure sharply. Step back when possible and use positioning aids instead of holding patients.

Shielding places protective material between radiation and sensitive tissue or personnel. It must not cover anatomy of interest or interfere with the exam.

Collimation restricts the x-ray beam to the anatomy of interest. It reduces patient dose and scatter and can improve image contrast.

Scatter radiation is deflected radiation produced when the beam interacts with tissue or objects. It lowers image contrast and is the main source of staff exposure.

A personnel dosimeter monitors occupational radiation exposure. It should be worn as directed by policy and never shared or intentionally exposed.

Radiation intensity decreases as distance from the source increases. Doubling distance greatly reduces exposure, which is why stepping back matters.

kVp controls beam energy and penetration. Higher kVp generally increases penetration and affects image contrast and patient dose.

mAs controls the quantity of x-ray photons. Increasing mAs increases receptor exposure and patient dose if other factors stay the same.

A meaningful increase in kVp can roughly double receptor exposure if mAs is unchanged. Technique changes should balance penetration, exposure, and dose.

Quantum noise appears when too few photons reach the image receptor. It often results from insufficient exposure for the selected exam.

Image contrast is the visible difference between adjacent densities. It is affected by subject contrast, beam energy, scatter, processing, and display settings.

Spatial resolution is the ability to show small structures clearly. Motion, focal spot size, receptor factors, and geometry can reduce it.

Magnification increases when the object is farther from the image receptor or the source-to-image distance is shorter. Keep anatomy close to the receptor when possible.

Motion blur comes from patient movement, equipment movement, or long exposure time. Clear breathing instructions and immobilization help prevent repeats.

A grid absorbs scatter before it reaches the receptor. It improves contrast but usually requires more exposure and careful alignment.

AEC terminates the exposure when enough radiation reaches the detector. Correct chamber selection and positioning are essential for accurate exposure.

The x-ray tube converts electrical energy into x-rays and heat. The filament produces electrons and the target produces x-rays when electrons strike it.

Filtration removes low-energy photons that would add patient dose without improving the image. It hardens the beam before it reaches the patient.

Beam restriction limits the size of the x-ray field. It reduces irradiated tissue, lowers scatter, and helps meet radiation protection expectations.

Exposure indicator gives feedback about receptor exposure in digital imaging. It helps identify underexposure or overexposure, but it does not replace image evaluation.

Check patient ID, anatomy included, marker placement, positioning, motion, exposure, contrast, collimation, and whether the image answers the order.

Side markers identify left or right anatomy and help prevent interpretation errors. They should be visible, correct, and not obscure anatomy.

Quality assurance is the overall program that keeps imaging equipment, procedures, and image quality reliable. It includes routine checks, documentation, and corrective action.

Quality control is the set of specific tests used to monitor equipment performance, such as checks of display, exposure, alignment, or protective equipment.

The central ray is the center of the x-ray beam. It must be directed to the correct anatomy and aligned with the receptor for the projection.

A projection describes the path of the x-ray beam through the body, such as AP, PA, lateral, or oblique.

A position describes how the patient is placed, such as upright, supine, prone, lateral, or oblique. It is not the same as beam direction.

Upright positioning helps show air-fluid levels, allows better lung expansion, and reduces heart magnification compared with many supine setups.

It should include the lung apices and costophrenic angles, show minimal rotation, and have adequate inspiration and exposure.

Include the anatomy of interest and adjacent joint when required, minimize motion, and position the part to show the requested projection clearly.

Including adjacent joints helps show alignment and related injury. Follow the order and facility protocol for the exact anatomy needed.

Oblique positioning separates overlapping anatomy and can show structures that are hidden on straight AP, PA, or lateral views.

Use careful positioning, avoid unsafe movement after trauma, and follow protocol to include required anatomy before accepting the image.

Align the midsagittal plane, reduce rotation, and center to the requested lumbar anatomy. Support may be needed for comfort and stability.

Precise head positioning and correct beam angle are critical because small rotations can obscure air-fluid levels or sinus anatomy.

Position the foot or ankle to show the ordered anatomy without rotation, include required joints, and use markers and shielding according to protocol.