Mixed Deck — All CAMRT Topics Flashcards

A patient with a pacemaker presents for an MRI examination. What is the most appropriate action?

Answer: Consult the ordering physician and check if the pacemaker is MR-conditional before proceeding

MR technologists must verify the pacemaker model, determine if it is MR-conditional, and consult the ordering physician and MRI physicist before proceeding.

What is the function of the 'last image hold' (LIH) feature in fluoroscopic equipment?

Answer: It displays the most recently acquired fluoroscopic frame as a static image without ongoing radiation

LIH captures and displays the last acquired fluoroscopic frame as a static image, allowing the operator to review the image without continuing to expose the patient to radiation.

A digital radiograph of a knee appears excessively noisy and grainy. The exposure indicator (EI) is significantly below the target range. Which of the following is the most likely cause for this appearance?

Answer: Insufficient mAs

A grainy or noisy appearance, known as quantum mottle, is caused by an insufficient number of x-ray photons reaching the detector. The mAs setting directly controls the quantity of photons produced. A low exposure indicator value confirms that the detector received inadequate exposure, which is most commonly due to insufficient mAs.

A 16-year-old patient arrives for a chest X-ray to rule out pneumonia. They are legally considered a minor. According to Canadian healthcare consent principles, who should provide consent for the procedure?

Answer: The patient can provide consent if they are deemed to have the capacity to understand the nature and consequences of the procedure.

In Canada, the principle of a 'mature minor' applies. There is no specific age of consent for medical treatment. A minor who has the capacity to understand the relevant information (nature of the treatment, risks, benefits, alternatives) and appreciate the reasonably foreseeable consequences of a decision can give valid consent.

An elderly patient scheduled for a CT scan of the abdomen expresses significant anxiety about the procedure, stating, "I'm worried about the radiation and what you might find." What is the MOST appropriate initial response for a Medical Radiation Technologist (MRT)?

Answer: "I can see you're concerned. Let's talk about the procedure. What specific questions do you have about the radiation or the process?"

The correct response uses therapeutic communication techniques by acknowledging the patient's feelings (empathy), opening a dialogue, and inviting the patient to voice specific concerns. This approach respects patient autonomy and helps in providing clear, factual information to alleviate fears, as supported by the CAMRT's emphasis on patient-centered care and informed decision-making.

A trauma patient is brought in on a backboard following a high-speed motor vehicle collision. The initial request is for a portable pelvis radiograph to rule out a fracture. Which of the following projections is performed first and requires no manipulation of the patient's lower limbs?

Answer: AP Pelvis

In a trauma setting, the AP pelvis projection is the primary initial view. It is performed without any patient manipulation, such as rotating the limbs, to prevent the displacement of potentially unstable fractures. This single projection provides a crucial overview of the entire pelvic girdle and is a standard part of the initial trauma survey.

Which of the following is a key component of obtaining valid informed consent before performing a medical imaging procedure?

Answer: Confirming the patient understands the benefits, material risks, and alternatives to the proposed procedure.

Valid informed consent requires that the patient receives a clear explanation of the procedure, its expected benefits, any significant risks, and available alternatives, allowing them to make an informed decision. A generic admission form is insufficient for specific procedures, and information must be provided in an understandable manner.

How do PA and oblique projections of the hand differ?

Answer: PA is flat on detector; oblique at 45-degree rotation separating the metacarpals

The 45-degree oblique separates overlapping metacarpals.

What is the standard imaging protocol for suspected pneumothorax?

Answer: Erect PA chest on full expiration to increase contrast between collapsed lung and pleural air

Erect PA on expiration makes the pneumothorax proportionally more visible.

What ethical considerations apply when participating in research imaging?

Answer: Ethics board approval, informed consent for research, protocol adherence, and dose justification

Research imaging requires additional ethical safeguards including REB approval and specific consent.

How can an MRT contribute to the profession knowledge base through research?

Answer: Through clinical research, QI studies, case reports, and publishing findings

MRTs contribute through clinical studies, QI projects, case reports, and publication.

Which membership categories are available to non-certified individuals?

Answer: Student and associate membership

Student membership for those in accredited programs and associate membership for professionals involved in the field.

A 68-year-old patient with type 2 diabetes is scheduled for a contrast-enhanced CT of the abdomen. The patient's medication list includes Metformin. Their most recent lab results show an eGFR of 50 mL/min/1.73 m². Based on the Canadian Association of Radiologists (CAR) guidelines, what is the most appropriate action regarding the Metformin?

Answer: Proceed with the scan and instruct the patient to continue taking Metformin as prescribed.

According to the Canadian Association of Radiologists (CAR) guidelines, for patients with an estimated Glomerular Filtration Rate (eGFR) greater than 30 mL/min/1.73 m², it is not necessary to discontinue Metformin before or after the administration of iodinated contrast media. The patient's eGFR of 50 mL/min/1.73 m² is well above this threshold, indicating a low risk of contrast-associated acute kidney injury that could lead to lactic acidosis.

An MRT performs a portable chest x-ray using a focused grid. The resulting image demonstrates severe grid cut-off on both lateral edges, while the central portion of the image is properly exposed. What is the most likely cause of this artifact?

Answer: The grid was placed upside-down

A focused grid has its lead strips angled to match the divergence of the x-ray beam at a specific SID range. If the grid is placed upside-down, the strips are angled in opposition to the beam's divergence. This causes the primary beam to be absorbed at the periphery, resulting in severe bilateral cut-off, while only the central, most perpendicular rays can pass through to the detector.

What effect does increasing kVp have on image contrast in digital radiography?

Answer: Contrast decreases from more uniform penetration

Higher kVp reduces subject contrast because higher energy photons penetrate more uniformly.

What safety principle does the fluoroscopic 'dead man switch' enforce?

Answer: It requires continuous operator pressure to maintain X-ray production, preventing inadvertent prolonged exposure

The dead man switch requires the operator to continuously depress a footswitch or hand control to sustain fluoroscopic exposure; releasing it immediately terminates X-ray production, ensuring deliberate and active operator intent.

What is the CFTA significance for CAMRT-certified technologists?

Answer: Facilitates labour mobility by requiring provinces to recognize certification

The CFTA facilitates interprovincial labour mobility for certified professionals.

Why is cultural competency important for Canadian MRTs?

Answer: Canada diverse population requires culturally sensitive care addressing varied beliefs and communication needs

Canada multicultural population requires cultural sensitivity in communication and care.

What is the role of the Radiation Safety Officer in a medical imaging facility?

Answer: Oversees radiation protection program, ensures regulatory compliance, monitors doses, investigates incidents, provides education

The RSO implements and maintains the complete radiation protection program.

What is the purpose of the CAMRT certification exam?

Answer: To test competency in medical radiation technology.

The CAMRT certification exam is designed to rigorously assess a candidate's competency in medical radiation technology. Passing this national examination demonstrates that an individual possesses the essential knowledge, skills, and abilities required to practice safely and effectively. It serves to ensure public safety and uphold professional standards within the field.