LMRT ARRT Updated Exam Questions
and Answers | Complete Correct
Answers and Latest Review Guide
• Tachypnea . Answer: Most likely respiratory rate of an adult with
tachypnea is 30 breaths/minute.
• Cesium iodide and gadolinium oxysulfide . Answer: Scintillation
phosphors that emit light when absorbing X-ray photon energy.
• Fetal dosimeter . Answer: Pregnant radiographers should wear it at the
waist under the apron.
• Normal blood pressure range . Answer: In a healthy adult, systolic less
than 120/diastolic less than 80 mmHg.
• Sandbags . Answer: Used as positioning aids for lateral cervical spine
procedures.
• Flat-panel detectors . Answer: Use indirect conversion technology to
convert X-rays to visible light.
• Automatic Rescaling . Answer: Process that corrects for slight under-
exposure or overexposure errors made by the technologist.
,• Characteristic X-rays . Answer: Result from the ionization of the target
atom through total removal of an inner-shell electron.
• Glass Enclosure . Answer: Component that maintains a vacuum inside
the x-ray tube.
• Focused grid . Answer: A grid that has lead strips angled to match the
divergence of the x-ray beam.
• Quality factors affected by SID change . Answer: Size distortion and
receptor exposure.
• Purpose of using a grid . Answer: To improve image contrast during a
radiographic procedure.
• Indirect Effect . Answer: Occurs when radiation strikes water
molecules (cytoplasm).
• Exposure at 80" SID . Answer: If an x-ray of a fractured shoulder was
imaged at 40" SID with a resulting exposure of 100 mR, the new
exposure at 80" would be 25 mR if no changes were made to
compensate.
• Positive Beam Limitation (PBL) . Answer: Ensures x-ray fields are no
larger than receptor exposure.
, • PSP imaging plate . Answer: Requires periodic erasure due to its
ability to record for 48 hours.
• Beam restriction . Answer: Used to reduce patient dose; increasing
beam restriction decreases scatter produced by irradiating tissue.
• Cracks in the imaging plate . Answer: Can be caused by removing and
replacing the plate in the reader.
• Compton interaction . Answer: Type of interaction depicted in the
image.
• Incident electron energy conversion . Answer: During x-ray
production, 1% of incident electron energy is converted to x-rays.
• Radiosensitive tissues . Answer: Skin, bone, and gonads are more
radiosensitive.
• Radiation detection device . Answer: Thermoluminescent dosimeter
(TLD) is specifically used for occupational radiation monitoring.
• Pathologic conditions requiring decreased technical factors . Answer:
Emphysema requires a decrease in technical factors to maintain
acceptable image receptor exposure.
and Answers | Complete Correct
Answers and Latest Review Guide
• Tachypnea . Answer: Most likely respiratory rate of an adult with
tachypnea is 30 breaths/minute.
• Cesium iodide and gadolinium oxysulfide . Answer: Scintillation
phosphors that emit light when absorbing X-ray photon energy.
• Fetal dosimeter . Answer: Pregnant radiographers should wear it at the
waist under the apron.
• Normal blood pressure range . Answer: In a healthy adult, systolic less
than 120/diastolic less than 80 mmHg.
• Sandbags . Answer: Used as positioning aids for lateral cervical spine
procedures.
• Flat-panel detectors . Answer: Use indirect conversion technology to
convert X-rays to visible light.
• Automatic Rescaling . Answer: Process that corrects for slight under-
exposure or overexposure errors made by the technologist.
,• Characteristic X-rays . Answer: Result from the ionization of the target
atom through total removal of an inner-shell electron.
• Glass Enclosure . Answer: Component that maintains a vacuum inside
the x-ray tube.
• Focused grid . Answer: A grid that has lead strips angled to match the
divergence of the x-ray beam.
• Quality factors affected by SID change . Answer: Size distortion and
receptor exposure.
• Purpose of using a grid . Answer: To improve image contrast during a
radiographic procedure.
• Indirect Effect . Answer: Occurs when radiation strikes water
molecules (cytoplasm).
• Exposure at 80" SID . Answer: If an x-ray of a fractured shoulder was
imaged at 40" SID with a resulting exposure of 100 mR, the new
exposure at 80" would be 25 mR if no changes were made to
compensate.
• Positive Beam Limitation (PBL) . Answer: Ensures x-ray fields are no
larger than receptor exposure.
, • PSP imaging plate . Answer: Requires periodic erasure due to its
ability to record for 48 hours.
• Beam restriction . Answer: Used to reduce patient dose; increasing
beam restriction decreases scatter produced by irradiating tissue.
• Cracks in the imaging plate . Answer: Can be caused by removing and
replacing the plate in the reader.
• Compton interaction . Answer: Type of interaction depicted in the
image.
• Incident electron energy conversion . Answer: During x-ray
production, 1% of incident electron energy is converted to x-rays.
• Radiosensitive tissues . Answer: Skin, bone, and gonads are more
radiosensitive.
• Radiation detection device . Answer: Thermoluminescent dosimeter
(TLD) is specifically used for occupational radiation monitoring.
• Pathologic conditions requiring decreased technical factors . Answer:
Emphysema requires a decrease in technical factors to maintain
acceptable image receptor exposure.
