LMRT ARRT COMPREHENSIVE EXAM SCRIPT
2026 QUESTIONS WITH ANSWERS GRADED
A+
◉ 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.
2026 QUESTIONS WITH ANSWERS GRADED
A+
◉ 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.
