Comprehensive Radiographic Pathology - Ch. 2: Specialized
Imaging Technologies Questions and Answers
static magnetic field directs a specific frequency at the area ✔️✔️Radiofrequency (RF) pulse
substances causing high signal intensity (appear bright) ✔️✔️T1-weighted images
lower signal intensity appear dark ✔️✔️T2-weighted images
relies on fast scanning techniques and rapid gradient switching to image the random
movements of water molecules within in organ (mostly brain) ✔️✔️Diffusion imaging
another application of MRI, relies on fast scanning techniques and the rapid infusion of an
intravenous contrast agent (gladolinium) ✔️✔️Perfusion imaging
fat produces little or no signal and is suppressed on image ✔️✔️Fat suppression
a process that maps specific regions of the brain that correspond to specific functions such as
motor, sensory, memory, vision, and language. ✔️✔️Functional MRI (fMRI)
patient ingests or receives an injection of a radiopharmaceutical that emits radiation and an
image is created from the signals radiating from the patient. ✔️✔️nuclear medicine
a drug that is tagged to emit ionizing radiation (dose is determine by half-life and decay rate of
its attached radionuclide) ✔️✔️radiopharmaceutical
detects the ionizing radiation with a sodium iodide crystal ✔️✔️gamma camera
, nuclear medicine gamma camera that can rotate independently around the patient creating 3D
images ✔️✔️Single-photon emission computed tomography (SPECT)
a radionuclide tracer is used to produce images (decays by positron emission) ✔️✔️Positron
Emission Tomography (PET)
a radionuclide tracer interacts with an electron, producing two high-energy photons (gamma
rays) in opposite directions that are detected by the camera. ✔️✔️annihilation
requires software to fuse two imaging modalities ✔️✔️integrated imaging
equipment designed to image two modalities simultaneously and integrate the images.
✔️✔️direct fusion
echogenic or hyperechoic ✔️✔️Ultrasound depends on the echo of the high-frequency sound
waves produced by the transducer. Tissue that produces a strong reflection is known as
__________
Ultrasound is limited by acoustic barriers, such as ✔️✔️air and bone
the modality that views tissue from multiple angles using a narrow x-ray beam is ✔️✔️CT
The CT technique using continuous scanning while the table moves the patient through the
gantry is ✔️✔️helical scanning
Currently the term multidetector CT indicates ✔️✔️16-320 multidetector array
what is not a post processing imaging technique for CT but is available in MRI imaging? ✔️✔️Fat
suppression
Imaging Technologies Questions and Answers
static magnetic field directs a specific frequency at the area ✔️✔️Radiofrequency (RF) pulse
substances causing high signal intensity (appear bright) ✔️✔️T1-weighted images
lower signal intensity appear dark ✔️✔️T2-weighted images
relies on fast scanning techniques and rapid gradient switching to image the random
movements of water molecules within in organ (mostly brain) ✔️✔️Diffusion imaging
another application of MRI, relies on fast scanning techniques and the rapid infusion of an
intravenous contrast agent (gladolinium) ✔️✔️Perfusion imaging
fat produces little or no signal and is suppressed on image ✔️✔️Fat suppression
a process that maps specific regions of the brain that correspond to specific functions such as
motor, sensory, memory, vision, and language. ✔️✔️Functional MRI (fMRI)
patient ingests or receives an injection of a radiopharmaceutical that emits radiation and an
image is created from the signals radiating from the patient. ✔️✔️nuclear medicine
a drug that is tagged to emit ionizing radiation (dose is determine by half-life and decay rate of
its attached radionuclide) ✔️✔️radiopharmaceutical
detects the ionizing radiation with a sodium iodide crystal ✔️✔️gamma camera
, nuclear medicine gamma camera that can rotate independently around the patient creating 3D
images ✔️✔️Single-photon emission computed tomography (SPECT)
a radionuclide tracer is used to produce images (decays by positron emission) ✔️✔️Positron
Emission Tomography (PET)
a radionuclide tracer interacts with an electron, producing two high-energy photons (gamma
rays) in opposite directions that are detected by the camera. ✔️✔️annihilation
requires software to fuse two imaging modalities ✔️✔️integrated imaging
equipment designed to image two modalities simultaneously and integrate the images.
✔️✔️direct fusion
echogenic or hyperechoic ✔️✔️Ultrasound depends on the echo of the high-frequency sound
waves produced by the transducer. Tissue that produces a strong reflection is known as
__________
Ultrasound is limited by acoustic barriers, such as ✔️✔️air and bone
the modality that views tissue from multiple angles using a narrow x-ray beam is ✔️✔️CT
The CT technique using continuous scanning while the table moves the patient through the
gantry is ✔️✔️helical scanning
Currently the term multidetector CT indicates ✔️✔️16-320 multidetector array
what is not a post processing imaging technique for CT but is available in MRI imaging? ✔️✔️Fat
suppression
