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WorksheetsAdv Modalities Review
Total questions: 35
Worksheet time: 18mins
PET/CT combines which types of information into a single hybrid image?
Bone density + vascular flow
Functional metabolism + anatomic detail
Motor function + ligament motion
Perfusion + echogenicity
What metabolic characteristic allows PET to detect cancer earlier than CT?
Tumors excrete large quantities of sodium
Malignant tissue demonstrates increased glucose consumption
Cancer slows glycolysis
Tumors reflect acoustic energy strongly
PET is most appropriate for evaluating which group of conditions?
Epileptic focus detection
Myocardial perfusion
Fetal skeletal development
Tumor staging
The fundamental advantage of PET over CT is its ability to reveal:
High-contrast bony detail
Metabolic function rather than structure
Superior soft-tissue margins
Real-time motion imaging
In what modality is pair production essential for image creation?
MRI
CT
PET
Fluoroscopy
The nucleus most commonly used for MR signal production is:
Hydrogen
Sodium
Fluorine
Carbon
Compared with standard x-ray tubes, CT x-ray tubes differ in that they:
Produce fewer heat units
Rotate intermittently
Tolerate sustained high temperatures
Emit monochromatic beams
Which procedural technique introduces a catheter after guidewire placement?
Modified Selden technique
Seldinger technique
Tortuous catheterization method
Retrograde puncture method
A patient with suspected subarachnoid aneurysm would most likely undergo which exam?
Venography
Cerebral angiography
Myelography
Cystography
Angiocardiography may be ordered to assess which cardiac conditions?
Congenital structural abnormalities
Valvular function
Myocardial infarct effects
Genetic arrhythmias
Which exam is most appropriate for localizing an active gastrointestinal arterial bleed?
PET
Abdominal angiography
Chest radiography
MRCP
Peripheral angiography is performed primarily to assess:
Nerve conduction speed
Limb ischemia
Muscle strains
Tendon rupture
Interventional radiology procedures offer which clinical advantages?
Less invasiveness
Shorter hospitalization
Longer anesthesia needs
Faster recovery
A TIPS procedure is most commonly used to treat complications of which condition?
Cholelithiasis
Portal hypertension
COPD
Acute pancreatitis
Kyphoplasty is performed mainly to:
Excise spinal tumors
Increase vertebral height after compression fracture
Treat scoliosis
Remove herniated discs
Prior to arterial catheterization, the technologist must document:
Allergy screening
Peripheral pulse checks
Verification of NPO status
Ankle-brachial index
Angiography primarily images which type of vessel?
Lymphatic channels
Arterial structures
Capillaries only
Veins exclusively
Which structure is NOT a deep vein of the lower extremity?
Popliteal
Posterior tibial
Basilic vein
Anterior tibial
Which of the following vessels arise directly from the aortic arch?
Brachiocephalic artery
Left common carotid artery
Left subclavian artery
Right common carotid artery
Right subclavian artery
PET is especially useful for evaluating which neurological conditions?
Dementia
Seizure foci
Language mapping
Peripheral neuropathy
PET tracers are produced using what device?
Linear accelerator
Gamma camera
Cyclotron
Ultrasonic generator
PET detectors typically use which material to register photon events?
Photographic film
Ion chambers
Scintillators
Diamond plates
Which tracer is preferred for evaluating tissue perfusion in PET?
18F-fluoride
15O-water
I-125 albumin
99mTc-MDP
Which of the following organs typically do NOT demonstrate naturally high FDG uptake, making them easier to interpret on PET imaging?
Spleen
Adrenal glands
Brain
Bladder
PET is especially valuable in oncology because it:
Analyzes metabolic activity to track tumor growth
Visualizes bone structure
Measures soft-tissue elasticity
Detects metallic implants
All of the following are common positron-emitting elements used in PET EXCEPT:
Carbon
Fluorine
Oxygen
Technetium
Which imaging planes are commonly acquired directly during routine MRI scanning?
Coronal
Sagittal
Axial
Longitudinal
PET systems determine event location by detecting photons that strike detectors:
At staggered time intervals
Simultaneously on opposite sides
Following absorption in bone
After fluorescence emission
Which change helps show more anatomical detail on MRI images?
Thicker slices
Larger field of view
Thinner slices
Lower matrix size
The spin-echo sequence is favored because it provides:
Enhanced bone imaging
High-quality tissue contrast
Shortest scan times
Motion-free images
Physiologic gating in MRI helps minimize artifacts related to:
Overheating
Metallic implants
Cardiac or respiratory motion
Magnet quench
(Select all that apply) MRI absolutely contraindicates which items?
Implanted pacemakers
Ferromagnetic eye fragments
Cochlear implants
Mild contrast allergies
Spatial resolution in CT is affected by:
Detector size
Focal spot dimension
Image matrix
Slice thickness
Which artifact is most commonly associated with metallic implants in CT imaging?
ring artifact
streak artifact
beam hardening artifact
motion artifact
The CT gantry contains which components?
The x-ray tube and detectors
The power injector
The reconstruction workstation
The image archive
