Wrong on Practice Tests Flashcards
Which occurs during x-ray tube preparation/”boost”?
Anode comes to rotational speed and the preselected milliamperage increases in the cathode filament
The latent image in computed tomography is actually _____ within the barium fluorohalide material.
Electron traps
Acute radiation syndrome manifests in four major stages. In what order do these stages occur?
Prodromal, latent, manifest, and recovery/death
Which structure helps stabilize and support the small intestine?
Mesentery
Which clinical indication would suggest the need for a dorsal decubitus abdomen?
Aneurysms, umbilical hernias, and calcification of the aorta
CR angle for modified Robert’s method
15° proximally (toward the wrist)
A radiograph of a tangential, inferior-superior projection of the carpal canal reveals that the hamate is superimposed over the pisiform. How can this be corrected?
Rotate the wrist and hand 10° internally.
Patient has a possibly fractured coronoid process. He cannot fully extend his elbow, what views should be done?
Coyle method with 80° flexion, CR angled 45° away from the shoulder.
If the axillary border of the scapula is more lateral than the vertebral border on a Scap Y, what needs to be done to fix it?
Decrease rotation
First compensatory spinal curvature to develop
Cervical
CR angle for posterior oblique of C-Spine
15° cephlad
Thyroid dose of a posterior cervical oblique is how much greater than an anterior oblique?
10
Sciatic type pain resulting from a slipped disk indicates:
A herniated nucleus pulposus
Angulation for an AP axial L5-S1 is?
Cephlad
LPO position of SI joints best demonstrate the right joint?
False
LAO position of the sternum provides the best frontal image of the sternum?
False
Radiographic appearance of erosion of bony rib margins indicates:
Osteomyelitis
The congenital defect characterized by anterior protrusion of lower sternum:
Pectus carinatum
How can the image be fixed if the mandibular condyles are projected into the petrous pyramids?
Increase the extension of the skull
Where is bile formed?
Liver
A stomach with a duodenal bulb at the level of L1-L2 would be found in a ____ patient.
Sthenic
Which is the most effective cardinal principle of radiation protection?
Distance
The ascending colon and upper rectum are intraperitoneal structures
False
Which vein is NOT selected for venipuncture during and IVU?
Axillary
All temperatures should be identical regardless of where the temperature is measured
False
What two modalities could easily be converted to digital imaging properties?
Ultrasound & Nuc Med
Definition of Modulation Transfer Function (MTF)
The sum of the components in a recording system cannot be greater than the system as a whole
Amplification of the frequencies of the areas of interest is known as:
Edge Enhancement
The layer of the imaging plate that traps electrons during the exposure:
Active
When the imaging plate is irradiated, stimulated electrons enter what layer?
Active
A detector in which each pixel has its own amplifier is known as:
CMOS
What turn semi-conductors into full electrical conductors?
Dopants
The system that contains patient info, billing records, and inpatient orders is?
HIS (Hospital Information System)
The number of pixels contained on a display is known as:
Resolution
Which component of the archive consists of physical storage?
Image Storage & Archive Server
Errors in equipment performance are detected by poor:
Quality Outcomes
How often should the luminescence of a monitor be checked?
Daily
Positioning errors may be the cause of incorrect processing due to mistakes in:
Alignment
Best projection to look for an abdominal aortic aneurysm:
Dorsal Decubitus
Which projection is best for demonstrating the prevertebral region of the abdomen?
Dorsal Decubitus
Radiolysis of positive water molecule make:
H+ and OH*
Radiolysis of negative water molecule make:
OH- and H*
What are the free radicals that have the ability to break chemical bonds and result in biological damage?
H* and OH*
As _____ transfer decreases, RBE decreases
Linear energy
Brain tissue is _____ compared to bone marrow
More radioresistant
Stage of mitosis in which the nuclear membrane disappears/visibility of the nucleolus is absent
Prophase
Most sensitive phase of the cell cycle
Interphase
Cross-Linking results in _____ structures
Spur-like
SSD should be no less than _____ for mobile fluoroscopes
12”
Why is the angle 35 degrees for SI joints for a woman?
Due to the lumbosacral curve
What is the angle for SI joints for a male?
30 degrees
What is the angle of the neck to the shaft of a femur?
125 degrees
What is the degree of obliquity to demonstrate zygopophyseal joints in the T-Spine?
70 degrees
To display the zygopophyseal joints of the right side in the lumbar spine, what oblique should be performed?
RPO
What are flexion/extension laterals of the spine used to evaluate?
Mobility
What is demonstrated on the medial oblique knee?
Proximal tibiofibular joint space
What is not a proper flexion for a lateral knee?
20-30 degree flexion
What is indicative of an underrotated lateral knee?
Visualization of adductor tubercle
What is the purpose of instructing a patient to drop the shoulders during chest radiography?
Move the clavicles inferiorly from the apices
What is the best way to image a tumor in the apices of the lungs?
AP lordotic
Why would an oblique chest be performed?
To remove superimposed tissue
What is the oblique angle to image the heart at?
60 degrees
What oblique should a patient be in for right anterior rib pain?
LAO
Why is a 15-20 degree RAO preferred for a sternum x-ray?
Places the sternum over the right lung field
Which x-ray shows a sunken chest the best?
Oblique sternum
Hypersthenic patients require less obliquity for the sternum
True
What projection best demonstrates a posterior displaced ankle fracture?
Lateromedial lateral
Pes Cavus tube angle
15 degree angle
Pes Planus tube angle
5 degree angle
For weight bearing unilateral what is important to tell the patient?
Put full weight on affected side
Which metatarsal should be captured in an ankle x-ray?
5th
What degree of angle will show the the distal tibiofibular space on an internal oblique ankle x-ray?
45 degrees
Where is a Zenker Diverticulum found?
Esophagus
What is the power source in the United States
6o Hz AC
General x-ray, fluoroscopy, and angiography all use what type phase of x-ray systems?
Three-Phase
What is the force that accelerates electrons for x-radiation?
kVp
What type of radiation makes up 99% of kinetic energy of projectile electrons?
Infrared
A decrease in amplitude is a result of a decrease in what x-ray factor?
mA/s
Added filtration does what to the intensity of the x-ray produced?
Decreases it
