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Radiology I
Lab Review (complete)
Question | Answer |
---|---|
How do you verify perpendicular alignment? | Palpate sternum and spine simultaneously in VD and DV views. |
How do you verify lateral alignment? | Palpate iliac crests (point of hip). Fingers should align perpendicular to cassette. |
How do you collimate for a abdominal field? | Cranial border: collimator light placed cranial to liver. Palpating the xiphoid process of the sternum and place two fingers width cranial to the xiphoid process. Caudal border: collimator light reaching the level of greater trochanter femur. |
How do you collimate for a thoracic field? | Cranial border: thoracic inlet (or shoulder joint). Allows for cardiac silhouette to be in the center of the image (5-6th rib space), giving a true representation of the cardiac size and shape. Caudal border: edge of beam 2 cm caudal to last rib. |
What is superimposition? | Placed on or over something else. "an overlying image |
Why is it better to take a minimum of two different "views" of the same area every time a patient is radiographed? | Better visualization of anatomical structures. From 2D -> 3D. Multiple sides of structures, abnormalities or organs are visualized. Multiple angles expose superimposed objects. |
Why does the anode in an x-ray machine spin? | Dissipates heat. Higher mA and kVp. Fast spinning. Stationary helps stabilize the machine. |
Do all x-ray machines have spinning anodes? | No. Portable x-ray machine anodes are stationary. As well as dental. |
Radiographic anatomy: | heart, lung, diaphragm, bladder, kidney, liver |
Axix (C2) | |
Mandible | |
Scapula | |
T10 vertebrae | |
Sternum (Xiphoid process) | |
Ulna (Olecranon) | |
Tibia | |
CR image resolution is always better than conventional film resolution? | False |
Advantages of digital radiographs over traditional screen-film radiography include: | Easier image transport, storage and ability to alter image contrast |
Digital radiography image quality is dependant on correct settings for: | mAs |
the digital technology that we utilized in our on campus lab is: | Indirect digital technology (CR) - Computed Radiography |
Computed Radiography is susceptible to which artifact(s)? | Scatter, movement, time (fading of unprocessed image) |
Film Exposed Index is an estimate of | Technique (x-ray exposure) |
DICOM (Digital Imaging and Communications in Medicine) standards refers to: | The international standard for transmission of medical images. |
DICOM stands for: | Digital Imaging and Communication in Medicine. |
Abdominal Radiographs Right Lateral Abdominal View: | Measure at highest point (usually caudal to last rib), position in (R) lateral incumbency, Forelimbs extended cranially, hindlimbs extended caudally, center beam slightly caudal to last rib, expose during expiratory pause (diaphragm displaced cranially) |
Thoracic Radiographs Left Lateral Thorax View | Center beam caudal border of scapula (5-6 rib space), collimated area includes entire rib cage, cranial border (thoracic inlet), caudal border (2 cm past last rib), dorsal border (spinous processes), ventral border (xiphoid process) Peak inspiration! |
Things to remember when taking radiographs: | Wear your provided dosimeter and appropriate PPE. Verify correct FFD for requested view. Position cassette correctly & collimate! Use the heel effect when appropriate. Use the correct R/L marker Correctly label & process & record in Log. |