Chapter 1 Exam Flashcards
What exposure factor controls density?
mA - Milliamperage
What exposure factor controls contrast?
kVp - Kilovoltage peak
What is the difference between long scale and short scale?
A long scale will be of low contrast, and a short scale will be of high contrast.
What is OID?
Object to image receptor distance.
What happens to your image if you increase OID?
If you increase the OID, the image is worse because it will have increased magnification and distortion.
Position
Position is the patience relevancy to the image receptor.
Projection
Projection is the path of the x-ray beam.
Explain what an LPO is.
Left posterior oblique is next to the image receptor.
What is the difference between arthrology and osteology?
Arthrology is the study of joints.
Osteology is the study of bones.
What is a fowler position?
A recumbent position with the body tilted with the head higher than the feet.
Describe the Trendelenburg position?
A recumbent position with the body tilted with the head lower than the feet.
Describe the lithotomy position.
Recumbent position with knees and hip flexed and thighs, abducted and rotated, externally, supported by ankle supports.
Describe the Sims position.
A recumbent oblique position with a patient lying on the left anterior side with the right knee and thigh flexed, and left arm extended down behind the back.
What is an oblique position?
This position is not perpendicular to the image receptor, and instead is at a 45° angle.
Erect
A body position that is upright either standing or sitting.
Recumbent
A body position that is lying down. Can be supine, prone or lateral.
What is a cephalad angle?
Shooting the central Ray towards the head.
What is a caudaud angle?
Shooting center ray towards the feet.
What are the three cardinal rules?
Time - exposure
Distance - from the x-ray beam
Communication
List the synovial joints
Plane/gliding glass
Ginglymus/hinge
Trochoid/Pivot
Ellipsoid/condyloid
Seller/Saddle
Spheroidal/Ball + Socket
Collimation
Restriction of the x-ray beam
CR
Center Ray - the center most portion of the x-ray beam admitted from the x-ray tube
IR
Image receptor - the device that responds to the ionizing radiation to create the radiographic image after it exits the patient
DR
Digital radiography
Markers
Anatomic markers to indicate right or left anatomy
Shielding
Using lead to shield individual from radiation
Sagittal Plane
Divides the body into left and right parts.
Coronal
Divides the body into anterior and posterior parts
Oblique
45° angle. Can be on longitudal or sagittal plane.
What are the three structural classifications of joints?
Fibrous, Cartilaginous, Synovial
What happens to your image when you decrease the OID?
If you decrease the OID, the image will be better because there will be less magnification and distortion.
