RAD 370 Radiation Therapy Techniques and
Applications Exam Guide with Questions and
Answers| Latest Update
What is used instead of seraben blocks - ✔✔MLC's
Portal films - ✔✔Take through treatment to compare and make sure the setup is still
accurate
Conventional sim - ✔✔Designed to simulate the mechanical, geometrical, and optical
conditions of various treatment units
Gantry components - ✔✔Gantry arm- C structure
Gantry head
Image intensifying/film holder system/OBI- converts x-ray image to light image
Everything rotates around - ✔✔Isocenter
Isocenter is usually at what distance - ✔✔100 cm SID
IEC Protractor Scale - ✔✔0
270 90
180
Varian Protractor Scale - ✔✔180
270 90
, 0
Gantry Head Components: Collimator Assembly - ✔✔Comprises most of gantry head and
rotates 360 degrees
Gantry Head Components: ODI - ✔✔Gives us our numbers and projects the number scale
Gantry Head Components: Field Defining Wires - ✔✔Only on conventional simulator, not
treatment machine. Represent what our treatment field will be.
Gantry Head Components: Beam Restricting Diaphragms - ✔✔Defines axis of field and can
be asymmetric
Gantry Head Components: Fudicial Plate - ✔✔Also called Reticule and BB plate. Has lead
marks on it. Used on treatment machines when imaging the patient. Not left in all the time. If
it's off, need to know how to adjust them
Quality Improvement - ✔✔approach to continuous study and improvement of the process of
providing healthcare services to meet the needs of patients and others
What does QI do? - ✔✔Decrease costs, increase customer satisfaction, ensure quality
throughout the healthcare organization
What does a QI plan help adjust? - ✔✔Increased competition, escalating costs, quality
concerns, demands for increased accountability
TJC - ✔✔An independent, not-for-profit organization dedicated to improving the quality of
care in healthcare settings
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