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Radiation Therapy Test I
n/a
26
Health Care
Undergraduate 3
09/22/2008

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Cards

Term
What are the components used in tumor classification?
Definition
anatomic site, biological behavior, cell of origin, well differentiatied, undifferentiated, benign, malignant, sarcoma, carcinoma
Term
Define benign
Definition
slow-growing, have suffix -oma, well differentiated, do not metasticize
Term
define malignant
Definition
prefix sarci- or carci-, well differentiated to undifferentiated, ability to metasticize, invade and destroy normal tissue, can cause death
Term
Explain the TNM system
Definition
T:size (T1-T4) N: Lymph Node Involvement (N1-N4) M: Metastatic extent (M0-M1)
Term
Define Grading
Definition
Gx-G4; Measure of aggressiveness
Term
Explain the role of surgery in cancer
Definition
localized; can be involved in diagnosis, staging, treatment, palliation, and identification of treatment response
Term
Describe chemotherapy
Definition
systemic; drugs administered orally, through injection, perfusion, or topically
Term
Describe radiation therapy
Definition
alone or with other treatment modalities; preserve function and better cosmetic results, palliation,external beam, intraoperative, brachytherapy
Term
Define etiology
Definition
the study of the causes of a disease.
Term
Define epidemiology
Definition
the study of disease incidence. the patterns of cancer occurance and the death rates.
Term
What is the theory of cancer initiation
Definition
tumors stem from abnormal cellular proliferation
Term
what is prognosis
Definition
life expectancy based on patterns of spread, behavioral characteristics, tumor site, and patient factors
Term
Describe retrospective clinical trials
Definition
the review of past patient treatment and reactions
Term
describe prospective studies
Definition
planned before treatment
Term
explain biopsy
Definition
sample cells are collected via needle aspiration, core needle, endoscopic, incisional, and excisional means. used to determine malignant or benign tumors
Term
explain metasticis and how they occur
Definition
spreading ot a site in the body distant from the primary site via lymph nodes or blood
Term
define isocenter
Definition
the axis of rotation of the gantry, couch, and collimators
Term
kids can water eggs as basements tell time. pick beamfilter in the ioc on the second mldc
Definition
klystron circulator waveguide electron gun accelerator structure bending magnet tungsten target. primary collimator beam flattening filter ion chamber secondary collimator mlc
Term
describe orthogonal imaging
Definition
orthogonal imaging is when two images are taken at 90 degree angles from one another, localizing isocenter on all planes
Term
what is a fiducial marker
Definition
markers placed as reference marks
Term
what are shielding blocks
Definition
used to shape photon or electron fields
Term
what are MLCs
Definition
multileaf collimators. use jaws to shape treatment field
Term
what is SSD
Definition
source-skin distance; ODI (optimal distance indicator helps determine this)
Term
what is hinge angle
Definition
the measure of the angle between the central rays of two intersecting treatment beams
Term
What are the five things necessary in a radiation oncologist's prescription
Definition
site, dose, daily dose, technique, radiation oncologist's signature
Term
discuss prevention, early detection, signs, symptoms, syndromes and diagnosis
Definition
sign; objective finding as perceived by an examiner
symptom; subjective indication of a disease or a change in condition as percieved by the patient
syndrome:a set of signs or symptoms that arise from a common cause
diagnosis:identification of a disease or condition
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