ONS Radiation Therapy Certificate - Section 3 (Treatment) Exam with all
Correct & 100% Verified Answers |Already Graded A+
1. Goal of radiation - to irradiate a predefined target volume while minimizing exposure
to adjacent normal tissues.
-Radiation oncologists and medical oncologists collaborate to determine
overall goals and treatment approaches.
-Multiple diagnostic procedures are employed to define the tumor
volume and prescribe the correct dose of radiation.
-Radiation physicists, dosimetrists, oncologists, and therapists use
sophisticated hardware and software to model geometric and
dosimetric planning to ensure quality and accuracy.
2. dosimetrist part of radiation therapy team who calculates the absorbed dose of
radiation in matter and tissues
3. Successful
treat-ment depends upon accurate writing and interpretation of the radiation
prescription.
4. treatment
vol-ume
-the area that requires direct irradiation.
5. GTV - Gross tu-
mor volume
6. CTV - Clinical tu- The visible tumor - the malignant growth that is felt or seen on imaging
mor volume
7. PTV -
Planning The tissue that includes the GTV and the microscopic malignant tissue
target
volume
The additional margins added to CTV to account for the pt movement,
tumor growth, and inaccuracies in calculations
8. treated volume the volume enclosed by an isodose surface that is determined by the
RO to be appropriate for the tx of this person and condition - 95%
isodose surface
, ONS Radiation Therapy Certificate - Section 3 (Treatment) Exam with all
Correct & 100% Verified Answers |Already Graded A+
9. isodose radiation dose of equal intensity to more than one body area
10. irradiated
vol-ume the volume that receives a dose significant in relation to normal tissue
tolerance
11. Organs at
risk (OARs)
normal tissues whose radiosensitivity and location may determine the
12. ICRU 50 - refer-
ence point course of treatment planning.
13. Dose volume the point that should be in the central part of the PTV. It should be
his-tograms unambiguous, accurately determined, and clinically relevant.
(DVHs)
complex models used in the reporting and evaluating of 3D
radiotherapy dose distribution
14. planning ensures the most accurate delivery of the most accurate dose, and
includes:
Determining patient positioning/immobilization to ensure consistent
positioning throughout treatment course
Data from computed tomography, magnetic resonance imaging,
positron emis-sion tomography, and manual contouring
Definition of the treatment volumes and the OARs
The design of the treatment (type of radiation, any modifiers)
Calculations regarding the dose distributions
Evaluation planning
Calculations of monitor units or minutes based on the
prescribed dose Creation of blocks or modifiers
Treatment simulation
Patient-specific review of the entire plan, including dose verification.
15. 3DCRT - 3 dimen-
sional conformal delivers prescribed radiation dose to a precise 3D configuration of the tx
radiotherapy volume and minimizes the dose to the surrounding normal tissue.
It requires special planning systems and is delivered w/megavoltage
, ONS Radiation Therapy Certificate - Section 3 (Treatment) Exam with all
Correct & 100% Verified Answers |Already Graded A+
proton and electron
beams.
Correct & 100% Verified Answers |Already Graded A+
1. Goal of radiation - to irradiate a predefined target volume while minimizing exposure
to adjacent normal tissues.
-Radiation oncologists and medical oncologists collaborate to determine
overall goals and treatment approaches.
-Multiple diagnostic procedures are employed to define the tumor
volume and prescribe the correct dose of radiation.
-Radiation physicists, dosimetrists, oncologists, and therapists use
sophisticated hardware and software to model geometric and
dosimetric planning to ensure quality and accuracy.
2. dosimetrist part of radiation therapy team who calculates the absorbed dose of
radiation in matter and tissues
3. Successful
treat-ment depends upon accurate writing and interpretation of the radiation
prescription.
4. treatment
vol-ume
-the area that requires direct irradiation.
5. GTV - Gross tu-
mor volume
6. CTV - Clinical tu- The visible tumor - the malignant growth that is felt or seen on imaging
mor volume
7. PTV -
Planning The tissue that includes the GTV and the microscopic malignant tissue
target
volume
The additional margins added to CTV to account for the pt movement,
tumor growth, and inaccuracies in calculations
8. treated volume the volume enclosed by an isodose surface that is determined by the
RO to be appropriate for the tx of this person and condition - 95%
isodose surface
, ONS Radiation Therapy Certificate - Section 3 (Treatment) Exam with all
Correct & 100% Verified Answers |Already Graded A+
9. isodose radiation dose of equal intensity to more than one body area
10. irradiated
vol-ume the volume that receives a dose significant in relation to normal tissue
tolerance
11. Organs at
risk (OARs)
normal tissues whose radiosensitivity and location may determine the
12. ICRU 50 - refer-
ence point course of treatment planning.
13. Dose volume the point that should be in the central part of the PTV. It should be
his-tograms unambiguous, accurately determined, and clinically relevant.
(DVHs)
complex models used in the reporting and evaluating of 3D
radiotherapy dose distribution
14. planning ensures the most accurate delivery of the most accurate dose, and
includes:
Determining patient positioning/immobilization to ensure consistent
positioning throughout treatment course
Data from computed tomography, magnetic resonance imaging,
positron emis-sion tomography, and manual contouring
Definition of the treatment volumes and the OARs
The design of the treatment (type of radiation, any modifiers)
Calculations regarding the dose distributions
Evaluation planning
Calculations of monitor units or minutes based on the
prescribed dose Creation of blocks or modifiers
Treatment simulation
Patient-specific review of the entire plan, including dose verification.
15. 3DCRT - 3 dimen-
sional conformal delivers prescribed radiation dose to a precise 3D configuration of the tx
radiotherapy volume and minimizes the dose to the surrounding normal tissue.
It requires special planning systems and is delivered w/megavoltage
, ONS Radiation Therapy Certificate - Section 3 (Treatment) Exam with all
Correct & 100% Verified Answers |Already Graded A+
proton and electron
beams.
